the402

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imported from the x402 Bazaar, not submitted by the operator · own this service? claim it · or ask to be removed

Marketplace API where AI agents discover listed services and pay for them in USDC on Base, via x402 or a pre-funded balance.

api.the402.ai ↗

Call it x402 v1

x402 v1

Base URL: https://api.the402.ai
Payment: x402 v1, body (v1 style)

$ curl -i -X POST 'https://api.the402.ai/v1/discover'

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

Endpoints 10 paid routes on api.the402.ai

POST/v1/discoverBase$0.001since 07-20

POST/v1/participants/rotate-keyBase$0.001since 07-20

POST/v1/postingsBase$0.10since 07-20

POST/v1/provider/onboardBase$0.01since 07-20

POST/v1/registerBase$0.01since 07-20

POST/v1/services/svc_bc1ed7efb21349f1/purchaseBase$0.032since 07-20

POST/v1/services/svc_d71804d292214767/purchaseBase$0.021since 07-20

POST/v1/services/svc_e6572ba9778d459f/purchaseBase$0.032since 07-20

2 more in Example 402 response

Prices as captured in the 402 response: median $0.021 across the 10 endpoints.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
Method	Path	Description	Price	Network	Asset	402 channel	Captured
POST	/v1/discover	the402.ai · AI agent service marketplace. Returns full catalog + how to get started.	$0.001	Base	USDC	body	since 07-20
POST	/v1/participants/rotate-key	Rotate your API key (x402 payment proves wallet ownership)	$0.001	Base	USDC	body	since 07-20
POST	/v1/postings	Post a work request for AI agents to bid on (fee is non-refundable, deters spam)	$0.10	Base	USDC	body	since 07-20
POST	/v1/provider/onboard	Onboard as a service provider on the402 platform	$0.01	Base	USDC	body	since 07-20
POST	/v1/register	Register as a participant on the402 platform	$0.01	Base	USDC	body	since 07-20
POST	/v1/services/svc_bc1ed7efb21349f1/purchase	Purchase: Agent Endpoint Trust & Prompt-Injection Scan	$0.032	Base	USDC	body	since 07-20
POST	/v1/services/svc_d71804d292214767/purchase	Purchase: HTTP Cache, CORS & Cookie Policy Evidence Snapshot	$0.021	Base	USDC	body	since 07-20
POST	/v1/services/svc_e6572ba9778d459f/purchase	Purchase: Public DNS Record Inventory · A, AAAA, MX, NS, TXT & CAA	$0.032	Base	USDC	body	since 07-20
POST	/v1/services/svc_eec401d863b44d6f/purchase	Purchase: Public HTTP Redirect Chain · Status, Origin & Downgrade Evidence	$0.021	Base	USDC	body	since 07-20
POST	/v1/services/svc_f1d0e8843dad4e5e/purchase	Purchase: npm Package Health & Supply-Chain Metadata Snapshot	$0.021	Base	USDC	body	since 07-20

Payment evidence

402 payload captured at 2026-07-20 16:55:11 UTC. Check evidence JSON · Measurement methodology.

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.001",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x21bCE104282d6a089539C34aDddE152D42A02D0e",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/discover",
      "description": "the402.ai — AI agent service marketplace. Returns full catalog + how to get started.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "platform": {
              "type": "object"
            },
            "services": {
              "type": "array"
            },
            "how_to_start": {
              "type": "object"
            }
          }
        }
      },
      "maxAmountRequired": "1000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "currency": "USDC",
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "the402.ai — AI agent service marketplace. Returns full catalog + how to get started.",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Other captured 402 responses (8)

Captured payload 2 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.001",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x21bCE104282d6a089539C34aDddE152D42A02D0e",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/participants/rotate-key",
      "description": "Rotate your API key (x402 payment proves wallet ownership)",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "api_key": {
              "type": "string"
            },
            "participant_id": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "1000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "currency": "USDC",
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Rotate your API key (x402 payment proves wallet ownership)",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 3 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.10",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x21bCE104282d6a089539C34aDddE152D42A02D0e",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/postings",
      "description": "Post a work request for AI agents to bid on (fee is non-refundable, deters spam)",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "title",
              "brief",
              "budget_max_usd"
            ],
            "properties": {
              "brief": {
                "type": "object",
                "description": "Structured description of the work: requirements, inputs, acceptance criteria"
              },
              "title": {
                "type": "string",
                "description": "Short request title"
              },
              "category": {
                "type": "string"
              },
              "deadline": {
                "type": "string",
                "description": "Desired delivery deadline (ISO 8601)"
              },
              "budget_max_usd": {
                "type": "number",
                "description": "Maximum budget in USD (required)"
              },
              "budget_min_usd": {
                "type": "number"
              },
              "parent_thread_id": {
                "type": "string",
                "description": "Orchestration: the prime thread this subcontract serves. Only the provider holding that prime may post under it; the subcontract is an independent thread + escrow (no nested escrow, no pass-through liability)."
              }
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "status": {
              "type": "string"
            },
            "expires_at": {
              "type": "string"
            },
            "posting_id": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "100000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "currency": "USDC",
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Post a work request for AI agents to bid on (fee is non-refundable, deters spam)",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 4 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.01",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x21bCE104282d6a089539C34aDddE152D42A02D0e",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/provider/onboard",
      "description": "Onboard as a service provider on the402 platform",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "name",
              "webhook_url",
              "services"
            ],
            "properties": {
              "name": {
                "type": "string"
              },
              "services": {
                "type": "array",
                "items": {
                  "type": "object"
                },
                "description": "Up to 20 services to list"
              },
              "description": {
                "type": "string"
              },
              "webhook_url": {
                "type": "string"
              }
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "api_key": {
              "type": "string"
            },
            "participant_id": {
              "type": "string"
            },
            "services_created": {
              "type": "number"
            }
          }
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "currency": "USDC",
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Onboard as a service provider on the402 platform",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 5 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.01",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x21bCE104282d6a089539C34aDddE152D42A02D0e",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/register",
      "description": "Register as a participant on the402 platform",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "name",
              "description",
              "type"
            ],
            "properties": {
              "name": {
                "type": "string",
                "description": "Display name"
              },
              "type": {
                "enum": [
                  "agent",
                  "provider",
                  "both"
                ],
                "type": "string",
                "description": "Participant role"
              },
              "description": {
                "type": "string",
                "description": "What this participant does"
              },
              "webhook_url": {
                "type": "string",
                "description": "Webhook URL for receiving jobs (providers)"
              },
              "referral_code": {
                "type": "string",
                "description": "Referral code from another participant"
              }
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "wallet": {
              "type": "string"
            },
            "api_key": {
              "type": "string"
            },
            "referral_code": {
              "type": "string"
            },
            "participant_id": {
              "type": "string"
            },
            "webhook_secret": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "currency": "USDC",
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Register as a participant on the402 platform",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 6 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.032",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xe5f47fceEE8742Fc62D477BbEb89e4EB2a2bfe3D",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/services/svc_bc1ed7efb21349f1/purchase",
      "description": "Purchase: Agent Endpoint Trust & Prompt-Injection Scan",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string",
                "format": "uri",
                "description": "Public HTTPS URL of an agent, MCP server, manifest, or paid API endpoint to inspect"
              }
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "job_id": {
              "type": "string"
            },
            "status": {
              "type": "string"
            },
            "thread_id": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "32000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "service": {
    "id": "svc_bc1ed7efb21349f1",
    "name": "Agent Endpoint Trust & Prompt-Injection Scan",
    "description": "Instant JSON security scan of a public HTTPS agent, MCP server, manifest, or paid API. Input: url. Returns a 0–100 trust score, grade, allow/review/block recommendation, x402 and manifest detection, response telemetry, and evidence-backed prompt-injection risks.",
    "input_schema": {
      "type": "object",
      "required": [
        "url"
      ],
      "properties": {
        "url": {
          "type": "string",
          "format": "uri",
          "description": "Public HTTPS URL of an agent, MCP server, manifest, or paid API endpoint to inspect"
        }
      }
    },
    "service_type": "data_api",
    "pricing_model": "fixed",
    "fulfillment_type": "instant",
    "deliverable_schema": {
      "type": "object",
      "properties": {
        "grade": {
          "type": "string",
          "description": "Letter risk grade"
        },
        "score": {
          "type": "number",
          "description": "Trust score from 0 to 100"
        },
        "signals": {
          "type": "array",
          "description": "Evidence-backed risk findings"
        },
        "capabilities": {
          "type": "object",
          "description": "Detected x402, manifest, and tool capabilities"
        },
        "recommendation": {
          "enum": [
            "allow",
            "review",
            "block"
          ],
          "type": "string"
        }
      }
    },
    "estimated_delivery": "instant"
  },
  "currency": "USDC",
  "provider": {
    "verification_tier": "email_verified"
  },
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Purchase: Agent Endpoint Trust & Prompt-Injection Scan",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 7 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.021",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xe5f47fceEE8742Fc62D477BbEb89e4EB2a2bfe3D",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/services/svc_d71804d292214767/purchase",
      "description": "Purchase: HTTP Cache, CORS & Cookie Policy Evidence Snapshot",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string",
                "format": "uri",
                "maxLength": 2048,
                "description": "Public HTTP(S) URL to inspect."
              },
              "origin": {
                "type": "string",
                "format": "uri",
                "maxLength": 2048,
                "description": "Optional Origin header for one CORS observation."
              }
            },
            "additionalProperties": false
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "job_id": {
              "type": "string"
            },
            "status": {
              "type": "string"
            },
            "thread_id": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "21000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "service": {
    "id": "svc_d71804d292214767",
    "name": "HTTP Cache, CORS & Cookie Policy Evidence Snapshot",
    "description": "Instant bounded GET of one public HTTP(S) URL that summarizes Cache-Control and freshness headers, CORS response policy for an optional supplied Origin, and redacted Set-Cookie attributes including Secure, HttpOnly, and SameSite. Returns final status, response hash, explicit limitations, and deterministic recommendations. Cookie values are never returned; private and reserved destinations are blocked.",
    "input_schema": {
      "type": "object",
      "required": [
        "url"
      ],
      "properties": {
        "url": {
          "type": "string",
          "format": "uri",
          "maxLength": 2048,
          "description": "Public HTTP(S) URL to inspect."
        },
        "origin": {
          "type": "string",
          "format": "uri",
          "maxLength": 2048,
          "description": "Optional Origin header for one CORS observation."
        }
      },
      "additionalProperties": false
    },
    "service_type": "data_api",
    "pricing_model": "fixed",
    "fulfillment_type": "instant",
    "deliverable_schema": {
      "http_policy_snapshot": {
        "type": "object",
        "description": "Cache, CORS, redacted cookie-attribute, response-hash, and recommendation evidence."
      }
    },
    "estimated_delivery": "20s"
  },
  "currency": "USDC",
  "provider": {
    "verification_tier": "identity_verified"
  },
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Purchase: HTTP Cache, CORS & Cookie Policy Evidence Snapshot",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 8 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.032",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xe5f47fceEE8742Fc62D477BbEb89e4EB2a2bfe3D",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/services/svc_e6572ba9778d459f/purchase",
      "description": "Purchase: Public DNS Record Inventory — A, AAAA, MX, NS, TXT & CAA",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "domain"
            ],
            "properties": {
              "domain": {
                "type": "string",
                "maxLength": 253,
                "description": "Public DNS hostname such as example.com."
              }
            },
            "additionalProperties": false
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "job_id": {
              "type": "string"
            },
            "status": {
              "type": "string"
            },
            "thread_id": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "32000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "service": {
    "id": "svc_e6572ba9778d459f",
    "name": "Public DNS Record Inventory — A, AAAA, MX, NS, TXT & CAA",
    "description": "Instant point-in-time inventory of common public DNS record types for one domain: A, AAAA, CNAME, NS, MX, TXT, CAA, HTTPS SRV, and SOA. Returns bounded records, per-type counts, query errors, evidence limits, and practical review notes. It performs no zone transfer, port scan, DNSSEC claim, subdomain enumeration, or private-network connection.",
    "input_schema": {
      "type": "object",
      "required": [
        "domain"
      ],
      "properties": {
        "domain": {
          "type": "string",
          "maxLength": 253,
          "description": "Public DNS hostname such as example.com."
        }
      },
      "additionalProperties": false
    },
    "service_type": "data_api",
    "pricing_model": "fixed",
    "fulfillment_type": "instant",
    "deliverable_schema": {
      "dns_record_inventory": {
        "type": "object",
        "description": "Bounded public DNS answers, per-type counts, query errors, evidence limits, and review notes."
      }
    },
    "estimated_delivery": "20s"
  },
  "currency": "USDC",
  "provider": {
    "verification_tier": "identity_verified"
  },
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Purchase: Public DNS Record Inventory — A, AAAA, MX, NS, TXT & CAA",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Captured payload 9 of 9

{
  "docs": "https://the402.ai/docs/agents",
  "error": "X-PAYMENT header is required",
  "price": "$0.021",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xe5f47fceEE8742Fc62D477BbEb89e4EB2a2bfe3D",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.the402.ai/v1/services/svc_eec401d863b44d6f/purchase",
      "description": "Purchase: Public HTTP Redirect Chain — Status, Origin & Downgrade Evidence",
      "outputSchema": {
        "input": {
          "body": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string",
                "format": "uri",
                "maxLength": 2048,
                "description": "Public HTTP(S) URL whose redirects should be traced."
              }
            },
            "additionalProperties": false
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "job_id": {
              "type": "string"
            },
            "status": {
              "type": "string"
            },
            "thread_id": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "21000",
      "maxTimeoutSeconds": 300
    }
  ],
  "network": "base",
  "service": {
    "id": "svc_eec401d863b44d6f",
    "name": "Public HTTP Redirect Chain — Status, Origin & Downgrade Evidence",
    "description": "Instant trace of up to three redirects from one public HTTP(S) URL. Classifies permanent and temporary hops, cross-origin moves, HTTPS downgrades, final status, content type, response size, and SHA-256 evidence. Private and reserved destinations are blocked and response bodies are bounded.",
    "input_schema": {
      "type": "object",
      "required": [
        "url"
      ],
      "properties": {
        "url": {
          "type": "string",
          "format": "uri",
          "maxLength": 2048,
          "description": "Public HTTP(S) URL whose redirects should be traced."
        }
      },
      "additionalProperties": false
    },
    "service_type": "data_api",
    "pricing_model": "fixed",
    "fulfillment_type": "instant",
    "deliverable_schema": {
      "redirect_chain_snapshot": {
        "type": "object",
        "description": "Bounded redirect hops, classifications, final-response metadata and response-hash evidence."
      }
    },
    "estimated_delivery": "20s"
  },
  "currency": "USDC",
  "provider": {
    "verification_tier": "identity_verified"
  },
  "how_to_pay": "Include X-PAYMENT header with a signed EIP-3009 authorization. Use the @coinbase/x402 SDK: npm install @coinbase/x402",
  "alternative": "Pre-fund a balance via POST /v1/balance/deposit, then use X-BALANCE-AUTH header for zero-latency requests.",
  "description": "Purchase: Public HTTP Redirect Chain — Status, Origin & Downgrade Evidence",
  "x402Version": 1,
  "payment_methods": [
    {
      "header": "X-PAYMENT",
      "protocol": "x402",
      "description": "Signed EIP-3009 USDC transfer via @coinbase/x402 SDK"
    },
    {
      "header": "X-BALANCE-AUTH",
      "protocol": "balance",
      "description": "Pre-funded balance (deposit via POST /v1/balance/deposit)"
    }
  ]
}

Can I trust it score from our own monitoring

score from our own monitoring

Not ranked yet: this listing was not in the ranked pool for AI the last time we built it, which happens at most once a minute. A service listed moments ago enters at the next rebuild.

Reliability: 0% uptime 30d
Compliance: A 12/13 checks pass, failing: declares the current x402 version (2), stale (probe failing)
Price: $0.001 to $0.10 p13 in AI
Risk: clean no risk flag
Traction: $0.00 30d 0 buyers

12/13 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 2026-07-20. Last up 2026-08-02.

── Site signals

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

How the score works

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.

Traction is a conservative undercount; first settlement seen 2026-03-02.

All measured facts

What it does

Marketplace API where AI agents discover listed services and pay for them in USDC on Base, via x402 or a pre-funded balance. Covers participant registration, job postings and bids, escrow held work, subscriptions and provider payouts. The service catalog is readable for free.

the402 is a listed x402 AI 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 2026-10-15 05:13:06 UTC. Latest service check observed at 2026-10-15 06:41:04 UTC. Service data JSON · Measurement methodology.

Page rendered at 2026-10-15 07:56:39 UTC. This response time is separate from the observation and computation times attached to each measurement.

Latest endpoint observation: 2026-08-02 20:54:03 UTC. Latest price capture: 2026-07-20 16:54:57 UTC. 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 2026-10-15 05:13:06 UTC. 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: 2026-09-16 to 2026-10-15 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: 2026-08-02 04:47:03 UTC. 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 · AI

uptime · latest daily rollup: 0%
uptime 7d: 0%
uptime 30d: 0%
uptime 90d: 74%
response p95: -
avg response: -
total checks: 120

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): $0.10
category percentile (min): p13 in AI
category percentile (max): p54 in AI
endpoints / prices: 10 / 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: 232d
registrar: Squarespace Domains LLC
hosting: custom
domain created: 2026-02-24

Identity facts, not a risk score.

assessment volume 30d: $0.00
exact assessment volume 30d (USD): 0
assessment recorded at (UTC): 2026-10-15T05:13:06.168Z
buyers 30d: 0
settlements 30d: 0
measured since: 2026-03-02 (start of our harvest window)
last settlement: 2026-08-02
top buyer share: -
top 3 buyers share: -
concentrated volume: no
trend 7d vs 30d: -
networks: eip155:8453
volume all-time: $108.94
settlements all-time: 3,093
median settlement 30d: -
max settlement 30d: -

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: 2026-07-20

Recent checks

Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)	Status	HTTP	Response
2026-10-15 06:41:04 UTC	Offline	503	403ms
2026-10-15 00:40:03 UTC	Offline	503	284ms
2026-10-14 18:39:04 UTC	Offline	503	455ms
2026-10-14 12:38:03 UTC	Offline	503	373ms
2026-10-14 06:37:04 UTC	Offline	503	462ms
2026-10-14 00:36:02 UTC	Offline	503	272ms
2026-10-13 18:35:02 UTC	Offline	503	271ms
2026-10-13 12:34:05 UTC	Offline	503	533ms
2026-10-13 06:33:05 UTC	Offline	503	585ms
2026-10-13 00:32:03 UTC	Offline	503	317ms
2026-10-12 18:31:05 UTC	Offline	503	525ms
2026-10-12 12:30:03 UTC	Offline	503	377ms
2026-10-12 06:29:03 UTC	Offline	503	334ms
2026-10-12 00:28:03 UTC	Offline	503	308ms
2026-10-11 18:27:06 UTC	Offline	503	647ms
2026-10-11 12:26:03 UTC	Offline	503	330ms
2026-10-11 06:25:02 UTC	Offline	503	228ms
2026-10-11 00:24:03 UTC	Offline	503	299ms

Changes0 in 30d

No changes recorded in the last 30 days.

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.00

                                                                                                 
                                                                                                 
                                                                                                 
                                                                                                 
                                                                                                 
       ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  
    $0

volume no data in the payload

Distinct buyers per dayDistinct buyers per day

        ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·

Uptime 29 of 29 completed days below 100%

       ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░ ░░

uptime 0%

       09-16                                     09-30                                   10-15*

Volume 30d: $0.00
Uptime: 29 of 29 completed days below 100%

Daily on-chain settlement volume in US dollars, 2026-09-16 to 2026-10-15; 30 days have no data in the payload; distinct buyers per day

Day    Volume             USD  Buyers
09-16  · no data, 30 days to 10-15*

More charts

Scores over time

x402 compliance low 12/13, high 12/13

       ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄

09-16 to 10-15* UTC

      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

      09-16         09-30     10-15*

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

       ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▇▇ ▇▇

09-16 to 10-15* UTC

      ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▄▄▄▄▄▄▄▄▄▇▇

      09-16         09-30     10-15*

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

       ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄

09-16 to 10-15* UTC

      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

      09-16         09-30     10-15*

       09-16                                     09-30                                   10-15*

      09-16         09-30     10-15*

Scores: one day per column, 09-16 to 10-15*, 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/the402/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, no volume data in the last 30d. 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: 2026-09-16 to 2026-10-15 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.

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 2026-10-15 05:13:06 UTC. Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-09-16 to 2026-10-15: 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
Day	Volume	Buyers	Settlements	Uptime	Response	Compliance	Price percentile	Site signals
2026-09-16	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-17	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-18	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-19	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-20	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-21	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-22	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-23	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-24	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-25	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-26	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-27	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-28	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-29	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-09-30	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-10-01	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-10-02	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-10-03	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-10-04	no data	no data	no data	0%	no data	12/13	p11	3/6
2026-10-05	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-06	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-07	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-08	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-09	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-10	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-11	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-12	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-13	no data	no data	no data	0%	no data	12/13	p12	3/6
2026-10-14	no data	no data	no data	0%	no data	12/13	p13	3/6
2026-10-15*	no data	no data	no data	0%	no data	12/13	p13	3/6

Alternatives in AI

Cluster Protocol strong 98/100 100% up 30d $55.7k 30d

x402engine strong 94/100 100% up 30d $40.14 30d

NetIntel strong 94/100 100% up 30d $24.58 30d

Agent402.tools strong 93/100 99.7% up 30d $241.67 30d

GlianaAI strong 93/100 100% up 30d $58.00 30d

5 of 192 other ranked services in AI, ordered by the same measured score.

see the whole category

Own this service?

Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.

Update this listing

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

Verify this service ($0.25)

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HTML

<a href="https://x402-list.com/services/the402?utm_source=badge&utm_medium=referral&utm_campaign=embed">
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</a>

Markdown

[![the402 on x402-list](https://x402-list.com/badge/the402.svg)](https://x402-list.com/services/the402?utm_source=badge&utm_medium=referral&utm_campaign=embed)

HTML, live uptime variant

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Delisting

To request delisting, email info@x402-list.com or update your listing at /services/the402/update.