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mirrored listing x402 eip155:8453

Signed settlement attestation: we make a REAL x402 purchase from your target endpoint (up

Signed settlement attestation: we make a REAL x402 purchase from your target endpoint (up to $0.1), grade the delivered response against its advertised schema, and return an EIP-191-signed attestation embedding the on-chain USDC receipt. Proof-of-real-delivery for directories, reputation systems and sellers.

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Claim this listing
250000 (raw units)
price
2
calls / 30d
1
unique payers
2026-09-18
updated

Provider

numberintel.dev · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x9A8dfBE7A11ee89dD59D80c93AB0EfE00D5D5767",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "250000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "max_spend_usd": 0.05,
          "method": "GET",
          "target": "https://api.example.com/v1/data"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "attestation": {
            "attestor": "0x3708...9234",
            "delivery": {
              "http_status": 200,
              "is_json": true,
              "paid_latency_ms": 900,
              "schema_match_ratio": 1,
              "sha256": "..."
            },
            "grade": "delivered",
            "id": "a1b2c3d4e5f60718",
            "purchase": {
              "quote_usd": 0.01,
              "receipt": {
                "network": "eip155:8453",
                "transaction": "0x..."
              },
              "settled": true
            },
            "target": "https://api.example.com/v1/data",
            "version": 1
          },
          "signature": "0x..."
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "body": {
                  "description": "JSON body for POST targets",
                  "type": "object"
                },
                "max_spend_usd": {
                  "description": "cap on target spend, hard max 0.1",
                  "type": "number"
                },
                "method": {
                  "description": "GET or POST",
                  "type": "string"
                },
                "target": {
                  "description": "https URL of the x402 endpoint to buy from",
                  "type": "string"
                }
              },
              "required": [
                "target"
              ],
              "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": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://numberintel.dev/v1/attest"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://numberintel.dev/v1/attest");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://numberintel.dev/v1/attest")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/12378.json, and this resource appears in /discovery/resources and /discovery/search.