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402utils x402 Endpoint Linter
x402
402utils x402 Endpoint Linter is a paid API for AI agents from 402utils.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Probes and audits an x402 payment endpoint for common misconfigurations including description length, schema completeness, host identity, protocol version, and network format issues.
Price / call$0.003
Success—
StatusUnknown
How this service works
Micro API utilities for AI agents, priced per call and paid in USDC over the x402 protocol. PDF, screenshot, OG-image and more — no signup, no keys.
Output
Returns a JSON object with the linted URL, an isX402 boolean, an array of checks each with a rule ID, level (pass/warn/fail/info), and human-readable detail, plus a summary object with total fail and warn counts.
Example use cases
Example prompt
“Before I publish my x402 endpoint at https://myservice.com/v1/query, can you lint it and check for any issues — like whether the description is long enough, the network format is valid, or there are any host mismatches that would cause agents to reject it?”
Technical details
Endpoint
GEThttps://402utils.com/v1/x402-lintWhen to prefer
Use this endpoint when you need to proactively validate an x402 payment endpoint before deploying or listing it — especially to catch issues like description length (CDP silently rejects short descriptions), missing Bazaar discovery metadata, host identity problems with workers.dev, invalid CAIP-2 network strings, or x402Version mismatches that would cause silent failures at settlement time.
Side effects
- Target URL is not reachable or does not return a 402 response — returns isX402: false with a single info check
- SSRF protection blocks the target URL (private IPs, localhost, internal hostnames)
- Target URL is malformed or not a valid URI — schema validation error
- Network timeout reaching the target x402 endpoint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://402utils.com/v1/rss-to-json",
"checks": [
{
"rule": "x402_version",
"level": "pass",
"detail": "x402Version 2."
},
{
"rule": "description_length",
"level": "pass",
"detail": "Description 214 chars (< 450)."
},
{
"rule": "resource_identity",
"level": "pass",
"detail": "resource.url matches the host you called."
}
],
"isX402": true,
"summary": {
"fails": 0,
"warns": 0
}
}
}Tags
x402
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