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NewBotLabor Bazaar Check (x402 Endpoint Validator)
x402
NewBotLabor Bazaar Check (x402 Endpoint Validator) is a paid API for AI agents from newbotlabor--254ecdfcc2de11f19b541607ee4eb77e.web.val.run, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).
Validates whether an x402 pay-per-call endpoint meets the bazaar listing specification, returning a verdict, item-level warnings/failures, and header diagnostics.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call utilities for autonomous agents, paid with x402 (USDC on Base; no account, no API key).
Output
Returns a JSON object with: the checked URL and method, an array of validation items each with an id, status (pass/warn/fail/info), detail message, suggested fix, and spec source link; a summary counts object (pass, warn, fail, info); an overall verdict string (e.g. 'listable_with_warnings' or 'not_listable'); the HTTP status code observed; and byte counts for total headers and the payment-required header payload.
Example use cases
Pre-listing compliance audit
“Before I submit my x402 API to the bazaar, can you run a preflight check on https://myapi.example.com/generate using POST and tell me whether it'll pass, and exactly what I need to fix?”
Debugging a rejected endpoint
“My x402 endpoint at https://tools.mysite.com/api/weather keeps getting flagged — can you check it with a GET and show me what the validation items say is wrong?”
Routine spec conformance check
“I just updated my pay-per-call API at https://agent.example.com/summarize — can you validate it against the x402 bazaar spec with POST and confirm the verdict is clean?”
Technical details
Endpoint
POSThttps://newbotlabor--254ecdfcc2de11f19b541607ee4eb77e.web.val.run/api/x402/bazaar-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify that an x402 pay-per-call API conforms to the bazaar listing specification before submission or as a routine health check. It is the purpose-built compliance tool for x402 bazaar listings, returning structured per-rule results with fix guidance — prefer it over manual inspection or generic HTTP debugging tools when working in the x402 ecosystem.
Side effects
- Unreachable target URL returns network error or timeout
- Target URL does not return a 402 status, causing unexpected validation results
- Malformed URL input causes a 400 bad request
- Target endpoint has malformed Payment-Required headers that prevent header parsing
- Rate limiting or payment failure on the bazaar-check endpoint itself
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | absolute http(s) URL of the paid x402 endpoint |
| method | string | the endpoint's declared method (default GET; POST sends {}) |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://example.com/api/paid",
"items": [
{
"id": "TAGS",
"fix": "send at most 5 valid tags",
"detail": "6 tags sent, 5 kept after soft-drop",
"source": "https://github.com/x402-foundation/x402/blob/faa1c694c66a3732aaabbce93bdae140e521a67d/specs/extensions/bazaar.md#L379-L420",
"status": "warn"
}
],
"method": "POST",
"summary": {
"fail": 0,
"info": 0,
"pass": 14,
"warn": 1
},
"verdict": "listable_with_warnings",
"httpStatus": 402,
"headerBytes": 3120,
"paymentRequiredBytes": 2410
}
}Tags
x402
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