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OpenAPI Preflight Validator
x402
OpenAPI Preflight Validator is a paid API for AI agents from nohands-coinbase-bazaar.bytoken2023.workers.dev, paid per call via x402, $0.015003/call, status unknown (last checked 2026-11-02).
Validates a public OpenAPI JSON or YAML document by checking server URLs, authentication declarations, operation coverage, and content fingerprint.
Price / call$0.015003
Success—
StatusUnknown
How this service works
Validate a public OpenAPI JSON or YAML document, server URLs, authentication declarations, operation coverage, and content fingerprint.
Output
Returns a structured validation report covering: whether the OpenAPI document is valid JSON or YAML, server URL reachability and consistency, authentication/security scheme declarations, operation coverage analysis, and a content fingerprint of the document.
Example use cases
Preflight check before agent integration
“Before my agent tries to call this new API, validate the OpenAPI spec at https://payments.example.com/openapi.yaml — I need to know if the server URL is reachable, what auth methods are declared, and whether operation coverage looks complete.”
Verifying spec quality before publishing
“I'm about to publish my API — can you validate the OpenAPI JSON at https://myservice.dev/docs/openapi.json and report back on any issues with the server URLs, missing auth declarations, or gaps in operation coverage?”
Auditing a third-party API spec
“I found a third-party API I want to integrate with. Can you do a preflight check on their OpenAPI document at https://thirdparty.io/api/openapi.json and give me a content fingerprint along with a full validity report?”
Technical details
Endpoint
GEThttps://nohands-coinbase-bazaar.bytoken2023.workers.dev/v1/x402/web/openapi-preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically pre-check an OpenAPI document before integrating with or publishing an API — especially in agentic workflows where you want to confirm server URLs, auth schemes, and operation completeness before committing to a call or payment. Prefer this over manual inspection when operating autonomously or at scale.
Side effects
- URL not publicly accessible — returns error if the OpenAPI document URL is behind auth or firewalled
- Invalid or non-OpenAPI document — returns validation failure if the URL does not point to a valid OpenAPI spec
- Malformed YAML/JSON — parse errors reported if document syntax is broken
- Server URL mismatch — flags inconsistencies between declared servers and actual reachable endpoints
- Timeout — if the remote OpenAPI document is slow to load
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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