Model Context Protocol endpoint: https://api.underscore.am/mcp
Add it to an MCP client as an HTTP server; it will discover OAuth automatically and open a sign-in page.
Tools: search_matter_files, search_legislation, search_judicial_acts, search_skills, open_skill — the same ones the
product's own assistant answers with. search_matter_files reads the
firm you belong to, and appears only once you have signed in.