{
  "x402Version": 2,
  "id": 2470,
  "slug": "2470",
  "resource": "https://www.tereno.xyz/api/v1/x402/assurance/invoke",
  "description": "Verify and monitor a third-party x402 endpoint without paying it. Probe the live 402 challenge and check conformance: price, payTo, network, scheme, schema and example quality, whether its own advertised input still reaches a challenge, and whether its description fits the facilitator limit that silently blocks settlement. Then get availability history and a field-level diff since the last observation. Optional recomputation against Base.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xfbF218ACCBb0D57fc4E8fc3E2A885C910c4C9e94",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "30000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "method": "GET",
            "resource": "https://www.tereno.xyz/api/v1/capabilities/chain.snapshot/invoke"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "assurance": "conformant",
            "capabilityId": "x402.endpoint.assurance",
            "capabilityVersion": "2026-09-07",
            "pricing": {
              "currency": "USDC",
              "pricePaidUsd": 0.03
            },
            "receiptUrl": "/api/v1/x402/assurance/reports/uuid",
            "report": {
              "challenge": {
                "decodable": true,
                "descriptionChars": 231,
                "discoverable": true,
                "hasInputSchema": true,
                "hasOutputExample": true,
                "network": "eip155:8453",
                "payTo": "0x1111111111111111111111111111111111111111",
                "priceUsd": 0.01,
                "scheme": "exact"
              },
              "conformance": {
                "checks": [
                  {
                    "detail": "the resource answered 402 Payment Required",
                    "id": "answers_402",
                    "ok": true,
                    "severity": "blocking"
                  }
                ],
                "failed": 0,
                "level": "conformant",
                "passed": 14
              },
              "history": {
                "availabilityPct": 100,
                "changesSinceLast": [
                  {
                    "field": "priceUsd",
                    "from": "0.01",
                    "to": "0.02"
                  }
                ],
                "observations": 3
              },
              "host": "example.com",
              "limitations": [
                "Tereno never paid this endpoint."
              ],
              "method": "GET",
              "reachability": {
                "httpStatus": 402,
                "latencyMs": 214,
                "note": null,
                "status": "ok"
              },
              "resource": "https://example.com/api/paid",
              "verification": {
                "claims": [],
                "divergent": 0,
                "level": "not_verifiable",
                "matched": 0,
                "note": "No recomputable claim was supplied."
              }
            }
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "additionalProperties": false,
                "properties": {
                  "body": {
                    "description": "JSON body to send with the probe, for POST resources.",
                    "type": "object"
                  },
                  "claims": {
                    "description": "What to recompute out of observedResponse. Supported kinds: erc20.symbol, erc20.decimals, erc20.totalSupply, erc20.balanceOf, native.balance, contract.hasCode, gas.priceGwei.",
                    "items": {
                      "properties": {
                        "address": {
                          "type": "string"
                        },
                        "kind": {
                          "enum": [
                            "erc20.symbol",
                            "erc20.decimals",
                            "erc20.totalSupply",
                            "erc20.balanceOf",
                            "native.balance",
                            "contract.hasCode",
                            "gas.priceGwei"
                          ]
                        },
                        "owner": {
                          "type": "string"
                        },
                        "token": {
                          "type": "string"
                        },
                        "tolerancePct": {
                          "type": "number"
                        }
                      },
                      "required": [
                        "kind"
                      ],
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "method": {
                    "description": "How that endpoint is normally called. Defaults to GET.",
                    "enum": [
                      "GET",
                      "POST"
                    ]
                  },
                  "observedResponse": {
                    "description": "A paid response you already hold from that endpoint. Supply it to have its claims recomputed against Base.",
                    "type": "object"
                  },
                  "query": {
                    "description": "Query parameters to send with the probe.",
                    "type": "object"
                  },
                  "resource": {
                    "description": "Absolute HTTPS URL of the x402 endpoint to measure.",
                    "type": "string"
                  }
                },
                "required": [
                  "resource"
                ],
                "type": "object"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "assurance": {
                    "enum": [
                      "verified",
                      "conformant",
                      "not_verifiable",
                      "failing"
                    ]
                  },
                  "capabilityId": {
                    "const": "x402.endpoint.assurance"
                  },
                  "pricing": {
                    "type": "object"
                  },
                  "report": {
                    "type": "object"
                  }
                },
                "required": [
                  "capabilityId",
                  "assurance",
                  "report",
                  "pricing"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "builder-code": {
      "info": {
        "a": "bc_8kag0yoi"
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {
          "a": {
            "description": "App builder code",
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          },
          "s": {
            "description": "Service builder codes",
            "items": {
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "type": "array"
          },
          "w": {
            "description": "Wallet builder code",
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          }
        },
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar",
    "builder-code"
  ],
  "sourceHost": "www.tereno.xyz",
  "lastUpdated": "2026-09-07T17:39:27.752Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-07T17:39:27.568Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "www.tereno.xyz",
    "manifest_name": "www.tereno.xyz",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}