Api Endpoint

numberintel.dev

Quote only: send this request as a JSON POST. 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.

Open interactive test console

Offering

Provider: numberintel.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://numberintel.dev/v1/attest
MIME type: application/json
First seen: 2026-10-16T02:20:04.240Z
Last seen: 2026-11-04T21:36:48.591Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.25 USDC
Atomic price: 250000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

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

Observed health

Status: Healthy
Latest latency: 229 ms
Average latency: 511 ms
HTTP status: 402
Last checked: 2026-11-04T21:36:48.586Z
Reachability: 100% over 15 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{}

Output schema

null