fast-agent
An open-source agent harness with a terminal interface, multiple model providers, and MCP client and server support.
About this listing
fast-agent is an agent harness for working with language models and connected tools from a terminal. It supports multiple model providers as well as local models through llama.cpp, so developers can choose the model environment that fits their workflow. Its MCP integration covers client and server operation, including tools, resources and interactive Apps. Agent Skills provide reusable instructions that can be loaded on demand, while A2A support allows agents to connect to one another or be served to other clients. The project code is available under the Apache License 2.0. Free refers to the code, not paid model subscriptions, provider API usage or the infrastructure used to run it.