x402station.io API reference

Provider verification certificate

Provider-side audit that mints a 30-day signed certificate and public badge for one endpoint or supported pattern.

This HTML page is served by GET /api/v1/verified. The paid API operation remains POST /api/v1/verified.

Signature
POST /api/v1/verified

Pricing
$1 USDC

Settlement
x402 v2 · exact · Base mainnet USDC

Canonical
https://x402station.io/api/v1/verified

x402 challenge example

HTTP/1.1 402 Payment Required
payment-required: <base64 PaymentRequiredResponse>
www-authenticate: x402
content-type: application/json; charset=utf-8

{
  "x402Version": 2,
  "error": "Payment required",
  "resource": {
    "url": "https://x402station.io/api/v1/verified",
    "description": "Provider verification certificate"
  },
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "asset": "USDC",
      "amount": "1000000",
      "payTo": "0x4053338C7cB38624C0bc23c900F78Cf8470b4E38",
      "maxTimeoutSeconds": 300
    }
  ]
}

Request body

{
  "url": "https://api.example.com/x402-endpoint",
  "name": "Example API"
}

Success response

{
  "certId": "ver_123",
  "verified": true,
  "tier": "verified",
  "badgeUrl": "https://x402station.io/verified/ver_123/badge.svg",
  "pageUrl": "https://x402station.io/verified/ver_123",
  "validUntil": "2026-07-12T00:00:00.000Z"
}

Error codes

status	meaning
`400`	Malformed JSON body, invalid URL, or missing required field.
`402`	Payment required. Decode payment-required, sign x402, retry.
`503`	Query/probe pipeline timeout. Treat as failed preflight; do not pay target blindly.
`422`	Endpoint did not meet verification criteria; certificate may be not_verified.

Notes