Top 35 AI APIs For Developers
AI
RouterBase API
One OpenAI-compatible API for accessing 200+ AI models from OpenAI, Anthropic, Google, Meta, xAI, DeepSeek, and more.
SkyBiometry
Face Detection, Face Recognition and Face Grouping.
- Ad
Learn moreSerpApi - Search API
SerpApi's Search API makes it easy and fast to scrape Google and other search engines.
Spam Hunter
Free service to classify text as spam using ML.
Summarize Text with AI
This API generates customizable summaries of text and web pages using AI.
Unplugg
Forecasting API for timeseries data.
WolframAlpha
Provides specific answers to questions using data and algorithms.
Guides
All guides- Best OpenAI API Alternatives in 2026, RankedThe best OpenAI API alternatives in 2026, ranked by cost, openness and drop-in compatibility, with every free tier and base URL checked in September 2026.
- API Rate Limiting: Handle 429s, Then Set Your OwnHow API rate limiting works from both sides: reading limit headers, backing off correctly from a 429 against real public APIs, and setting limits on your own.