API Directory

Browse the open API ecosystem.

One catalog. 351 free, public, and developer-ready APIs.

351

APIs

63

Providers

17,078

Endpoints

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Curated

Hand-picked starting points.

Public APIs you can hit without a key
Zero-setup endpoints for prototypes, demos, and weekend hacks.
12 APIs
Generous free tiers that don't expire
APIs whose free plan is actually usable in production, not a 7-day trial.
8 APIs
Build payments end-to-end
Authorize, capture, settle, refund — and detect fraud along the way.
11 APIs
AI APIs every product touches
The text, vision, and embedding APIs that show up in most modern apps.
12 APIs
Geocoding, routing, tiles
Turn addresses into coordinates and coordinates into directions.
9 APIs
Sign-in, MFA, KYC
The identity primitives that gate most B2B and fintech surfaces.
6 APIs
Ship a side project this weekend
High-quality APIs you can ship against without a billing call.
10 APIs

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Most prolific providers.

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What people are using most.