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.
Custom Vision Training Client
Custom Vision Training API programmatically trains image-classification / object-detection models — create projects, upload labeled images, trigger training, publish iterations.
Danbooru Anime
Thousands of anime artist database to find good anime art.
DeepSeek API
DeepSeek API provides China's top open-source LLMs — DeepSeek-V3, DeepSeek-Coder, etc.; known for extreme cost-effectiveness + open-source strategy + inference performance.
DigitalOcean API
DigitalOcean API offers programmatic control of Droplets (VMs), managed Kubernetes, object storage, and databases.
Display & Video 360 API
Display & Video 360 API programmatically manages Google ad campaigns — DSP (demand-side platform) inventory buying, campaign creation, creative upload, performance reporting.
Dog Facts
Random dog facts.
Dogs
Based on the Stanford Dogs Dataset.
Drive API
Google Drive API exposes file storage, sharing, and search — the foundation for document collaboration integrations.
Dune Analytics API
Dune Analytics API lets developers programmatically execute SQL queries on indexed on-chain data for Ethereum / Polygon / Arbitrum / Solana / etc.
dYdX API
dYdX is a decentralized derivatives exchange (perpetuals DEX) API — runs on StarkEx Layer 2, offering low-fee + on-chain settlement derivatives trading.
eBird
Retrieve recent or notable birding observations within a region.
ElevenLabs API Documentation
ElevenLabs API provides top-tier AI text-to-speech — hyper-realistic natural voice, voice cloning, 29 languages, custom voices via Voice Lab.
Email Activity (beta)
Twilio SendGrid sends transactional and marketing emails with deliverability analytics for opens, clicks, and bounces.
Entity Search Client
Bing Entity Search recognizes queries as named entities (people, places, organizations) and returns structured card info (description, image, related links).
Error Reporting API
Google Cloud Error Reporting API auto-aggregates and analyzes app errors — extracts from logs, groups by stack trace, sends alerts.
Etherscan API
Etherscan API provides Ethereum mainnet block explorer data — transaction history, token holdings, contract source code, internal transactions, ETH gas tracker.
Event Notification API Specification - TPP Endpoints
UK Open Banking Event Notifications API lets TPPs (third parties) subscribe to bank event streams — async notifications for account changes, consent revocations, customer status changes.
ExchangeRate-API
ExchangeRate-API provides real-time and historical exchange rates for 160+ currencies — free tier without API key, conversion calculations supported.
FaSta - Station Facilities Status
Retrieve operational status for station elevators and escalators, either by stationnumber or equipmentnumber.
Fauna API
Fauna is a serverless distributed ACID database — globally distributed, strongly consistent, FQL query language, hybrid relational + document model.
Firebase App Check API
Firebase App Check API protects backend APIs to accept only requests from legitimate apps — preventing abuse, credential misuse, and bot attacks.
Firebase Hosting API
Manage Firebase Hosting sites, preview channels, releases, versions, and file uploads from deployment pipelines.
Firebase Management API
Firebase Management API programmatically manages Firebase projects — create projects, add web/iOS/Android apps, configure hosting/database/auth.
Firebase Realtime Database API
Firebase Realtime Database API is Firebase original NoSQL real-time database — JSON tree data model, millisecond sync; one of the earliest "real-time" databases.