Public API Directory

Claude models for text, code, vision and tool use, with prompt caching and batch processing.

GPT models for text, images, audio and embeddings.

Gemini multimodal models through Google AI Studio, with a free tier for experimentation.

Open-weight and commercial models from Mistral for chat, code and embeddings.

Command models, embeddings and reranking aimed at enterprise search and RAG.

Run thousands of open models through one API routed to multiple inference providers.

Run open-source image, video, audio and language models with pay-per-second pricing.

Text-to-speech, voice cloning and speech-to-text in many languages.

Fast speech-to-text and text-to-speech for real-time and batch audio.

Speech-to-text with speaker labels, summaries and audio intelligence features.

Payments, subscriptions, invoicing and payouts with excellent developer tooling.

Checkout, payouts, subscriptions and invoicing through PayPal.

Payments, point of sale, catalog and customer management for in-person and online sellers.

Merchant-of-record checkout, subscriptions and license keys for digital products.

Merchant-of-record billing for SaaS, handling global tax and subscriptions.

Enterprise payment processing across online, mobile and in-store channels.

SMS, voice, WhatsApp and verification APIs.

Transactional and marketing email delivery from Twilio.

Developer-first email API with React Email support.

Transactional email focused on fast, reliable inbox delivery.

Email sending, receiving and validation APIs.

Transactional email, SMS and marketing contacts with a generous free plan.

SMS, voice, video and verification APIs.

Post messages, build bots and automate Slack workspaces.

Bots, slash commands and webhooks for Discord communities.

HTTP interface for building Telegram bots.

Open-source weather forecasts and historical data with no key required for non-commercial use.

Current weather, forecasts, air pollution and historical data.

Official US forecasts, alerts and observations from NOAA.

Forecasts, history, astronomy and time-zone data in one JSON API.

Hyperlocal weather forecasts and weather-based alerts.

Geocoding and reverse geocoding on OpenStreetMap data (strict fair-use policy).

Maps, geocoding, directions and isochrones.

Maps, Places, Routes and Geocoding from Google.

Open-source routing engine you can self-host on OpenStreetMap data.

Place names, postal codes and time zones (CC-BY licensed).

Country names, codes, currencies, languages and flags.

IP geolocation, ASN and privacy detection.

Open-source exchange rates API based on European Central Bank reference rates.

Official European Central Bank statistics, including exchange rates.

Hundreds of thousands of US and international economic time series.

Development indicators for every country, from GDP to education.

Stock, forex, crypto and technical-indicator data.

Crypto prices, market caps and exchange data.

US public company filings and XBRL financial data.

Repositories, issues, pull requests, actions and more.

Projects, merge requests, pipelines and registries.

DNS, Workers, Pages, R2 and security settings.

Deployments, projects, domains and environment variables.

Errors, releases and performance data from Sentry.

Package metadata and download counts from the npm registry.

Fake REST API for prototyping and testing front ends.

Echo and inspect HTTP requests while debugging clients.

High-quality free photos with attribution requirements.

Free stock photos and videos.

Movie and TV metadata, images and credits.

Books, authors, covers and ISBN lookups from the Internet Archive.

Query and edit Wikipedia and other MediaWiki sites.

Astronomy Picture of the Day, Mars rover photos, near-Earth objects and more.

Search videos, manage playlists and read channel statistics.

Music catalog, playlists and playback control.

Search and embed GIFs and stickers.

Nutrient data for foods and branded products (public domain).

Drug, device and food adverse events, labels and recalls.

One key for many US federal agency APIs.

Public holidays for 100+ countries.

Worldwide holidays including observances.

US consumer product recall data.

UK company profiles, officers and filing history.

Shipping rates, labels, tracking and address verification across carriers.

Multi-carrier shipping labels, rates and tracking.

Shipping labels, rates and tracking for 200+ carriers.

Parcel tracking and delivery notifications across 1,000+ carriers.

Read and write Notion pages, databases and blocks.

Records, bases and webhooks for Airtable.

Read, write and format Google Sheets.

Boards, lists and cards automation.

Scheduled events, invitees and webhooks.

Meetings, webinars, recordings and users.

Independent web search index with web, news and image results.

Neural web search and content retrieval built for AI applications.

Search API optimized for LLM agents and RAG.

Structured search engine results from Google and others.

Hosted search and discovery for sites and apps.

Users, roles, connections and tenant settings for Auth0.

Users, sessions and organizations for apps using Clerk.

Check accounts against breaches; the Pwned Passwords range API is free.