Curated API collections
for every use case.
Hand-picked lists of free AI APIs grouped by what you're building — from hackathon starters to production RAG pipelines.
Best APIs for Hackathons
APIs with the easiest setup, highest free limits, and best documentation — picked for shipping speed. All no credit card required.
OpenAI Alternatives
Providers offering comparable or better models than OpenAI, all with real free tiers and OpenAI-compatible APIs.
No Credit Card Required
Every API in this list can be signed up for with just an email address. No payment details needed, ever.
Best Image Generation APIs
Top providers for generating images via FLUX, Stable Diffusion, and other diffusion models. From free to production-grade.
Build a Voice App
Everything you need to add voice to your application: speech-to-text, text-to-speech, and real-time audio streaming.
Hidden Gems
APIs that don't get enough attention. High quality, generous free tiers, smaller user base — worth knowing about.
AI Video Generation APIs
The best APIs for generating video from text or images. From short clips to cinematic sequences.
Chinese AI APIs
The best Chinese LLM providers with free tiers. Many offer generous token quotas and are optimized for Chinese-language tasks.
Build a RAG Pipeline
The best APIs for Retrieval-Augmented Generation: embeddings, reranking, web scraping, and semantic search.
AI Agent Platforms
Platforms for building and deploying AI agents without managing infrastructure. Many include free tiers with powerful underlying models.