Fast Agent is a CLI-first Python framework designed to build, test, and interact with multimodal AI agents and workflows.
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It provides comprehensive support for the Model Context Protocol (MCP) and offers a flexible environment for orchestrating complex agent behaviors, including routing and parallel execution.
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Complete end-to-end MCP integration with sampling and elicitation support
- 02
Comprehensive model provider support including OpenAI, Anthropic, Google, and local models
- 03
CLI-first development with an optional prompt_toolkit-powered TUI
- 04
Declarative agent syntax and reusable Agent Skills system
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Advanced workflow orchestration (parallelization, routing, and orchestrator-workers)
Open Source
Fast Agent is an open-source framework, distributed via GitHub and accessible through Python package managers like uv.
Best for
Developers building sophisticated AI workflows, automation scripts, and custom agentic tools that require deep integration with MCP servers and complex multi-agent orchestration.
Not ideal for
Users seeking a managed, no-code SaaS platform, as it is a developer-centric framework requiring command-line interaction and configuration.
A robust, highly technical tool for developers needing full control over agentic workflows, particularly those leveraging the Model Context Protocol ecosystem.
The v0.10.49 release introduced support for GLM-5.3 models, refined reasoning controls, improved PTC call recording in ATIF exports, and enhanced provider failure handling.
As of
Is Fast Agent free?+
Yes - Fast Agent is Open Source. Fast Agent is an open-source framework, distributed via GitHub and accessible through Python package managers like uv.
Is Fast Agent open source?+
Yes - Fast Agent is open source. Fast Agent is an open-source framework, distributed via GitHub and accessible through Python package managers like uv.
Who is Fast Agent best for?+
Developers building sophisticated AI workflows, automation scripts, and custom agentic tools that require deep integration with MCP servers and complex multi-agent orchestration.
Who is Fast Agent not ideal for?+
Users seeking a managed, no-code SaaS platform, as it is a developer-centric framework requiring command-line interaction and configuration.
What are the best Fast Agent alternatives?+
The closest Fast Agent alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.
Who makes Fast Agent?+
Fast Agent is developed by EvalState. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.
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