OneBusAway/mcp-server is an MCP (Model Context Protocol) server.
View on GitHub ↗Real-time transit data for LLMs, backed by the OneBusAway API.
Ask any MCP-compatible client (Claude, Claude Code, opencode, or your own) questions like "When is the next bus at 3rd & Pine?", "What routes stop at Memorial Union?", or "Is the P line running on time?" and get live answers from GTFS and GTFS-realtime feeds.
Two packages. Use them together or on their own.
Package What it is --- --- mcp/ The MCP server. A single Go binary. Exposes 29 transit tools over stdio or HTTP. ui/ An optional web chat interface (SvelteKit). Talks to any LLM provider and to the MCP server.
Every question flows through the same chain:
1. Your LLM makes a tool call over MCP. 2. onebusaway-mcp-server turns it into an HTTP request against a OneBusAway backend. 3. The backend (e.g. maglev) returns live transit data sourced from GTFS static and GTFS-realtime feeds.
The web UI is optional. It just adds a browser chat on top of the same MCP server.
This repo pairs an MCP server with a chat UI, but you don't have to use both.
- Building an agent or app? Point any MCP client at this server in HTTP mode. The 29 tools become your data layer. - Prefer plain REST? Skip the MCP layer and call a OneBusAway REST server directly. Both onebusaway-application-modules (the original Java implementation) and maglev (its next-generation Go rewrite, same REST API) work as backends. - Want a browser starting point? Fork ui/ and adapt it.
From the project README.
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