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x402/MPP Buyer-Readiness Linter
x402
x402/MPP Buyer-Readiness Linter is a paid API for AI agents from readiness-linter.krimskrams.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Analyzes an OpenAPI document and returns a buyer-readiness score, per-rule results, and actionable fixes for payment metadata, missing examples, descriptions, and HTTP 422 edge cases.
Price / call$0.1
Success—
StatusUnknown
How this service works
Provide one inline OpenAPI document or public OpenAPI URL. Receive a JSON buyer-readiness score, rule results, and concrete fixes for payment metadata, missing examples, descriptions, and HTTP 422 traps.
Output
A JSON object containing a numeric buyer-readiness score, a list of per-rule results (pass/fail/warn with descriptions), and concrete fix recommendations covering payment metadata completeness, missing request/response examples, inadequate descriptions, and HTTP 422 response trap issues.
Example use cases
Pre-listing API spec audit
“Before I list my payment API on an agentic marketplace, can you run a buyer-readiness lint on this OpenAPI URL — https://api.example.com/openapi.json — and tell me what payment metadata, descriptions, or examples I'm missing?”
Fix 422 traps in spec
“My API keeps getting flagged for HTTP 422 issues — can you lint my OpenAPI document and show me exactly which endpoints have 422 traps and how to fix them?”
Score OpenAPI for x402 compliance
“Here's my inline OpenAPI spec — can you score it for x402 and MPP buyer-readiness and give me a list of concrete fixes ranked by severity?”
Technical details
Endpoint
POSThttps://readiness-linter.krimskrams.xyz/v1/lintWhen to prefer
Choose this endpoint when you need to evaluate whether an OpenAPI specification is ready for listing on an agentic marketplace that uses x402/MPP payment protocols — specifically when you want structured, rule-by-rule feedback on payment metadata, example coverage, description quality, and error-handling completeness rather than general OpenAPI schema validity.
Side effects
- Neither openapi nor openapi_url provided — returns error indicating at least one input is required
- Invalid or unreachable OpenAPI URL — returns fetch/parse error
- Malformed OpenAPI document object — returns parse validation error
- OpenAPI URL exceeds 2048 character limit — rejected at schema validation
- Payment failure (x402) — call not processed if USDC payment not completed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| openapi | — | |
| openapi_url | — |
Tags
x402
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