{
  "x402Version": 2,
  "id": 7697,
  "slug": "7697",
  "resource": "https://fractalai.net.co/api/x402/verify-proof",
  "description": "Pay-per-Verify: an agent pays $0.01 to verify a post-quantum (ML-DSA-65 / Dilithium-3 or Dilithium-2, NIST FIPS 204; scheme auto-detected by size) signature over a message against a public key. A generic machine-to-machine PQC proof primitive for autonomous agents. x402-native.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xC13789e82661635d9Cea38a53A0390CF9939ef4f",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xC13789e82661635d9Cea38a53A0390CF9939ef4f",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "body": {
        "message_b64": "BASE64_BYTES",
        "public_key": "BASE64_PK",
        "signature": "BASE64_SIG"
      },
      "bodyType": "json",
      "description": "Pay-per-Verify: an agent pays $0.01 to verify a post-quantum (ML-DSA-65 / Dilithium-3 or Dilithium-2, NIST FIPS 204; scheme auto-detected by size) signature over a message against a public key. A generic machine-to-machine PQC proof primitive for autonomous agents. x402-native.",
      "info": {
        "input": {
          "body": {
            "message_b64": "BASE64_BYTES",
            "public_key": "BASE64_PK",
            "signature": "BASE64_SIG"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "algorithm": "ml-dsa-65",
            "valid": true,
            "verified_algorithm": "dilithium2"
          },
          "type": "json"
        }
      },
      "method": "POST",
      "output": {
        "example": {
          "algorithm": "ml-dsa-65",
          "valid": true,
          "verified_algorithm": "dilithium2"
        },
        "schema": {
          "properties": {
            "algorithm": {
              "description": "ml-dsa-65 — algorithm of THIS route's attestation signature over the verdict (NOT necessarily the client input scheme; see verified_algorithm).",
              "type": "string"
            },
            "algorithm_label": {
              "description": "ML-DSA-65 / Dilithium-3 (NIST FIPS 204)",
              "type": "string"
            },
            "attestation_digest": {
              "description": "sha256 hex over JSON({valid, verified_algorithm, message_b64, message_hash, signature: input_signature, public_key: input_public_key}) — reconstructible from this response.",
              "type": "string"
            },
            "input_public_key": {
              "description": "The exact base64 client public key that was verified (echoed for attestation_digest reconstruction).",
              "type": "string"
            },
            "input_signature": {
              "description": "The exact base64 client signature that was verified (echoed so a third party can recompute attestation_digest from this response alone).",
              "type": "string"
            },
            "message_b64": {
              "description": "The exact base64 bytes that were verified (echoed for reproducibility).",
              "type": "string"
            },
            "payment": {
              "description": "Settlement receipt (scheme, network, asset, txHash, payer, settled).",
              "type": "object"
            },
            "public_key": {
              "description": "Base64 ML-DSA-65 public key (1952 bytes) that verifies the attestation signature. Null if the served signer was unavailable.",
              "type": "string"
            },
            "served_signature_error": {
              "description": "Present only if the served attestation signer failed; the verdict is still authoritative and paid.",
              "type": "string"
            },
            "signature": {
              "description": "Base64 ML-DSA-65 / Dilithium-3 (NIST FIPS 204) signature (3309 bytes) by this server over the EXACT bytes echoed in `signed_message` = FRACTALAI-x402-served-v1\\nx402-verify-proof\\n<attestation_digest> (route-separated, 3 lines), attesting the verdict. Verify offline: ml_dsa65.verify(b64(signature), utf8(signed_message), b64(public_key)). Null (with served_signature_error) if the served signer was momentarily unavailable — the paid verdict is still served.",
              "type": "string"
            },
            "signed_message": {
              "description": "The EXACT UTF-8 bytes the served signature covers (FRACTALAI-x402-served-v1\\nx402-verify-proof\\n<attestation_digest>). Pass verbatim to ml_dsa65.verify — do not reconstruct it yourself.",
              "type": "string"
            },
            "valid": {
              "description": "True iff the supplied client signature (ML-DSA-65 or Dilithium-2, auto-detected) is valid over the message for the public key.",
              "type": "boolean"
            },
            "verified_algorithm": {
              "description": "The DETECTED scheme of the CLIENT input signature that was verified: ml-dsa-65 or dilithium2.",
              "type": "string"
            },
            "verified_algorithm_label": {
              "description": "Human label of verified_algorithm, e.g. \"ML-DSA-65 / Dilithium-3 (NIST FIPS 204)\" or \"Dilithium-2 (NIST FIPS 204)\".",
              "type": "string"
            }
          },
          "required": [
            "valid",
            "algorithm",
            "verified_algorithm",
            "input_signature",
            "input_public_key"
          ],
          "type": "object"
        },
        "type": "json"
      },
      "route_key": "POST /api/x402/verify-proof",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "type": "object"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "headers": {
                "additionalProperties": {
                  "type": "string"
                },
                "type": "object"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "queryParams": {
                "additionalProperties": {
                  "type": "string"
                },
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      },
      "serviceName": "FractalAI Verify",
      "tags": [
        "verify",
        "signature",
        "post-quantum",
        "primitive",
        "ml-dsa-65"
      ],
      "type": "http"
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "fractalai.net.co",
  "lastUpdated": "2026-09-15T16:14:33.639Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-15T16:14:33.228Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "fractalai.net.co",
    "manifest_name": "fractalai.net.co",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}