Plain-AyI
← All projects
Developer building blocks

BAML

A programming language for building reliable AI agents.

New this week

What it does

BAML is a programming language made for building software that uses AI language models. Its makers say it is designed so agents make fewer mistakes.

It looks like TypeScript but has a strict type system, typed errors and a built-in testing framework aimed at AI work.

You can use it on its own or call BAML functions from other languages such as Python, TypeScript, Go, C#, Java and more.

Who it's for

Developers who want a dedicated, type-safe language for building AI features.

Can I use it without coding?

Developers only. It is a programming language and toolchain for developers. New to this? Start here.

Can I run it?

Cost
Free, but needs an AI accountThe software is free, but it uses an online AI service (like OpenAI or Anthropic), which usually charges for use.
Runs on
Mac, Windows, Linux
Computer
An ordinary computer is fine
Privacy
Your choice: run it on your device or use an online service
API key
Needed. An API key is a password-like code from an online AI service. What's that?

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • Keep your API key private. Never paste it into websites or share it, and set a spending limit with the AI service.
  • More on staying safe

Where people are talking about it