Free.ai API: One API for Every AI Tool
Free.ai offers a single unified API that gives developers access to every AI tool on the platform. Learn about endpoints, authentication, and getting started.
Building AI features into your application usually means integrating multiple APIs — one for chat, another for images, another for speech, and so on. Free.ai's unified API gives you access to every AI tool through a single endpoint, with consistent authentication, request formats, and response structures.
The API covers all major capabilities: text generation (chat, writing, summarization), image generation and editing, text-to-speech, speech-to-text, translation, code generation, document processing, video generation, and more. Each tool has its own endpoint but follows the same patterns, so once you learn one, you know them all.
Getting started is simple. Sign up for a free API key on Free.ai, and you immediately get access to every endpoint with a free token allocation. Authentication uses a standard Bearer token in the request header. Requests and responses use JSON. There are official SDKs for Python and JavaScript, and the REST API works with any language.
The free tier includes the same daily token allocation as the web interface, making it perfect for prototyping, personal projects, and small-scale applications. Paid plans offer higher rate limits and larger token pools for production applications. The pricing is usage-based, so you only pay for what you use.
Developers use the Free.ai API for a wide range of applications: adding AI chat to websites, automating content pipelines, building voice assistants, creating translation services, powering coding assistants, and much more. The API documentation includes examples, tutorials, and a playground for testing requests before writing code.