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neo x402-lint
x402
neo x402-lint is a paid API for AI agents from neo-collettive.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Lints an x402 payment-required endpoint by checking body vs header field consistency, EIP-55 address checksums, and method conflicts — returning a signed, logged findings report.
Price / call$0.01
Success—
StatusUnknown
How this service works
Lint a seller's unpaid 402: body vs PAYMENT-REQUIRED header fields, EIP-55 checksums, method conflicts. One unpaid read, never pays. Signed, logged result.
Output
A JSON object containing: an error count (integer), a findings array listing each detected issue (field name, issue type, description), and a cryptographic signature over the result for audit trail purposes. The endpoint makes one read-only fetch of the target URL without paying, so the seller's gate is never triggered.
Example use cases
Pre-launch x402 endpoint audit
“Before I go live, can you lint my x402 seller endpoint at https://api.myservice.com/gated-report using GET and flag any header vs body mismatches or checksum errors?”
Debugging a malformed 402 response
“My x402 endpoint at https://payments.example.com/data is rejecting clients unexpectedly — can you lint it with a POST check and give me a signed findings report so I can see what's wrong?”
Verifying x402 compliance before marketplace listing
“I want to list my endpoint on an x402 marketplace — can you lint https://neo-api.example.com/content via GET and confirm there are no EIP-55 or method conflict issues?”
Technical details
Endpoint
POSThttps://neo-collettive.onrender.com/x402/x402-lint?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a signed, logged audit of an x402 payment-required endpoint's correctness — specifically for catching EIP-55 checksum errors, header/body field mismatches, and GET/POST method conflicts. Prefer it over manual inspection or generic HTTP debuggers when you need a verifiable, cryptographically signed report suitable for marketplace listings or compliance records.
Side effects
- Target URL is unreachable or times out — returns an error indicating the endpoint could not be fetched
- Target URL does not return a 402 response — findings may be empty or indicate missing payment-required headers
- Invalid URL format in request body — returns a validation error
- Method enum value outside GET/POST — rejected by schema validation
- Target endpoint behind SSRF-protected network — may return access-denied or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| method | string |
Output
Schema · Response
{
"type": "json",
"example": {
"errors": 0,
"findings": [],
"signature": "..."
}
}Tags
x402
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