OpenAPI.city

What you can do

Feature Endpoint Description Search APIsGET /api/v1/providers/search?q= Full-text search across all providers List providersGET /api/v1/providers Paginated index of all API providers Provider detailsGET /api/v1/providers/:slug Metadata, version info Full specGET /api/v1/providers/:slug/spec Complete OpenAPI specification EndpointsGET /api/v1/providers/:slug/endpoints All endpoints for a provider Single endpointGET /api/v1/providers/:slug/endpoints/:method/*path Detailed endpoint info SchemasGET /api/v1/providers/:slug/schemas/:name Schema definitions SummaryGET /api/v1/providers/:slug/summary Generated spec summary Auth requirementsGET /api/v1/providers/:slug/auth Authentication schemes Resolve URLPOST /api/v1/resolve Ingest a new spec by URL

Two integration paths

• REST API — standard HTTP requests, ideal for scripts, backends, and tools

• MCP Server — native integration with AI coding assistants (Cursor, Claude Code, Windsurf)

Next: Authentication →

Getting Started

Welcome to openapi.city — structured OpenAPI specifications for AI agents and developers. Search, browse, and query thousands of public API specs via REST API or MCP.

Quick Start

Option A: Agent Signup (Recommended)

Tell your AI agent:

Sign up for openapi.city. Read https://openapi.city/signup.md for instructions.

Your agent will:

• Ask for your email

• Create your account and get an API key

• Configure MCP integration automatically

• You confirm via email to activate

Option B: Manual Signup

1. Sign up at openapi.city/dashboard and create an account.

2. Generate an API key from the API Keys page.

3. Make your first request:

curl -H "Authorization: Bearer oac_live_YOUR_KEY_HERE" \
 https://openapi.city/api/v1/providers/search?q=stripe

4. Browse the response:

{
 "results": [
 {
 "slug": "stripe",
 "name": "Stripe",
 "description": "Online payment processing for internet businesses",
 "category": "payments",
 "endpoint_count": 243
 }
 ],
 "endpoint_matches": [],
 "meta": { "page": 1, "per_page": 25, "total": 1, "total_pages": 1 }
}