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ARAKEL Machine Evidence Network

offline

payment-ready 2026-09-25, probe currently failing

ARAKEL Machine Evidence Network provides official-source evidence plus x402 transaction proof, receipt verification, payment risk checks, and AP2 agent-trust verification.

Call it x402 v2

x402 v2

Base URL
https://proof.arakelproof.space
Payment
x402 v2, header channel
$ curl -i 'https://proof.arakelproof.space/v1/counterparty-government-check'

An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.

Endpoints 9 paid routes on proof.arakelproof.space

POST/v1/ap2/agent-authority-checkBase$0.005since 09-21
POST/v1/ap2/payment-receipt-verifyBase$0.003since 09-21
GET/v1/counterparty-government-checkBase$0.03since 09-14
GET/v1/federal-register-searchBase$0.005since 09-14
POST/v1/machine/batch-quick-checkBase$0.025since 09-07
GET/v1/ofac-sanctions-screeningBase$0.005since 09-14
POST/v1/x402/payment-risk-checkBase$0.005since 09-21
POST/v1/x402/receipt-verifyBase$0.003since 09-21

1 more in Example 402 response

Prices as captured in the 402 response: median $0.005 across the 9 endpoints.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
MethodPathDescriptionPriceNetworkAsset402 channelCaptured
POST/v1/ap2/agent-authority-checkNo description$0.005BaseUSDCheadersince 09-21
POST/v1/ap2/payment-receipt-verifyNo description$0.003BaseUSDCheadersince 09-21
GET/v1/counterparty-government-checkNo description$0.03BaseUSDCheadersince 09-14
GET/v1/federal-register-searchNo description$0.005BaseUSDCheadersince 09-14
POST/v1/machine/batch-quick-checkNo description$0.025BaseUSDCheadersince 09-07
GET/v1/ofac-sanctions-screeningNo description$0.005BaseUSDCheadersince 09-14
POST/v1/x402/payment-risk-checkNo description$0.005BaseUSDCheadersince 09-21
POST/v1/x402/receipt-verifyNo description$0.003BaseUSDCheadersince 09-21
POST/v1/x402/transaction-proofNo description$0.001BaseUSDCheadersince 09-21

Payment evidence

402 payload captured at . Check evidence JSON · Measurement methodology.

First of 9 payloads captured by the monitor.

126 lines, scroll inside

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/federal-register-search",
    "tags": [
      "government-data",
      "official-source",
      "evidence",
      "verification",
      "federal-register"
    ],
    "mimeType": "application/json",
    "description": "Federal Register search by topic, entity, rule, notice, order, or publication term with signed official evidence.",
    "serviceName": "ARAKEL Machine Evidence Network"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "q": "artificial intelligence"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
            "schema": "arakel.machine-evidence.v2",
            "source": {
              "id": "federal-register"
            },
            "evidence": [
              {}
            ],
            "signature": {
              "alg": "Ed25519"
            },
            "observed_count": 1
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "q"
                ],
                "properties": {
                  "q": {
                    "type": "string",
                    "description": "Federal Register search by topic, entity, rule, notice, order, or publication term with signed official evidence."
                  },
                  "to": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Optional UTC end. Defaults to now."
                  },
                  "from": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Optional UTC start. Defaults to the last 90 days."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}
Other captured 402 responses (8)

Captured payload 2 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "30000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/counterparty-government-check",
    "tags": [
      "government-data",
      "official-source",
      "evidence",
      "verification",
      "compliance"
    ],
    "mimeType": "application/json",
    "description": "Counterparty government check across OFAC sanctions, FDA recalls, USAspending federal awards, and Federal Register evidence.",
    "serviceName": "ARAKEL Machine Evidence Network"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "q": "example company"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
            "schema": "arakel.counterparty-government-check.v1",
            "sources": [
              {
                "id": "ofac",
                "result": "NOT_OBSERVED"
              }
            ],
            "signature": {
              "alg": "Ed25519"
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "q"
                ],
                "properties": {
                  "q": {
                    "type": "string",
                    "description": "Company, organization, person, or counterparty name"
                  },
                  "to": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Optional UTC end; defaults to now"
                  },
                  "from": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Optional UTC start; defaults to one year ago"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 3 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/ofac-sanctions-screening",
    "tags": [
      "government-data",
      "official-source",
      "evidence",
      "verification",
      "ofac"
    ],
    "mimeType": "application/json",
    "description": "OFAC sanctions screening by person or company name against official SDN and consolidated sanctions snapshots.",
    "serviceName": "ARAKEL Machine Evidence Network"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "q": "example company"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
            "schema": "arakel.machine-evidence.v2",
            "source": {
              "id": "ofac"
            },
            "evidence": [
              {}
            ],
            "signature": {
              "alg": "Ed25519"
            },
            "observed_count": 1
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "q"
                ],
                "properties": {
                  "q": {
                    "type": "string",
                    "description": "OFAC sanctions screening by person or company name against official SDN and consolidated sanctions snapshots."
                  },
                  "to": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Optional UTC end. Defaults to now."
                  },
                  "from": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Optional UTC start. Defaults to the last 1 days."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 4 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "25000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/machine/batch-quick-check",
    "tags": [
      "government-data",
      "official-source",
      "evidence",
      "verification",
      "compliance"
    ],
    "mimeType": "application/json",
    "description": "Batch 2-10 signed quick checks. Payment only when every item is conclusive.",
    "serviceName": "ARAKEL Machine Evidence Network"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "items": [
              {
                "to": "2026-08-31T23:59:59Z",
                "from": "2026-08-31T00:00:00Z",
                "entity": "example entity",
                "source": "ofac"
              },
              {
                "to": "2026-08-31T23:59:59Z",
                "from": "2026-08-31T00:00:00Z",
                "entity": "example entity",
                "source": "fda"
              }
            ]
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "schema": "arakel.batch-quick-check.v1",
            "signature": {
              "alg": "Ed25519"
            },
            "items_count": 2,
            "all_conclusive": true
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "required": [
                  "items"
                ],
                "properties": {
                  "items": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    },
                    "maxItems": 10,
                    "minItems": 2
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 5 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/x402/transaction-proof",
    "tags": [
      "x402",
      "payments",
      "verification",
      "base",
      "usdc",
      "agentic-commerce",
      "transaction_proof"
    ],
    "mimeType": "application/json",
    "description": "Verify an existing Base USDC transaction against expected payer, payee, amount, status, and confirmations. Returns a signed ARAKEL proof. WHY PAY: Pay for an independent signed proof that the Base USDC transaction matches the expected payment terms before releasing a paid result or continuing an automated workflow. RESULT AFTER PAYMENT: Signed JSON with proof_id, tx status, confirmations, expected-vs-observed payment checks, matching USDC transfer and Ed25519 ARAKEL signature.",
    "serviceName": "ARAKEL x402 Transaction Proof"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "tx": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "expected_payee": "0x1111111111111111111111111111111111111111",
            "min_confirmations": 1,
            "expected_amount_usdc": "0.005"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "checks": {
              "payee_matches": true,
              "amount_matches": true,
              "transaction_found": true,
              "transaction_success": true,
              "confirmations_sufficient": true
            },
            "schema": "arakel.x402.transaction-proof.v1",
            "decision": "VERIFIED",
            "verified": true,
            "signature": {
              "alg": "Ed25519"
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "anyOf": [
                  {
                    "required": [
                      "expected_amount_usdc"
                    ]
                  },
                  {
                    "required": [
                      "expected_amount_atomic"
                    ]
                  }
                ],
                "required": [
                  "tx",
                  "expected_payee"
                ],
                "properties": {
                  "tx": {
                    "type": "string",
                    "description": "Base transaction hash"
                  },
                  "service_id": {
                    "type": "string"
                  },
                  "request_hash": {
                    "type": "string",
                    "description": "SHA-256 style 32-byte request hash for receipt binding"
                  },
                  "response_hash": {
                    "type": "string",
                    "description": "SHA-256 style 32-byte response hash for receipt binding"
                  },
                  "expected_payee": {
                    "type": "string",
                    "description": "Expected USDC recipient"
                  },
                  "expected_payer": {
                    "type": "string",
                    "description": "Optional expected USDC payer"
                  },
                  "min_confirmations": {
                    "type": "integer",
                    "maximum": 200,
                    "minimum": 1
                  },
                  "expected_amount_usdc": {
                    "type": "string",
                    "description": "Expected USDC decimal amount; provide this or expected_amount_atomic"
                  },
                  "expected_amount_atomic": {
                    "type": "string",
                    "description": "Expected USDC amount in 6-decimal atomic units; provide this or expected_amount_usdc"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 6 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "3000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/x402/receipt-verify",
    "tags": [
      "x402",
      "payments",
      "verification",
      "base",
      "usdc",
      "agentic-commerce",
      "receipt_verify"
    ],
    "mimeType": "application/json",
    "description": "Verify an x402 paid API receipt by validating the existing Base USDC payment and signing a binding to caller-supplied request_hash, response_hash, and service_id. WHY PAY: Pay for an auditable signed paid-API receipt so another machine can verify which request and response were associated with the settled x402 payment. RESULT AFTER PAYMENT: Signed JSON binding request_hash and response_hash to a verified Base USDC payment, service_id and ARAKEL Ed25519 signature.",
    "serviceName": "ARAKEL x402 Transaction Proof"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "tx": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "service_id": "example-service",
            "request_hash": "0x2222222222222222222222222222222222222222222222222222222222222222",
            "response_hash": "0x3333333333333333333333333333333333333333333333333333333333333333",
            "expected_payee": "0x1111111111111111111111111111111111111111",
            "expected_amount_usdc": "0.005"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "schema": "arakel.x402.receipt-verify.v1",
            "payment": {
              "decision": "VERIFIED",
              "verified": true
            },
            "decision": "VERIFIED",
            "verified": true,
            "signature": {
              "alg": "Ed25519"
            },
            "request_hash": "0x…",
            "response_hash": "0x…"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "anyOf": [
                  {
                    "required": [
                      "expected_amount_usdc"
                    ]
                  },
                  {
                    "required": [
                      "expected_amount_atomic"
                    ]
                  }
                ],
                "required": [
                  "tx",
                  "expected_payee",
                  "request_hash",
                  "response_hash"
                ],
                "properties": {
                  "tx": {
                    "type": "string",
                    "description": "Base transaction hash"
                  },
                  "service_id": {
                    "type": "string"
                  },
                  "request_hash": {
                    "type": "string",
                    "description": "SHA-256 style 32-byte request hash for receipt binding"
                  },
                  "response_hash": {
                    "type": "string",
                    "description": "SHA-256 style 32-byte response hash for receipt binding"
                  },
                  "expected_payee": {
                    "type": "string",
                    "description": "Expected USDC recipient"
                  },
                  "expected_payer": {
                    "type": "string",
                    "description": "Optional expected USDC payer"
                  },
                  "min_confirmations": {
                    "type": "integer",
                    "maximum": 200,
                    "minimum": 1
                  },
                  "expected_amount_usdc": {
                    "type": "string",
                    "description": "Expected USDC decimal amount; provide this or expected_amount_atomic"
                  },
                  "expected_amount_atomic": {
                    "type": "string",
                    "description": "Expected USDC amount in 6-decimal atomic units; provide this or expected_amount_usdc"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 7 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/x402/payment-risk-check",
    "tags": [
      "x402",
      "payments",
      "verification",
      "base",
      "usdc",
      "agentic-commerce",
      "payment_risk_check"
    ],
    "mimeType": "application/json",
    "description": "Check an existing Base USDC payment for payee, payer, amount, status, confirmation, and ambiguity mismatches. WHY PAY: Pay for a deterministic machine-readable risk result before trusting or acting on a claimed x402 payment. RESULT AFTER PAYMENT: Signed JSON with risk_score, risk_level, mismatch flags and the underlying Base USDC payment verification.",
    "serviceName": "ARAKEL x402 Transaction Proof"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "tx": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "expected_payee": "0x1111111111111111111111111111111111111111",
            "min_confirmations": 1,
            "expected_amount_usdc": "0.005"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "flags": [],
            "schema": "arakel.x402.payment-risk-check.v1",
            "payment": {
              "decision": "VERIFIED",
              "verified": true
            },
            "signature": {
              "alg": "Ed25519"
            },
            "risk_level": "low",
            "risk_score": 0
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "anyOf": [
                  {
                    "required": [
                      "expected_amount_usdc"
                    ]
                  },
                  {
                    "required": [
                      "expected_amount_atomic"
                    ]
                  }
                ],
                "required": [
                  "tx",
                  "expected_payee"
                ],
                "properties": {
                  "tx": {
                    "type": "string",
                    "description": "Base transaction hash"
                  },
                  "service_id": {
                    "type": "string"
                  },
                  "request_hash": {
                    "type": "string",
                    "description": "SHA-256 style 32-byte request hash for receipt binding"
                  },
                  "response_hash": {
                    "type": "string",
                    "description": "SHA-256 style 32-byte response hash for receipt binding"
                  },
                  "expected_payee": {
                    "type": "string",
                    "description": "Expected USDC recipient"
                  },
                  "expected_payer": {
                    "type": "string",
                    "description": "Optional expected USDC payer"
                  },
                  "min_confirmations": {
                    "type": "integer",
                    "maximum": 200,
                    "minimum": 1
                  },
                  "expected_amount_usdc": {
                    "type": "string",
                    "description": "Expected USDC decimal amount; provide this or expected_amount_atomic"
                  },
                  "expected_amount_atomic": {
                    "type": "string",
                    "description": "Expected USDC amount in 6-decimal atomic units; provide this or expected_amount_usdc"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 8 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/ap2/agent-authority-check",
    "tags": [
      "ap2",
      "agentic-payments",
      "verification",
      "agent-trust",
      "agent_authority"
    ],
    "mimeType": "application/json",
    "description": "Verify an AP2 payment mandate delegation chain under a caller-supplied trusted P-256 root, enforce final aud/nonce, and evaluate supported payment constraints. WHY PAY: Pay for a cryptographic decision on whether the supplied AP2 mandate chain authorizes the requested agent payment under the caller-trusted root and supported constraints. RESULT AFTER PAYMENT: Signed JSON with chain validation, mandate details, supported constraint results, VERIFIED/REJECTED/UNRESOLVED decision and ARAKEL Ed25519 signature.",
    "serviceName": "ARAKEL AP2 Agent Trust"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "expected_aud": "merchant.example",
            "mandate_chain": "<open SD-JWT>~~<closed KB-SD-JWT>",
            "expected_nonce": "challenge",
            "trusted_root_jwk": {
              "x": "...",
              "y": "...",
              "crv": "P-256",
              "kty": "EC"
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "schema": "arakel.ap2.agent-authority-check.v1",
            "decision": "VERIFIED_UNDER_SUPPLIED_ROOT",
            "signature": {
              "alg": "Ed25519"
            },
            "constraints": {
              "passed": true,
              "unresolved": [],
              "violations": []
            },
            "verified_under_supplied_root": true
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "required": [
                  "mandate_chain",
                  "trusted_root_jwk",
                  "expected_aud",
                  "expected_nonce"
                ],
                "properties": {
                  "issuer_jwk": {
                    "type": "object",
                    "description": "Caller-trusted receipt issuer P-256 public JWK"
                  },
                  "receipt_jwt": {
                    "type": "string",
                    "description": "AP2 ES256 Payment Receipt JWT"
                  },
                  "expected_aud": {
                    "type": "string"
                  },
                  "mandate_chain": {
                    "type": "string",
                    "description": "AP2 dSD-JWT mandate chain; for receipt verification provide this or expected_reference"
                  },
                  "expected_nonce": {
                    "type": "string"
                  },
                  "mandate_context": {
                    "type": "object"
                  },
                  "trusted_root_jwk": {
                    "type": "object",
                    "description": "Caller-trusted P-256 root public JWK"
                  },
                  "expected_reference": {
                    "type": "string",
                    "description": "For receipt verification provide this or mandate_chain"
                  },
                  "expected_transaction_id": {
                    "type": "string"
                  },
                  "expected_open_checkout_hash": {
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 9 of 9

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3a2F36D61c9BB3b3ee72426e2B6b58d774605B5e",
      "amount": "3000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://proof.arakelproof.space/v1/ap2/payment-receipt-verify",
    "tags": [
      "ap2",
      "agentic-payments",
      "verification",
      "agent-trust",
      "payment_receipt_verify"
    ],
    "mimeType": "application/json",
    "description": "Verify an AP2 Payment Receipt ES256 JWT and bind its reference to the supplied closed mandate chain or expected reference. WHY PAY: Pay for a signed verification that the AP2 Payment Receipt is cryptographically valid under the supplied issuer key and references the expected closed mandate. RESULT AFTER PAYMENT: Signed JSON with receipt signature/reference checks, VERIFIED/REJECTED decision and ARAKEL Ed25519 signature.",
    "serviceName": "ARAKEL AP2 Agent Trust"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "issuer_jwk": {
              "x": "...",
              "y": "...",
              "crv": "P-256",
              "kty": "EC"
            },
            "receipt_jwt": "<ES256 compact JWT>",
            "mandate_chain": "<open>~~<closed>"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "schema": "arakel.ap2.payment-receipt-verify.v1",
            "decision": "VERIFIED_UNDER_SUPPLIED_ISSUER_KEY",
            "signature": {
              "alg": "Ed25519"
            },
            "verified_under_supplied_issuer_key": true
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "anyOf": [
                  {
                    "required": [
                      "mandate_chain"
                    ]
                  },
                  {
                    "required": [
                      "expected_reference"
                    ]
                  }
                ],
                "required": [
                  "receipt_jwt",
                  "issuer_jwk"
                ],
                "properties": {
                  "issuer_jwk": {
                    "type": "object",
                    "description": "Caller-trusted receipt issuer P-256 public JWK"
                  },
                  "receipt_jwt": {
                    "type": "string",
                    "description": "AP2 ES256 Payment Receipt JWT"
                  },
                  "expected_aud": {
                    "type": "string"
                  },
                  "mandate_chain": {
                    "type": "string",
                    "description": "AP2 dSD-JWT mandate chain; for receipt verification provide this or expected_reference"
                  },
                  "expected_nonce": {
                    "type": "string"
                  },
                  "mandate_context": {
                    "type": "object"
                  },
                  "trusted_root_jwk": {
                    "type": "object",
                    "description": "Caller-trusted P-256 root public JWK"
                  },
                  "expected_reference": {
                    "type": "string",
                    "description": "For receipt verification provide this or mandate_chain"
                  },
                  "expected_transaction_id": {
                    "type": "string"
                  },
                  "expected_open_checkout_hash": {
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Can I trust it score from our own monitoring

score from our own monitoring

75/100 Solid

#105 of 117 in Verification. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.

Reliability
93% uptime 30d
Compliance
A 14/14 checks pass, stale (probe failing)
Price
$0.001 to $0.03 p7 in Verification
Risk
clean no risk flag
Traction
$0.05 30d 9 buyers, top buyer 18% (address, not entity)
Last change
schema changed 21d ago 2 in 30d
14/14 compliance checks
  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

402 terms unchanged since 2026-09-21. Last up 2026-09-25.

── Site signals

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
How the score works

What the score read on this service: status offline, 93% uptime 30d, 380ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

It is a score inside Verification, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 117 listings, this one among them: the same 117 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Paid probe: delivered (HTTP 200) on 2026-09-19. Settled via payAI ($0.05, 11 tx). Traction is a conservative undercount; first settlement seen 2026-08-31.

All measured facts

What it does

ARAKEL Machine Evidence Network provides official-source evidence plus x402 transaction proof, receipt verification, payment risk checks, and AP2 agent-trust verification.

ARAKEL Machine Evidence Network is a listed x402 Verification API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.

Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.

Page rendered at . This response time is separate from the observation and computation times attached to each measurement.

Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.

Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.

Observed daily coverage: 2026-09-13 to 2026-10-12 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Latest settlement in the assessment: . Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.

Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.

x402 List home · Services · Verification

uptime · latest daily rollup
-
uptime 7d
0%
uptime 30d
93%
uptime 90d
94.4%
response p95
380ms
avg response
426ms
total checks
1,351

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

price (min)
$0.001
price (max)
$0.03
category percentile (min)
p7 in Verification
category percentile (max)
p38 in Verification
endpoints / prices
9 / 5
model
tiered
stability
100%

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
39d
registrar
Registrar of Domain Names REG.RU LLC
hosting
custom
domain created
2026-08-27

Identity facts, not a risk score.

assessment volume 30d
$0.05
exact assessment volume 30d (USD)
0.053
assessment recorded at (UTC)
2026-10-12T01:13:00.937Z
buyers 30d
9
settlements 30d
11
measured since
2026-08-31 (start of our harvest window)
last settlement
2026-09-25
top buyer share
18% of 30d volume (address, not entity)
top 3 buyers share
47% of 30d volume (addresses, not entities)
concentrated volume
no
trend 7d vs 30d
0.00x the 30d daily rate
networks
eip155:8453
volume all-time
$0.14
settlements all-time
14
median settlement 30d
$0.005
max settlement 30d
$0.005

Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.

member since
2026-09-07
Recent checks
Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)StatusHTTPResponseEndpoints
Offline53077ms0
Offline530136ms0
Offline530121ms0
Offline530160ms0
Offline530271ms0
Offline53026ms0
Offline530401ms0
Offline53074ms0
Offline530150ms0
Offline530196ms0
Offline530210ms0
Offline53087ms0
Offline53045ms0
Offline530123ms0
Offline53066ms0
Offline530210ms0
Offline53086ms0
Offline530139ms0

Changes2 in 30d

Latest 2 recorded changes, up to 10 in the last 30 days; newest first; observation times in UTC
Observed at (UTC)ChangeEvidence
schema changed

endpoint added POST /v1/ap2/agent-authority-check

endpoint added POST /v1/ap2/payment-receipt-verify

endpoint added POST /v1/x402/payment-risk-check

endpoint added POST /v1/x402/receipt-verify

endpoint added POST /v1/x402/transaction-proof

schema added POST /v1/ap2/agent-authority-check exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /v1/ap2/payment-receipt-verify exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /v1/x402/payment-risk-check exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /v1/x402/receipt-verify exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /v1/x402/transaction-proof exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema changed

endpoint added GET /v1/counterparty-government-check

endpoint added GET /v1/federal-register-search

endpoint added GET /v1/ofac-sanctions-screening

schema added GET /v1/counterparty-government-check exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/federal-register-search exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/ofac-sanctions-screening exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.05, peak $0.02 on 09-13
volume no data in the payload
Distinct buyers per dayDistinct buyers per day
Uptime 21 of 29 completed days below 100%
uptime below 100%, to scale uptime 0%
Volume 30d
$0.05
Uptime
21 of 29 completed days below 100%
Daily on-chain settlement volume in US dollars, 2026-09-13 to 2026-10-12; highest day $0.02 on 09-13; 23 days have no data in the payload; distinct buyers per day
More charts
Response time daily average, ms min 153ms, avg 366ms, max 1059ms

09-13 to 10-12* UTC

Scores over time

x402 compliance low 14/14, high 14/14

09-13 to 10-12* UTC

Price percentile in Verification own low to high; exact values below

09-13 to 10-12* UTC

Site signals present (of 6) own low to high; exact values below

09-13 to 10-12* UTC

Scores: one day per column, 09-13 to 10-12*, on the columns of Response time. Uptime held below 100% on some days in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.

Each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/arakel-machine-evidence-network/price, /scores, /volume and /buyers.

Values

* today so far, partial (UTC).

The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.

Daily snapshot total, 30d: $0.08, peak $0.02 on 09-13. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.

Daily address snapshots: 2026-09-13 to 2026-10-12 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here. † marks a recorded $0.00 with settlements.

Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.

Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-09-13 to 2026-10-12: address settlement volume in USD, distinct buyer and settlement counts, uptime percent, average response milliseconds, compliance passed/total, price percentile 0-100, site signals out of 6; UTC dates
DayVolumeBuyersSettlementsUptimeResponseCompliancePrice percentileSite signals
2026-09-13$0.023398.89%715.37ms14/14p716/6
2026-09-14no datano datano data97.75%1058.60ms14/14p256/6
2026-09-15$0.011197.78%411.57ms14/14p266/6
2026-09-16no datano datano data100%401.63ms14/14p266/6
2026-09-17no datano datano data95.56%351.86ms14/14p265/6
2026-09-18no datano datano data100%152.97ms14/14p265/6
2026-09-19$0.0223100%266.13ms14/14p266/6
2026-09-20$0.00 recorded†11100%250.97ms14/14p266/6
2026-09-21no datano datano data100%224.04ms14/14p86/6
2026-09-22no datano datano data100%206.47ms14/14p86/6
2026-09-23$0.0111100%225.08ms14/14p76/6
2026-09-24$0.0111100%250.33ms14/14p76/6
2026-09-25$0.011177.55%247.79ms14/14p70/6
2026-09-26no datano datano data0%no data14/14p80/6
2026-09-27no datano datano data0%no data14/14p70/6
2026-09-28no datano datano data0%no data14/14p70/6
2026-09-29no datano datano data0%no data14/14p70/6
2026-09-30no datano datano data0%no data14/14p70/6
2026-10-01no datano datano data0%no data14/14p70/6
2026-10-02no datano datano data0%no data14/14p70/6
2026-10-03no datano datano data0%no data14/14p70/6
2026-10-04no datano datano data0%no data14/14p70/6
2026-10-05no datano datano data0%no data14/14p70/6
2026-10-06no datano datano data0%no data14/14p70/6
2026-10-07no datano datano data0%no data14/14p70/6
2026-10-08no datano datano data0%no data14/14p70/6
2026-10-09no datano datano data0%no data14/14p70/6
2026-10-10no datano datano data0%no data14/14p70/6
2026-10-11no datano datano data0%no data14/14p70/6
2026-10-12*no datano datano data0%no data14/14p70/6

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5 of 116 other ranked services in Verification, ordered by the same measured score.

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