spanreed-bus is an open-source Python package providing an inter-agent message bus for local Claude Code sessions. It supports local IPC, MCP protocol, and is designed for developers building agent-based systems. Distributed under the Apache-2.0 license.
spanreed-bus is a Messaging, queues & streaming product. It focuses on enabling local agents to communicate efficiently in Claude Code sessions via a message bus. It is built as an open-source project for developers building agent-based systems with Claude Code. spanreed-bus is open source under the Apache-2.0 license. It runs on the command line.
It is developed by Monkopedia, and the product first shipped in 2026. Development happens publicly on GitHub with 44 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — spanreed-bus occupies a relatively distinct niche. Key capabilities include inter-agent messaging, Local IPC, and MCP support.
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