barrel_server_mcp (barrel_server v1.0.1)
View SourceThe MCP endpoint: mounts livery_mcp (the Streamable HTTP bridge to the barrel_mcp engine) at /mcp inside the REST router. Configured with {barrel_server, mcp, #{...}}:
- enabled - mount the endpoint (default true) - allowed_origins - any or a list of Origin values (default any; tighten for browser-reachable deployments) - allow_missing_origin - accept requests without an Origin header (default true; non-browser MCP clients send none)
Auth: /mcp is exempt from the global bearer middleware and authenticates through barrel_server_mcp_auth instead, which covers the same server tokens plus capability (bsp_) tokens.
Also the registrar: a supervised gen_server (started before the HTTP service) that registers the barrel tools in barrel_mcp's shared registry on start and unregisters them on shutdown.
Summary
Functions
Whether the MCP endpoint is mounted.
livery_mcp handler options derived from the env.
The /mcp routes (empty when disabled). The handler serves POST (JSON-RPC), GET (the SSE notification stream), DELETE (session termination) and OPTIONS (preflight).
Functions
-spec enabled() -> boolean().
Whether the MCP endpoint is mounted.
-spec handler_opts() -> livery_mcp:opts().
livery_mcp handler options derived from the env.
The /mcp routes (empty when disabled). The handler serves POST (JSON-RPC), GET (the SSE notification stream), DELETE (session termination) and OPTIONS (preflight).