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agent402.tools OpenAPI Agent-Readiness Linter
x402
agent402.tools OpenAPI Agent-Readiness Linter is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Scores an OpenAPI 3.x or Swagger 2.x spec on LLM-agent-readiness, returning a 0–100 score, severity counts, and a structured list of violations with stable rule IDs
Price / call$0.002
Success—
StatusUnknown
How this service works
Score an OpenAPI 3.x or Swagger 2.x spec on agent-readiness - i.e. does an LLM-driven caller have what it needs to call the API correctly without guessing. Returns a 0..100 score, severity counts, and a structured list of violations with stable rule codes. Checks: documented title/servers/paths, per-operation summary/description/operationId/tags, documented 2xx + error responses, param descriptions/schemas/examples, response descriptions, JSON response schemas.
Output
Returns a 0–100 agent-readiness score, counts of violations by severity (error/warning/info), and a structured list of individual violations each with a stable rule ID, a description of the problem, and its location in the spec — giving a clear picture of what an LLM-driven caller would struggle with.
Example use cases
Example prompt
“Can you lint this OpenAPI spec for agent-readiness and tell me the score, what severity counts look like, and exactly which rules are being violated? Here's the spec: { ... }”
Technical details
Endpoint
POSThttps://agent402.tools/api/openapi-lintWhen to prefer
Use this endpoint when you need to evaluate whether an API specification is suitable for consumption by LLM-driven agents — specifically when you want a structured, rule-based score rather than a generic JSON schema validator. It is purpose-built for agent-readiness concerns (missing descriptions, ambiguous parameters, unclear response schemas) rather than general OpenAPI conformance.
Side effects
- Invalid or unparseable JSON/YAML spec returns a parse error
- Spec missing required OpenAPI/Swagger version field may be rejected
- Malformed input schema (non-object, empty body) returns a 400-level error
- Swagger 1.x or non-standard formats are not supported
- Network timeout on very large specs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| spec | — | OpenAPI/Swagger document (object or JSON string) |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"score": 97,
"counts": {
"info": 0,
"error": 0,
"warning": 1
},
"violations": [
{
"rule": "operation-missing-operationid",
"message": "Operation has no operationId - agents can't refer to this call by a stable name.",
"location": "GET /users",
"severity": "warning"
}
]
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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