MCP
Self-host the MCP over stdio; HTTP is explicit opt-in.
The local MCP tools are execute, render_png, and describe. Multi-step parse/narrow/mutate/verify workflows run inside execute(code) on your machine or inside your own MCP host.
The public website does not execute Code Mode. The deployed /mcp route returns 501 hosted_mcp_not_enabled; use stdio MCP from a local checkout unless you deliberately self-host HTTP.