CURATED COLLECTION
Generous free tiers that don't expire
APIs whose free plan is actually usable in production, not a 7-day trial.
Every entry here ships with a free tier you can build a real product on top of — measured in monthly requests or active users, not trial days. Upgrade only when traffic justifies it.
8 APIs in this collection
IN THIS COLLECTION
- Email Activity (beta)Twilio SendGrid sends transactional and marketing emails with deliverability analytics for opens, clicks, and bounces.Email→
- Slack Web APISlack Web API lets apps read and post messages, manage channels, and upload files — the foundation for Slack bots and integrations.Collaboration→
- Notion APINotion API lets external apps read and write pages and databases — used for automation, internal tools, and dashboard integrations.Collaboration→
- Spotify Web APISpotify Web API lets apps search tracks, manage playlists, and control playback — the base layer for music integrations and recommendations.Media & entertainment→
- The Plaid APIPlaid API connects to user bank accounts to pull transactions, balances, and identity — primarily serving fintech apps in US, CA, UK, EU.Financial services→
- AsanaAsana API lets apps read and write tasks, projects, goals, and portfolios — the primary integration entry point for team collaboration.Developer Tools→
- Zoom APIZoom API creates meetings, manages participants, and fetches recordings or transcripts — the foundation for Zoom integrations and bots.Telecom→
- CoinGecko APICoinGecko API provides real-time price, market cap, volume, and historical data for 13000+ cryptocurrencies — the most popular free crypto data API.Financial services→