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Catch OpenAPI API-contract inconsistencies before integration.

Paste an OpenAPI JSON document. Inspect exact endpoints, duplicate operation IDs, path parameters, unresolved local references and security declarations.

Your document is processed in this browser. It is not uploaded or stored. External references and endpoint URLs are never fetched. Use synthetic or redacted data.

OpenAPI 3.0.x or 3.1.x JSON — maximum 64 KiB

What this check establishes

OpenAPI 3.0 structure uses the open-source OpenAPI schema. OpenAPI 3.1 receives selected coherence checks only; JSON Schema 2020-12 is not fully validated. A security declaration describes a contract and does not prove that your server enforces it. Referenced path items are reported but not expanded. This is not legal-contract analysis, a runtime test, security audit or certification.

Read the prepaid API guide Automate signed checks — €0.010 per check

The prepaid API returns signed contract consistency reports, supplied-offer comparisons and idempotent request identifiers. Choose a budget from €10 to €10,000 including applicable taxes; each contract check uses €0.010 of the shared tax-exclusive balance. No subscription or automatic renewal. Save the reports yourself: they are not archived by this budget. Review the endpoint and access code.

Uses jsonschema 1.5.0 and OpenAPI Schemas 2.1.0, MIT licences. Also try Registration Check and Receipt Check.