Open Source · Free Forever · Community Driven

The API catalog for AI agent builders

800+ production-ready APIs organized into 15 capability groups. Build your agent's toolkit visually, or query our free API to let your agents discover their own tools.

Open Agent Builder View API Docs

792

APIs cataloged

105

Categories

15

Capability groups

Free

Forever

Discover

Browse 800+ APIs organized into human-friendly groups like Brain, Eyes, Voice, and Money. No jargon.

Build

Assemble your agent's toolkit visually. See compatibility scores, cost estimates, and synergies in real time.

Contribute

Open source and community-driven. Submit new APIs, fix descriptions, or improve categorization via GitHub.

Free API for agents

Let your agents discover their own tools. No auth required.

Search APIs

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GET /api/search?q=payments+africa

Find APIs by keyword across all categories

Browse Categories

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GET /api/categories

List all capability groups and subcategories

Get Recommendations

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GET /api/recommend?goal=voice+agent+that+takes+payments

AI-friendly endpoint that suggests a tool stack for any goal