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OpenAPI Specification

Describe an HTTP API with a machine-readable contract covering operations, inputs, responses and security requirements.

Provider: OpenAPI Initiative. Editorial listing by Gateway; not an owner claim.

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Best suited to
Giving agents an accurate API contract
Owner next step
Document your actual public API and validate a supported specification version before sharing it with directories or agents.
Access
Public specification
Cost
Free. Free public specification; API implementation, hosting and service execution have separate costs.
Interfaces
Website · OpenAPI
Source evidence
Official public source · checked 2026-10-01. This is a description review, not an execution or compatibility test.
Traffic and availability
Not monitored. Bot visits, citations, uptime and successful delivery have not been measured by this directory.

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