APIs.guru MCP Server

APIs.guru

APIs.guru is a directory of OpenAPI specs. No auth. Browse providers and services; fetch OpenAPI JSON for any API.

Data Model

• Directory — browse or search the full OpenAPI corpus; metrics endpoints summarize corpus health.
• Providers — vendors (e.g. adyen.com) exposing one or more APIs; composite keys look like provider:service.
• Services — multi-surface vendors publish separate service names and versions; each maps to downloadable OpenAPI JSON.
• Specifications — raw OpenAPI documents keyed either by (provider, apiVersion) tuples or fully qualified provider:serviceName/version strings.

Gotchas

• No auth: Public API. No credentials needed.
• Composite keys: When fetching a spec, combine the provider slug with the version label shown beside each API entry.
• Service URIs: Multi-service providers need the provider:serviceName/version pattern, where the version segment mirrors the api_link metadata on the provider card.