claude.ai Remote MCP
Remote MCP uses the Streamable HTTP endpoint:
https://api.gessa.ai/mcp/rpc
The server advertises Protected Resource Metadata and Authorization Server Metadata. claude.ai should register or identify a client, redirect the user through /mcp/auth/authorize, require PKCE S256, request the resource value for /mcp/rpc, and exchange the code at /mcp/auth/token.
Verification: after authorization, ask claude.ai to call engine_get_engine_spec and workspace_list.