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Quartermaster x402 Endpoint Auditor
x402
Quartermaster x402 Endpoint Auditor is a paid API for AI agents from quartermaster.surewhynot.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Audits an x402-enabled paid endpoint for protocol compliance, scoring its 402 challenge, payment fields, Bazaar discovery metadata, and discovery surfaces with a 0-100 score and actionable fixes.
Price / call$0.01
Success—
StatusUnknown
How this service works
Full x402 endpoint audit: verifies the 402 challenge, payment fields, Bazaar discovery metadata, and the origin's discovery surfaces (llms.txt, openapi.json, .well-known/x402, discovery/resources), returning a 0-100 score, pass/warn/fail checks with evidence, and recommended fixes.
Output
Returns a 0-100 compliance score, a list of pass/warn/fail checks with evidence for each (covering the 402 challenge, payment fields, Bazaar discovery metadata, and discovery surfaces including llms.txt, openapi.json, .well-known/x402, and discovery/resources), plus recommended fixes for any failing checks.
Example use cases
Diagnose failing x402 payment fields
“My paid API at https://api.myservice.com/data/premium keeps getting rejected by x402 clients — can you run a compliance audit and tell me exactly which payment fields are wrong and how to fix them?”
Pre-launch Bazaar listing check
“I'm about to submit my endpoint at https://api.acme.io/v1/reports to the Bazaar — audit it first and let me know if my discovery surfaces like llms.txt and .well-known/x402 are all set up correctly so I don't get rejected.”
Score competitor x402 implementation
“Can you audit the x402 endpoint at https://api.thirdparty.dev/v1/analytics and give me a full compliance score? I want to see how well their 402 challenge and discovery metadata hold up against the protocol spec.”
Technical details
Endpoint
GEThttps://quartermaster.surewhynot.app/v1/x402-auditWhen to prefer
Use this endpoint when you need a comprehensive, multi-dimensional compliance report for an x402 paid endpoint — covering the full protocol stack including 402 challenge format, payment fields, Bazaar discovery metadata, and all standard discovery surfaces. Prefer this over manual inspection or partial checks when you want a single scored report with actionable fixes.
Side effects
- Target URL is not reachable or returns unexpected status codes
- Target URL does not implement x402 at all, resulting in low/zero score
- Malformed URL input causes validation error
- Discovery surfaces (llms.txt, openapi.json, etc.) are inaccessible or return errors
- Network timeout when probing the target endpoint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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