mcp-switchboard-hub
The server half of mcp-switchboard.
It accepts outbound WebSocket tunnels from machines running local stdio MCP servers, speaks MCP to each tunnelled server, and re-serves every tool from one place:
/mcp— Streamable HTTP MCP endpoint for consumers (n8n, agents), also available scoped per machine (/mcp/host/{label}) or per server (/mcp/host/{label}/server/{server})./— a web console to browse connections, servers and tools, call any tool by hand, and read back every call./api/*— the JSON API behind the console./metrics— Prometheus.- Loki export and a SQLite call log.
Running
pip install mcp-switchboard-hub
MCP_SWITCHBOARD_TUNNEL_TOKEN=... mcp-switchboard-hub
It listens on two ports on purpose: the tunnel endpoint (default
127.0.0.1:8097) is the only thing meant to face the internet and always
requires a bearer token, while the console, API, /mcp and /metrics live on a
second listener (default 127.0.0.1:8099) that binds loopback and is
unauthenticated by default.
Everything is configured through MCP_SWITCHBOARD_* environment variables, read
from the environment or a .env file. Any value that starts with / and points
at an existing regular file is replaced by that file's contents, so secrets can
be passed as paths without separate *_FILE variables.
See the main README for the full picture, and docs/PROTOCOL.md for the tunnel wire format.
1 maintainer
Metadata
1 maintainer
Release files for mcp-switchboard-hub 0.2.0
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