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Fia Signals

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payment-ready 2026-10-02, probe currently failing

x402 crypto market-intelligence and token-risk API for autonomous agents, led by a delivery-verified /fear-greed checkout route on Base USDC.

x402.fiasignals.com ↗

Call it x402 v2

x402 v2

Base URL
https://x402.fiasignals.com
Payment
x402 v2, header channel
$ curl -i 'https://x402.fiasignals.com/contract-risk/batch'

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

Endpoints 7 paid routes on x402.fiasignals.com

GET/contract-risk/batchBase$0.03since 06-16
GET/fear-greedBase$0.05since 06-16
GET/fundingBase$0.20since 06-16
GET/pre-trade-risk/batchBase$0.03since 06-16
GET/pricesBase$0.20since 06-16
GET/regimeBase$1.00since 06-16
GET/token-safety/batchBase$0.03since 06-16

Prices as captured in the 402 response: median $0.50 across the 7 endpoints.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
MethodPathDescriptionPriceNetworkAsset402 channelCaptured
GET/contract-risk/batchNo description$0.03BaseUSDCheadersince 06-16
GET/fear-greedNo description$0.05BaseUSDCheadersince 06-16
GET/fundingNo description$0.20BaseUSDCheadersince 06-16
GET/pre-trade-risk/batchNo description$0.03BaseUSDCheadersince 06-16
GET/pricesNo description$0.20BaseUSDCheadersince 06-16
GET/regimeNo description$1.00BaseUSDCheadersince 06-16
GET/token-safety/batchNo description$0.03BaseUSDCheadersince 06-16

Payment evidence

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

First of 7 payloads captured by the monitor.

125 lines, scroll inside

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "200000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "200000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/funding",
    "mimeType": "application/json",
    "description": "Market funding risk check for autonomous trading agents. Returns top positive perpetual funding rates, a decision summary, funding window timing, evidence fields, and risk framing for enter/hold/avoid decisions. Repeat-buyer market-data ladder: buyer 0x3803...101b paid /prices, /fear-greed, then /basis. /funding is the next adjacent paid route to watch; it is not demand proof until payment evidence or delivered paid response appears."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "count": 10,
            "action": "Avoid crowded long exposure unless basis and setup justify funding cost.",
            "product": "market_funding_risk_check",
            "results": [
              {
                "symbol": "BTCUSDT",
                "direction": "positive",
                "funding_rate_pct": 0.01,
                "next_funding_time": "2026-02-25T08:00:00Z"
              }
            ],
            "decision": "CAUTION",
            "evidence": {
              "top_symbol": "BTCUSDT",
              "next_funding_utc": "2026-02-25 08:00:00 UTC",
              "max_funding_rate_pct": 0.01
            },
            "timestamp": "2026-02-25T07:00:00+00:00"
          }
        },
        "positioning": "Use after /basis when an agent needs to decide whether perp funding makes a trade expensive, attractive, or worth avoiding.",
        "conversion_copy": "Repeat-buyer market-data ladder: buyer 0x3803...101b paid /prices, /fear-greed, then /basis. /funding is the next adjacent paid route to watch; it is not demand proof until payment evidence or delivered paid response appears.",
        "buyer_conversion_proof": {
          "url": "https://x402.fiasignals.com/basis",
          "asset": "Base USDC",
          "route": "/basis",
          "method": "GET or HEAD",
          "network": "eip155:8453",
          "latest_tx": "0xcdd795d053277ddea1c89703300a7e5ce2e1b9416d96401d064d9cf38bae2138",
          "price_usdc": "0.25",
          "backup_route": "/dominance",
          "booking_rule": "/funding remains measurement-only until a payment header, paid 200, settlement, buyer hash, or delivery anomaly appears.",
          "latest_buyer": "0x3803A19280DeeFe533D177C4A169412BD341101b",
          "route_family": [
            "/prices",
            "/fear-greed",
            "/basis"
          ],
          "strict_delivery_yes": 1,
          "paid_attempts_observed": 1,
          "paid_delivery_failures": 0,
          "latest_strict_delivery_utc": "2026-05-26T15:15:57Z",
          "next_adjacent_route_to_measure": "/funding"
        }
      },
      "schema": {
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "method"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "properties": {
                  "format": {
                    "enum": [
                      "json",
                      "minimal"
                    ],
                    "type": "string",
                    "default": "json"
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "type": "object",
                "description": "JSON response with market intelligence data"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}
Other captured 402 responses (6)

Captured payload 2 of 7

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "200000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/prices",
    "mimeType": "application/json",
    "description": "Real-time spot prices for up to 20 crypto symbols in a single call. Pass ?symbols=BTC,ETH,SOL or leave blank for top 20 by volume. Returns price, 24h change %, 24h high/low."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "count": 3,
            "results": [
              {
                "price": 68841.88,
                "symbol": "BTCUSDT",
                "low_24h": 64000,
                "high_24h": 69500,
                "change_24h_pct": 7.4
              },
              {
                "price": 2080.69,
                "symbol": "ETHUSDT",
                "low_24h": 1845,
                "high_24h": 2090,
                "change_24h_pct": 12.33
              },
              {
                "price": 88.88,
                "symbol": "SOLUSDT",
                "low_24h": 77,
                "high_24h": 89,
                "change_24h_pct": 14.01
              }
            ],
            "timestamp": "2026-02-25T19:00:00+00:00"
          }
        }
      },
      "schema": {
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "method"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "properties": {
                  "format": {
                    "enum": [
                      "json",
                      "minimal"
                    ],
                    "type": "string",
                    "default": "json"
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "type": "object",
                "description": "JSON response with market intelligence data"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 3 of 7

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "1000000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "1000000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/regime",
    "mimeType": "application/json",
    "description": "Bitcoin and crypto market regime API for trading agents. Returns volatility regime, RSI, ADX, confidence score, and actionable recommendation for bots deciding whether to trade, wait, hedge, or reduce exposure."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "chain": "base",
            "token_address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "adx": 34.1,
            "rsi": 62.4,
            "regime": "TRENDING UP",
            "timestamp": "2026-02-25T07:00:00+00:00",
            "confidence": "HIGH (0.85)",
            "recommendation": "Favour longs with trailing stops. Grid bot above current price."
          }
        }
      },
      "schema": {
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "method"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "properties": {
                  "format": {
                    "enum": [
                      "json",
                      "minimal"
                    ],
                    "type": "string",
                    "default": "json"
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "type": "object",
                "description": "JSON response with market intelligence data"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 4 of 7

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "30000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/pre-trade-risk/batch",
    "mimeType": "application/json",
    "description": "Fia Signals x402 Base USDC token safety and smart contract risk batch API for buyer agents, trading bots, swap routers, and A2A commerce. Screen up to 5 Base/EVM contracts before a swap for contract risk, rugpull, honeypot, liquidity, and market risk. Returns safe/risky/blocked verdicts, scores, warnings, GoPlus and DexScreener evidence, aggregate counts, and a non-breaking 0.50 USDC bundled-risk-pack payable tier in one paid pre-swap call."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "chain": "base",
            "token_addresses": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "count": 3,
            "results": [
              {
                "action": "PROCEED",
                "verdict": "safe",
                "safety_score": 90
              }
            ],
            "summary": {
              "safe": 1,
              "risky": 1,
              "blocked": 1
            }
          }
        },
        "upsell": {
          "id": "bundled-risk-pack",
          "name": "Fia Signals Bundled Risk Pack",
          "status": "payable_x402_route_live",
          "delivers": [
            "combined token safety and smart contract risk summary",
            "up to 5 Base/EVM contracts from the existing batch payload",
            "ranked proceed/caution/reject queue",
            "aggregate blocker reasons and warnings",
            "buyer-facing next-action memo for swap routers",
            "strict proof fields for revenue reconciliation"
          ],
          "price_usdc": "0.50",
          "buyer_action": "Use this as the next paid step after any /token-safety, /token-safety/batch, /pre-trade-risk, or /pre-trade-risk/batch hit. Do not buy another isolated starter check when the agent needs a ranked swap decision packet.",
          "truth_status": "not_revenue_until_distinct_external_0_50_payment_tx_ref_or_completed_acp_job",
          "payable_route": "https://x402.fiasignals.com/bundled-risk-pack",
          "starter_routes": [
            "https://x402.fiasignals.com/token-safety/batch",
            "https://x402.fiasignals.com/contract-risk/batch"
          ],
          "amount_raw_usdc": "500000",
          "payable_methods": [
            "GET",
            "POST"
          ],
          "accepts_ordering": "starter_first_bundle_second",
          "non_breaking_policy": "Keep existing 0.03 USDC batch endpoints unchanged. Buyers who want the 0.50 USDC bundle should pay the distinct bundled-risk-pack route.",
          "target_buyer_signal": "Repeat buyers using token-safety and contract-risk batch checks who need a larger pre-swap risk packet instead of another isolated 0.03 USDC call.",
          "starter_accepts_index": 0,
          "preferred_accepts_index": 1,
          "starter_amount_raw_usdc": "30000",
          "preferred_selection_hint": "Starter buyers can use accepts[0] at 30000 raw USDC. Repeat buyers, multi-token buyers, and agents that already know they need a combined risk memo should select accepts[1] at 500000 raw USDC or pay the distinct bundled-risk-pack route.",
          "preferred_amount_raw_usdc": "500000",
          "recommended_for_repeat_buyers": true
        },
        "dedup_alert_discipline": {
          "rule": "one reconcile per unique x402 tx_ref across x402_events and x402_sales",
          "watcher": "tools/x402_bundle_watch.py",
          "suppress": "duplicate alerts for the same tx_ref are operating noise, not new revenue",
          "fallback_key": "payment_proof_fingerprint, then endpoint+buyer+amount+timestamp_bucket when tx_ref is missing",
          "dedupe_priority": [
            "tx_ref",
            "payment_proof_fingerprint",
            "endpoint+buyer+amount+timestamp_bucket"
          ]
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "queryParams"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "POST"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "token_addresses"
                ],
                "properties": {
                  "chain": {
                    "type": "string",
                    "default": "base"
                  },
                  "token_addresses": {
                    "type": "string",
                    "description": "Comma-separated EVM token addresses, maximum 5."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type",
              "example"
            ],
            "properties": {
              "chain": {
                "type": "string"
              },
              "count": {
                "type": "integer",
                "maximum": 5,
                "minimum": 1
              },
              "limit": {
                "type": "integer",
                "const": 5
              },
              "results": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "action": {
                      "type": "string"
                    },
                    "reasons": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "sources": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "verdict": {
                      "enum": [
                        "safe",
                        "risky",
                        "blocked",
                        "error"
                      ],
                      "type": "string"
                    },
                    "warnings": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "confidence": {
                      "type": "string"
                    },
                    "raw_checks": {
                      "type": "object"
                    },
                    "safety_score": {
                      "type": "integer",
                      "maximum": 100,
                      "minimum": 0
                    }
                  }
                }
              },
              "summary": {
                "type": "object",
                "properties": {
                  "safe": {
                    "type": "integer"
                  },
                  "error": {
                    "type": "integer"
                  },
                  "risky": {
                    "type": "integer"
                  },
                  "blocked": {
                    "type": "integer"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 5 of 7

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "30000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/token-safety/batch",
    "mimeType": "application/json",
    "description": "Fia Signals x402 Base USDC token safety and smart contract risk batch API for buyer agents, trading bots, swap routers, and A2A commerce. Screen up to 5 Base/EVM contracts before a swap for contract risk, rugpull, honeypot, liquidity, and market risk. Returns safe/risky/blocked verdicts, scores, warnings, GoPlus and DexScreener evidence, aggregate counts, and a non-breaking 0.50 USDC bundled-risk-pack payable tier in one paid pre-swap call."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "chain": "base",
            "token_addresses": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "base",
            "count": 2,
            "limit": 5,
            "results": [
              {
                "action": "PROCEED",
                "sources": [
                  "GoPlus",
                  "DexScreener"
                ],
                "verdict": "safe",
                "confidence": "medium",
                "safety_score": 90
              }
            ],
            "summary": {
              "safe": 2,
              "error": 0,
              "risky": 0,
              "blocked": 0
            }
          }
        },
        "upsell": {
          "id": "bundled-risk-pack",
          "name": "Fia Signals Bundled Risk Pack",
          "status": "payable_x402_route_live",
          "delivers": [
            "combined token safety and smart contract risk summary",
            "up to 5 Base/EVM contracts from the existing batch payload",
            "ranked proceed/caution/reject queue",
            "aggregate blocker reasons and warnings",
            "buyer-facing next-action memo for swap routers",
            "strict proof fields for revenue reconciliation"
          ],
          "price_usdc": "0.50",
          "buyer_action": "Use this as the next paid step after any /token-safety, /token-safety/batch, /pre-trade-risk, or /pre-trade-risk/batch hit. Do not buy another isolated starter check when the agent needs a ranked swap decision packet.",
          "truth_status": "not_revenue_until_distinct_external_0_50_payment_tx_ref_or_completed_acp_job",
          "payable_route": "https://x402.fiasignals.com/bundled-risk-pack",
          "starter_routes": [
            "https://x402.fiasignals.com/token-safety/batch",
            "https://x402.fiasignals.com/contract-risk/batch"
          ],
          "amount_raw_usdc": "500000",
          "payable_methods": [
            "GET",
            "POST"
          ],
          "accepts_ordering": "starter_first_bundle_second",
          "non_breaking_policy": "Keep existing 0.03 USDC batch endpoints unchanged. Buyers who want the 0.50 USDC bundle should pay the distinct bundled-risk-pack route.",
          "target_buyer_signal": "Repeat buyers using token-safety and contract-risk batch checks who need a larger pre-swap risk packet instead of another isolated 0.03 USDC call.",
          "starter_accepts_index": 0,
          "preferred_accepts_index": 1,
          "starter_amount_raw_usdc": "30000",
          "preferred_selection_hint": "Starter buyers can use accepts[0] at 30000 raw USDC. Repeat buyers, multi-token buyers, and agents that already know they need a combined risk memo should select accepts[1] at 500000 raw USDC or pay the distinct bundled-risk-pack route.",
          "preferred_amount_raw_usdc": "500000",
          "recommended_for_repeat_buyers": true
        },
        "dedup_alert_discipline": {
          "rule": "one reconcile per unique x402 tx_ref across x402_events and x402_sales",
          "watcher": "tools/x402_bundle_watch.py",
          "suppress": "duplicate alerts for the same tx_ref are operating noise, not new revenue",
          "fallback_key": "payment_proof_fingerprint, then endpoint+buyer+amount+timestamp_bucket when tx_ref is missing",
          "dedupe_priority": [
            "tx_ref",
            "payment_proof_fingerprint",
            "endpoint+buyer+amount+timestamp_bucket"
          ]
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "queryParams"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "POST"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "token_addresses"
                ],
                "properties": {
                  "chain": {
                    "type": "string",
                    "default": "base"
                  },
                  "token_addresses": {
                    "type": "string",
                    "description": "Comma-separated EVM token addresses, maximum 5."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type",
              "example"
            ],
            "properties": {
              "chain": {
                "type": "string"
              },
              "count": {
                "type": "integer",
                "maximum": 5,
                "minimum": 1
              },
              "limit": {
                "type": "integer",
                "const": 5
              },
              "results": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "action": {
                      "type": "string"
                    },
                    "reasons": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "sources": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "verdict": {
                      "enum": [
                        "safe",
                        "risky",
                        "blocked",
                        "error"
                      ],
                      "type": "string"
                    },
                    "warnings": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "confidence": {
                      "type": "string"
                    },
                    "raw_checks": {
                      "type": "object"
                    },
                    "safety_score": {
                      "type": "integer",
                      "maximum": 100,
                      "minimum": 0
                    }
                  }
                }
              },
              "summary": {
                "type": "object",
                "properties": {
                  "safe": {
                    "type": "integer"
                  },
                  "error": {
                    "type": "integer"
                  },
                  "risky": {
                    "type": "integer"
                  },
                  "blocked": {
                    "type": "integer"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 6 of 7

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/fear-greed",
    "mimeType": "application/json",
    "description": "Crypto Fear and Greed Index API - real-time market sentiment indicator for Bitcoin and crypto. Contrarian trading signal based on market psychology. HEAD/GET paid-compatible /fear-greed route on Base USDC; delivery-gated; last strict paid delivery YES at 2026-06-14T00:15:47Z; 3 paid attempts, 3 delivery YES, 0 paid delivery failures."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET"
        },
        "output": {
          "description": "JSON with value (0-100), classification (Extreme Fear/Fear/Neutral/Greed/Extreme Greed), previous_close value, change since previous day, and ISO timestamp."
        },
        "conversion_copy": "HEAD/GET paid-compatible /fear-greed route on Base USDC; delivery-gated; last strict paid delivery YES at 2026-06-14T00:15:47Z; 3 paid attempts, 3 delivery YES, 0 paid delivery failures.",
        "buyer_conversion_proof": {
          "url": "https://x402.fiasignals.com/fear-greed",
          "asset": "Base USDC",
          "route": "/fear-greed",
          "method": "GET or HEAD",
          "network": "eip155:8453",
          "latest_tx": "0x0ca44cc649fdc9c5c785014be1f549a64fe9523638c824d7e59ad47639516c27",
          "price_usdc": "0.05",
          "booking_rule": "Payment without delivery blocks revenue booking; payment plus delivery is eligible for strict ledger review.",
          "latest_buyer": "0x3803A19280DeeFe533D177C4A169412BD341101b",
          "strict_delivery_yes": 3,
          "paid_attempts_observed": 3,
          "paid_delivery_failures": 0,
          "latest_strict_delivery_utc": "2026-06-14T00:15:47Z"
        }
      },
      "schema": {
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "method"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "properties": {
                  "format": {
                    "enum": [
                      "json",
                      "minimal"
                    ],
                    "type": "string",
                    "default": "json"
                  }
                }
              }
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "type": "object",
                "description": "JSON response with market intelligence data"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 7 of 7

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "30000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.fiasignals.com/contract-risk/batch",
    "mimeType": "application/json",
    "description": "Fia Signals x402 Base USDC token safety and smart contract risk batch API for buyer agents, trading bots, swap routers, and A2A commerce. Screen up to 5 Base/EVM contracts before a swap for contract risk, rugpull, honeypot, liquidity, and market risk. Returns safe/risky/blocked verdicts, scores, warnings, GoPlus and DexScreener evidence, aggregate counts, and a non-breaking 0.50 USDC bundled-risk-pack payable tier in one paid pre-swap call."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "chain": "base",
            "token_addresses": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "base",
            "count": 2,
            "limit": 5,
            "results": [
              {
                "action": "PROCEED",
                "sources": [
                  "GoPlus",
                  "DexScreener"
                ],
                "verdict": "safe",
                "confidence": "medium",
                "safety_score": 90
              }
            ],
            "summary": {
              "safe": 2,
              "error": 0,
              "risky": 0,
              "blocked": 0
            }
          }
        },
        "upsell": {
          "id": "bundled-risk-pack",
          "name": "Fia Signals Bundled Risk Pack",
          "status": "payable_x402_route_live",
          "delivers": [
            "combined token safety and smart contract risk summary",
            "up to 5 Base/EVM contracts from the existing batch payload",
            "ranked proceed/caution/reject queue",
            "aggregate blocker reasons and warnings",
            "buyer-facing next-action memo for swap routers",
            "strict proof fields for revenue reconciliation"
          ],
          "price_usdc": "0.50",
          "buyer_action": "Use this as the next paid step after any /token-safety, /token-safety/batch, /pre-trade-risk, or /pre-trade-risk/batch hit. Do not buy another isolated starter check when the agent needs a ranked swap decision packet.",
          "truth_status": "not_revenue_until_distinct_external_0_50_payment_tx_ref_or_completed_acp_job",
          "payable_route": "https://x402.fiasignals.com/bundled-risk-pack",
          "starter_routes": [
            "https://x402.fiasignals.com/token-safety/batch",
            "https://x402.fiasignals.com/contract-risk/batch"
          ],
          "amount_raw_usdc": "500000",
          "payable_methods": [
            "GET",
            "POST"
          ],
          "accepts_ordering": "starter_first_bundle_second",
          "non_breaking_policy": "Keep existing 0.03 USDC batch endpoints unchanged. Buyers who want the 0.50 USDC bundle should pay the distinct bundled-risk-pack route.",
          "target_buyer_signal": "Repeat buyers using token-safety and contract-risk batch checks who need a larger pre-swap risk packet instead of another isolated 0.03 USDC call.",
          "starter_accepts_index": 0,
          "preferred_accepts_index": 1,
          "starter_amount_raw_usdc": "30000",
          "preferred_selection_hint": "Starter buyers can use accepts[0] at 30000 raw USDC. Repeat buyers, multi-token buyers, and agents that already know they need a combined risk memo should select accepts[1] at 500000 raw USDC or pay the distinct bundled-risk-pack route.",
          "preferred_amount_raw_usdc": "500000",
          "recommended_for_repeat_buyers": true
        },
        "dedup_alert_discipline": {
          "rule": "one reconcile per unique x402 tx_ref across x402_events and x402_sales",
          "watcher": "tools/x402_bundle_watch.py",
          "suppress": "duplicate alerts for the same tx_ref are operating noise, not new revenue",
          "fallback_key": "payment_proof_fingerprint, then endpoint+buyer+amount+timestamp_bucket when tx_ref is missing",
          "dedupe_priority": [
            "tx_ref",
            "payment_proof_fingerprint",
            "endpoint+buyer+amount+timestamp_bucket"
          ]
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "queryParams"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "POST"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "token_addresses"
                ],
                "properties": {
                  "chain": {
                    "type": "string",
                    "default": "base"
                  },
                  "token_addresses": {
                    "type": "string",
                    "description": "Comma-separated EVM token addresses, maximum 5."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type",
              "example"
            ],
            "properties": {
              "chain": {
                "type": "string"
              },
              "count": {
                "type": "integer",
                "maximum": 5,
                "minimum": 1
              },
              "limit": {
                "type": "integer",
                "const": 5
              },
              "results": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "action": {
                      "type": "string"
                    },
                    "reasons": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "sources": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "verdict": {
                      "enum": [
                        "safe",
                        "risky",
                        "blocked",
                        "error"
                      ],
                      "type": "string"
                    },
                    "warnings": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "confidence": {
                      "type": "string"
                    },
                    "raw_checks": {
                      "type": "object"
                    },
                    "safety_score": {
                      "type": "integer",
                      "maximum": 100,
                      "minimum": 0
                    }
                  }
                }
              },
              "summary": {
                "type": "object",
                "properties": {
                  "safe": {
                    "type": "integer"
                  },
                  "error": {
                    "type": "integer"
                  },
                  "risky": {
                    "type": "integer"
                  },
                  "blocked": {
                    "type": "integer"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Can I trust it score from our own monitoring

score from our own monitoring

69/100 Mixed

#106 of 109 in Finance. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.

Reliability
94.7% uptime 30d
Compliance
A 14/14 checks pass, stale (probe failing)
Price
$0.03 to $1.00 p69 in Finance
Risk
clean no risk flag
Traction
$0.78 30d 2 buyers, top buyer 96% (address, not entity)
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 2026-06-16. Last up 2026-10-02.

── 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, 94.7% uptime 30d, 695ms response p95, x402 compliance 14 of 14, $0.03 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 Finance, 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 109 listings, this one among them: the same 109 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.

Settled via coinbase ($0.78, 4 tx). Traction is a conservative undercount; first settlement seen 2026-04-24.

All measured facts

What it does

x402 crypto market-intelligence and token-risk API for autonomous agents, led by a delivery-verified /fear-greed checkout route on Base USDC.

Fia Signals is a listed x402 Finance 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: 2026-09-18 to 2026-10-17 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 · Finance

uptime · latest daily rollup
0%
uptime 7d
0%
uptime 30d
94.7%
uptime 90d
94.5%
response p95
695ms
avg response
602ms
total checks
1,421

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

price (min)
$0.03
price (max)
$1.00
category percentile (min)
p69 in Finance
category percentile (max)
p84 in Finance
endpoints / prices
7 / 5
model
tiered
stability
58%

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
-
registrar
-
hosting
custom
domain created
---

Identity facts, not a risk score.

assessment volume 30d
$0.78
exact assessment volume 30d (USD)
0.78
assessment recorded at (UTC)
2026-10-17T06:43:08.778Z
buyers 30d
2
settlements 30d
4
measured since
2026-04-24 (start of our harvest window)
last settlement
2026-09-18
top buyer share
96% of 30d volume (address, not entity)
top 3 buyers share
100% 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
$6.14
settlements all-time
93
median settlement 30d
$0.225
max settlement 30d
$0.30

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
2026-06-01
Recent checks
Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)StatusHTTPResponseEndpoints
Offline53058ms0
Offline53053ms0
Offline53052ms0
Offline53027ms0
Offline53031ms0
Offline530231ms0
Offline530144ms0
Offline53063ms0
Offline530127ms0
Offline53033ms0
Offline530306ms0
Offline53037ms0
Offline53036ms0
Offline530107ms0
Offline530147ms0
Offline530284ms0
Offline530174ms0
Offline53068ms0

Changes0 in 30d

No changes recorded in the last 30 days.

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.78, peak $0.78 on 09-18
volume no data in the payload
Distinct buyers per dayDistinct buyers per day
Uptime 16 of 29 completed days below 100%
uptime below 100%, to scale uptime 0%
Volume 30d
$0.78
Uptime
16 of 29 completed days below 100%
Daily on-chain settlement volume in US dollars, 2026-09-18 to 2026-10-17; highest day $0.78 on 09-18; 29 days have no data in the payload; distinct buyers per day
More charts
Response time daily average, ms min 440ms, avg 599ms, max 814ms

09-18 to 10-17* UTC

Scores over time

x402 compliance low 14/14, high 14/14

09-18 to 10-17* UTC

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

09-18 to 10-17* UTC

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

09-18 to 10-17* UTC

Scores: one day per column, 09-18 to 10-17*, 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/fia-signals/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: $0.78, peak $0.78 on 09-18. 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: 2026-09-18 to 2026-10-17 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 . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-09-18 to 2026-10-17: 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
2026-09-18$0.7824100%675.31ms14/14p684/6
2026-09-19no datano datano data100%741.30ms14/14p684/6
2026-09-20no datano datano data100%440.00ms14/14p684/6
2026-09-21no datano datano data100%813.90ms14/14p674/6
2026-09-22no datano datano data100%686.06ms14/14p674/6
2026-09-23no datano datano data97.78%645.08ms14/14p664/6
2026-09-24no datano datano data100%488.54ms14/14p664/6
2026-09-25no datano datano data100%490.11ms14/14p664/6
2026-09-26no datano datano data100%692.78ms14/14p654/6
2026-09-27no datano datano data100%606.46ms14/14p654/6
2026-09-28no datano datano data100%611.02ms14/14p664/6
2026-09-29no datano datano data100%580.67ms14/14p664/6
2026-09-30no datano datano data100%573.31ms14/14p664/6
2026-10-01no datano datano data100%452.53ms14/14p664/6
2026-10-02no datano datano data52%487.00ms14/14p664/6
2026-10-03no datano datano data0%no data14/14p664/6
2026-10-04no datano datano data0%no data14/14p650/6
2026-10-05no datano datano data0%no data14/14p660/6
2026-10-06no datano datano data0%no data14/14p670/6
2026-10-07no datano datano data0%no data14/14p670/6
2026-10-08no datano datano data0%no data14/14p680/6
2026-10-09no datano datano data0%no data14/14p680/6
2026-10-10no datano datano data0%no data14/14p670/6
2026-10-11no datano datano data0%no data14/14p680/6
2026-10-12no datano datano data0%no data14/14p680/6
2026-10-13no datano datano data0%no data14/14p680/6
2026-10-14no datano datano data0%no data14/14p680/6
2026-10-15no datano datano data0%no data14/14p680/6
2026-10-16no datano datano data0%no data14/14p690/6
2026-10-17*no datano datano data0%no data14/14p690/6

Alternatives in Finance

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5 of 108 other ranked services in Finance, ordered by the same measured score.

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