OpenAPI Directory First

Overview

Always check the APIs-guru/openapi-directory for authoritative, machine-readable API specs before relying on training data or web searches. This directory contains 2500+ public API definitions in OpenAPI format, auto-updated weekly from original sources.

Core rule: Training data goes stale. OpenAPI specs are the source of truth.

When to Use

• Writing code that calls any public REST API
• Looking up endpoint parameters, auth, request/response schemas
• Debugging API integration issues (wrong params, unexpected responses)
• Generating API client code or types
• Answering questions about how a public API works

When NOT to Use