{
  "x402Version": 2,
  "id": 7698,
  "slug": "7698",
  "resource": "https://fractalai.net.co/api/x402/verify-agent",
  "description": "Pay-per-KYA: an agent pays to verify another agent's post-quantum identity + scope credential (Dilithium-2, NIST FIPS 204), with a live FRC-55 on-chain reputation read. ERC-8004-aligned Know Your Agent for autonomous agent-to-agent commerce. x402-native.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xC13789e82661635d9Cea38a53A0390CF9939ef4f",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "30000",
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xC13789e82661635d9Cea38a53A0390CF9939ef4f",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "30000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "body": {
        "credential": {
          "claim": {},
          "credential_id": "…",
          "public_key": "BASE64",
          "signature": "BASE64"
        }
      },
      "bodyType": "json",
      "description": "Pay-per-KYA: an agent pays to verify another agent's post-quantum identity + scope credential (Dilithium-2, NIST FIPS 204), with a live FRC-55 on-chain reputation read. ERC-8004-aligned Know Your Agent for autonomous agent-to-agent commerce. x402-native.",
      "info": {
        "input": {
          "body": {
            "credential": {
              "claim": {},
              "credential_id": "…",
              "public_key": "BASE64",
              "signature": "BASE64"
            }
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "algorithm": "ml-dsa-65",
            "valid": true,
            "verified_credential_algorithm": "dilithium2"
          },
          "type": "json"
        }
      },
      "method": "POST",
      "output": {
        "example": {
          "algorithm": "ml-dsa-65",
          "valid": true,
          "verified_credential_algorithm": "dilithium2"
        },
        "schema": {
          "properties": {
            "algorithm": {
              "description": "ml-dsa-65 — algorithm of the served attestation signature this route produces.",
              "type": "string"
            },
            "algorithm_label": {
              "description": "ML-DSA-65 / Dilithium-3 (NIST FIPS 204).",
              "type": "string"
            },
            "attestation_digest": {
              "description": "sha256 hex of the canonical verdict that the served signature covers.",
              "type": "string"
            },
            "claim": {
              "description": "The echoed KYA claim (agent_id, operator, scope, validity window).",
              "type": "object"
            },
            "not_expired": {
              "description": "True iff the credential is still in-date.",
              "type": "boolean"
            },
            "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 served signature.",
              "type": "string"
            },
            "reason": {
              "description": "Human-readable explanation of the verdict.",
              "type": "string"
            },
            "reputation": {
              "description": "Live FRC-55 on-chain reputation snapshot, when referenced and available (else null).",
              "type": "object"
            },
            "seconds_until_expiry": {
              "description": "Seconds until expiry (negative if expired).",
              "type": "number"
            },
            "signature": {
              "description": "Base64 ML-DSA-65 / Dilithium-3 (NIST FIPS 204) signature (3309 bytes) over the 3-line message FRACTALAI-x402-served-v1\\nx402-verify-agent\\n<attestation_digest>, attesting this exact verdict.",
              "type": "string"
            },
            "signed_message": {
              "description": "The EXACT bytes the served signature covers: the 3-line FRACTALAI-x402-served-v1\\nx402-verify-agent\\n<attestation_digest>. Verify offline: ml_dsa65.verify(b64(signature), utf8(signed_message), b64(public_key)).",
              "type": "string"
            },
            "stage": {
              "description": "Which check decided the verdict: structure | credential_id | signature | expiration | ok.",
              "type": "string"
            },
            "valid": {
              "description": "True iff the post-quantum signature verifies, integrity holds, and the credential is in-date.",
              "type": "boolean"
            },
            "verified_credential_algorithm": {
              "description": "Algorithm of the INPUT credential that was verified: dilithium2 (ML-DSA-44, NIST FIPS 204).",
              "type": "string"
            }
          },
          "required": [
            "valid",
            "stage",
            "reason",
            "signature",
            "algorithm",
            "public_key"
          ],
          "type": "object"
        },
        "type": "json"
      },
      "route_key": "POST /api/x402/verify-agent",
      "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 Know-Your-Agent",
      "tags": [
        "kya",
        "agent-identity",
        "reputation",
        "erc-8004",
        "post-quantum"
      ],
      "type": "http"
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "fractalai.net.co",
  "lastUpdated": "2026-09-15T16:14:25.79Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-15T16:14:25.392Z"
  },
  "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"
  }
}