Find the right API
Use search when the broad directory stops being enough. Filter by category, auth, CORS, signup friction, and result freshness until the shortlist becomes obvious.
Start with category and auth when you know the integration shape. Use free, signup, and CORS flags when you are trying to remove setup friction.
Sort by verification or response time when the final call is about reliability, not just category fit.
351 results in the full search view. Start narrowing from the rail when the field is still too broad.
Open Data API
UK Open Banking API is the UK's statutory banking API standard — third parties access user account data and initiate payments with user consent (PSD2 compliance).
OpenAI API
OpenAI API provides large language models (GPT-4 / o1 / o3), DALL-E image generation, Whisper speech recognition, embeddings, and other AI capabilities.
OpenSea API
OpenSea API provides data access to the world's largest NFT marketplace — collections, individual NFT details, listings, offers, transaction history, ownership.
Oxford Dictionaries
Oxford Dictionaries API provides authoritative Oxford English dictionary data — definitions, etymology, synonyms, translations (30+ languages), morphology.
PageSpeed Insights API
Analyze a page with runPagespeed and feed performance diagnostics into site quality tooling.
Particle API
Particle API is an IoT hardware platform (devices + cellular network + cloud) — programmatic device remote control, OTA firmware update, sensor data streams.
Payment Initiation API
UK Open Banking Payment Initiation API (PIS) lets authenticated third parties initiate transfers from user bank accounts with user consent (A2A payments).
PayPal API
PayPal API provides integration of the world's most recognized payment method — one-time payments, subscriptions, payouts, merchant tools, Venmo (US).
Perplexity API
Perplexity API provides web-connected LLM — automatically searches the web when answering, avoiding LLM knowledge cutoff issues.
Petfinder
Petfinder is dedicated to helping pets find homes, another resource to get pets adopted.
Pinecone API
Pinecone API is a managed vector database — store high-dimensional vectors (embeddings) for semantic search; the de-facto vector DB for RAG apps.
PlaceBear
Placeholder bear pictures.
PlaceDog
Placeholder Dog pictures
PlaceKitten
Placeholder Kitten pictures.
PlanetScale API
PlanetScale API provides Vitess-based managed MySQL — unlimited horizontal scaling, zero-downtime schema migrations, branches (DB branching like Git).
PlayCanvas API
PlayCanvas is an open-source web 3D game engine + cloud IDE — high-performance 3D / VR on WebGL, API for asset management, project publishing, collaboration.
PocketBase API
PocketBase is open-source Go single-binary BaaS (auth + DB + storage + realtime) — single-file deployment, zero ops; ultra-minimal Firebase alternative.
Polygon
Polygon.io API provides real-time and historical data for US stocks, forex, and crypto — quotes, candles, earnings, news, technical indicators.
Prisma Data Platform API
Prisma Data Platform API includes Prisma Accelerate (global connection pool + cache) and Prisma Pulse (DB real-time event streams) — enhances any Postgres / MySQL DB.
Qdrant API
Qdrant is an open-source vector database written in Rust — excellent performance (Rust-based), clean API, growing ecosystem; main open-source alternative to Pinecone.
Radio & Music Services
BBC Radio & Music Services exposes broadcasts, categories, collections, podcasts, and popular music resources.
Railway API
Railway is a simplified cloud deployment platform — git push auto-deploys any Dockerfile / Node / Python apps, with one-click Postgres / Redis / MongoDB provisioning.
RandomDog
Random pictures of dogs.
RandomDuck
Random pictures of ducks.