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fast-agent

  • Start now

    Run fast-agent with the uv package manager:

    uvx fast-agent-mcp@latest -x

  • Agent Skills

    Use Agent Skills to progressively disclose capabilities for your Agents. With registry update support. Check the documentation here.

  • New - Elicitation Quickstart Guide

    Get started with MCP Elicitations for User Interaction. Try now

  • Validated Model Support

    Advanced support for models including OpenAI, Anthropic, Hugging Face, llama.cpp and more. Supports using Codex with OAuth.

  • MCP Feature Support

    Full MCP feature support including Elicitation and Sampling and advanced transport diagnostics

    Reference

  • Agent Developer Friendly

    Lightweight deployment - in-built Echo and Playback LLMs allow robust agent application testing

Getting Started


Coding Agent

fast-agent makes supervising LLM and Tool streams simple, highlighting important results, actions and exceptions in long tool loops.

Fully extendable agent hook system and bundled skills to customise fast-agent with Python code. Fork, rewind and pin sessions.

Seamless shell integration, protecting your scrollback buffer for review, or use with ACP to use Agents with your editor of choice.

Agent Developers and Application Builders

fast-agent lets you create and interact with sophisticated Agents and Workflows in minutes.

It's multi-modal - supporting Images and PDFs in Prompts, Resources and MCP Tool Call results.

Prebuilt agents and examples implementing the patterns in Anthropic's building effective agents paper get you building valuable applications quickly. Seamlessly use MCP Servers with your agents, or host your agents as MCP Servers.

Evaluations and Automations

Comprehensive CLI and Model support with embedded telemetry in results files make fast-agent an excellent choice for testing and evaluations.

Quick Installation Guide

  • uv tool install fast-agent-mcp - Install fast-agent. If you have multiple Python versions, use --python 3.13.5 to ensure you get the latest version of fast-agent.
  • fast-agent go - Start an interactive session...
  • fast-agent go --url https://hf.co/mcp - ...with a remote MCP.
  • fast-agent go --pack hf-dev - ...from an installed or marketplace card pack.
  • fast-agent scaffold - Create Agent and Configuration files for Python development.