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, read_matter_file, search_legislation, read_legislation_article, search_judicial_acts, read_judicial_act, search_ip_registry, search_glossary, read_glossary, search_skills, open_skill, report_footgun, preview_document — 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.