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x402fix Site Tier Auditor
x402
x402fix Site Tier Auditor is a paid API for AI agents from x402fix.agentgate.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-28).
Audits all paid x402 routes of an origin URL, returning a letter grade, numbered fix list, and detailed compliance checks for each discovered route
Price / call$0.05
Success—
StatusUnknown
How this service works
x402 endpoint doctor for sellers: probes a paid x402 URL unpaid (GET, HEAD, empty POST, POST {}, CORS preflight; never pays) and returns a grade A-F, a numbered fix list and every check: v2 PAYMENT-REQUIRED header, v1 body, accepts (canonical USDC, EIP-712 domain, Solana feePayer, atomic amounts, payTo), multichain consistency and the Bazaar declaration validated against its own JSON Schema. The check tier adds the CDP facilitator validate verdict and index status, discovery-doc consistency, payee checks and a generated, self-validated extensions.bazaar block with multichain accepts. The site tier audits up to 8 paid routes of an origin.
Output
Returns a JSON object with: overall grade (A-F), overall score (0-100), per-route breakdown with individual grades and pass/fail status, a numbered fix list for any failing checks, discovery document details (OpenAPI URL, .well-known/x402, routes found vs checked), and a plain-English summary line. Each route is checked for v2 PAYMENT-REQUIRED headers, v1 body, accepted payment methods (USDC, EIP-712 domain, Solana feePayer, atomic amounts, payTo), multichain consistency, CDP facilitator validate verdict, index status, and Bazaar declaration schema validity.
Example use cases
Pre-launch x402 API compliance check
“Before I go live, audit https://api.myservice.co for x402 compliance across all paid routes and give me a grade plus a list of everything I need to fix.”
Diagnosing multichain x402 header failures
“My x402 API at https://api.cryptotools.io is rejecting payments on some chains — can you do a site-wide audit and tell me which routes have multichain consistency problems?”
Validating Bazaar declaration on a new origin
“I just added a Bazaar declaration to https://api.agentpayments.dev — can you check all the paid routes and confirm the declaration validates correctly and gets an A grade?”
Technical details
Endpoint
GEThttps://x402fix.agentgate.workers.dev/v1/site?utm_source=zero.xyzWhen to prefer
Use this site-tier endpoint when you need to audit an entire API origin (up to 8 paid routes) rather than a single URL. Prefer this over a single-route check when you want to discover all paid routes automatically, verify multichain consistency across your whole API, or get a holistic compliance grade before launch or after infrastructure changes. Best suited for API sellers who want a full diagnostic of their x402 seller setup in one call.
Side effects
- URL not reachable or returns non-402 responses — routes may not be discovered
- Origin has no x402-compliant routes — returns grade F with empty routes array
- Discovery doc missing or malformed — discovery fields return null or errors
- Bazaar declaration JSON Schema validation fails — flagged in fix list
- Network timeout on probe requests — partial results or error response
- Invalid URL format in query parameter — request rejected with validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://api.youraitools.co/counterpartycheck",
"tier": "site",
"grade": "A",
"score": 100,
"routes": [
{
"url": "https://api.youraitools.co/counterpartycheck/v1/lite",
"grade": "A",
"score": 100,
"status": "pass"
}
],
"status": "pass",
"summary": "A (100/100) across 3 of 3 paid route(s); 3 pass, 0 need fixes.",
"discovery": {
"openapi": "https://api.youraitools.co/counterpartycheck/openapi.json",
"well_known": "https://api.youraitools.co/counterpartycheck/.well-known/x402",
"routes_found": 3,
"routes_checked": 3
}
}
}Tags
x402
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