fast-agent
CLI-first Python agent harness and framework with end-to-end MCP support (sampling, elicitation, OAuth), Agent Skills, ACP and declarative multi-agent workflows.
Tags
Description
Run uvx fast-agent-mcp@latest -x for an interactive session with shell access, or install with uv tool install -U fast-agent-mcp. Connect MCP servers over stdio or Streamable HTTP with /connect, manage SKILL.md skills with /skills, and use any setup from an ACP client via fast-agent-acp. Supports Anthropic, OpenAI and Google natively plus many others (including llama.cpp and Ollama); agents can also be exposed as MCP servers. Includes Streamable HTTP transport diagnostics. PyPI fast-agent-mcp 0.10.47 (Python 3.12–3.15).
Related
- MCP Python SDK: Official Python SDK for building Model Context Protocol servers and clients.
- Agent Client Protocol (ACP): Protocol for connecting any code editor to any coding agent, standardizing editor-agent communication.
- Agent Skills Specification: Open format for packaging agent capabilities as folders with a SKILL.md (YAML frontmatter + instructions) plus optional scripts and resources.
Guides & comparisons
- MCP server frameworks compared: FastMCP vs mcp-use vs the official Python and TypeScript SDKs (Comparison): Four ways to build an MCP server in 2026: the official Python SDK (v2) and TypeScript SDK (v2), Prefect's FastMCP and Manufact's mcp-use. Covers languages, schemas, transports, auth, MCP Apps (UI), local testing, deployment and license.
Sources
- https://github.com/evalstate/fast-agent
- https://pypi.org/project/fast-agent-mcp/
- https://github.com/evalstate/fast-agent/releases
Machine-readable
- JSON
- Markdown
- Source file on GitHub (edit via pull request)