agentbus

An MCP-native message bus that lets MCP-capable AI instances talk to and listen to other AI instances, humans, and arbitrary external programs.

agentbus exposes one envelope format across four surfaces — an MCP stdio shim, a loopback REST API, Server-Sent Events, and a hook-driven inbox — so any MCP-capable agent, CLI, bridge, or script can exchange message / ask / reply / event envelopes.

Crates

Crate	Purpose
agentbus-core	Envelope, registry, mailbox, router, and event log types.
agentbusd	The daemon: HTTP/REST + SSE message bus server.
agentbus-stdio	stdio MCP bridge exposing the bus as MCP tools.
agentbus-cli	Command-line client (agentbus) over the REST API.

Install (Claude Code users)

claude plugin marketplace add github.com/reedom/agentbus
claude plugin install agentbus

Then run /agentbus:install in Claude Code to fetch the daemon and shim from crates.io and start agentbusd on 127.0.0.1:8765.

Build from source

cargo build --release
./target/release/agentbusd &
./scripts/smoke-curl.sh

Documentation

• docs/README.md — documentation index.
• docs/fr/ — functional requirements, the design of record per feature, tracked by the kusara cross-reference graph.
• docs/reference/protocol.md — envelope schema, REST endpoints, and MCP tool surface.

License

Licensed under either of Apache License 2.0 or MIT License at your option.