TfL

Edit~/Library/Application Support/Claude/claude_desktop_config.json:

bun run build && bun run inspect

This opens the Inspector UI in your browser where you can call any tool interactively and inspect request/response shapes.

The most common failure mode is passing a free-text name tojourney_plan, which causes TfL to return a 300 disambiguation response. The tool handles this gracefully and returns suggestedparameterValueIDs to retry with.

Preferred ID formats (most to least reliable):

src/ ├── config.ts # Effect Config — TFL_API_KEY ├── main.ts # Entry point — ManagedRuntime + StdioServerTransport ├── domain/ │ ├── TflClient.ts # Context.Tag service interface │ └── errors.ts # TflError, TflDisambiguationError ├── infra/ │ ├── TflClientLive.ts # Layer.effect — HTTP client with disambiguation handling │ └── TflClientTest.ts # In-memory test adapter └── mcp/ ├── server.ts # McpServer wired to ManagedRuntime ├── utils.ts # formatSuccess, formatError, formatDisambiguation └── tools/ # One module per TfL domain (13 files)

US/HK markets — 110 tools: real-time quotes, options, orders, fundamentals, alerts, DCA & portfolio

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