mcp.client

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Clojure only.

MCP 2026-07-28 client for tools over stdio and Streamable HTTP.

MCP 2026-07-28 client for tools over stdio and Streamable HTTP.

(call-tool conn name arguments)

Call a named MCP tool with a JSON-object argument map. Returns its MCP result, throwing ex-info for JSON-RPC errors.

Call a named MCP tool with a JSON-object argument map. Returns its
MCP result, throwing ex-info for JSON-RPC errors.

(close! conn)

Close the client connection, including a launched stdio child process.

Close the client connection, including a launched stdio child process.

(connect {:keys [command url] :as options})

Connect using exactly one of {:command [...]} or {:url "https://..."}.

Connect using exactly one of {:command [...]} or {:url "https://..."}.

(connect-http url
              &
              [{:keys [timeout-ms headers client-info capabilities]
                :or {headers {}}}])

Connect to a Streamable HTTP MCP endpoint. Options: :timeout-ms, :headers, :client-info, and :capabilities.

Connect to a Streamable HTTP MCP endpoint. Options: :timeout-ms,
:headers, :client-info, and :capabilities.

(connect-stdio command
               &
               [{:keys [env cwd timeout-ms client-info capabilities]
                 :or {env {}}}])

Launch an MCP server as a subprocess. Options: :env, :cwd, :timeout-ms, :client-info, and :capabilities.

Launch an MCP server as a subprocess. Options: :env, :cwd, :timeout-ms,
:client-info, and :capabilities.

(discover conn)

(list-tools conn)

List all server tools, following pagination cursors.

List all server tools, following pagination cursors.

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