Nothing here is Claude-specific.
https://mcp.vaquill.ai/mcp speaks the Model Context Protocol over Streamable HTTP, which is an open standard. Client-specific pages exist because the setup steps differ, not the server.Connect
401 with a WWW-Authenticate header pointing at the protected-resource metadata, which is how a compliant client knows to start the sign-in.
For Codex and other terminal clients, register it the way that client documents for a remote MCP server over Streamable HTTP, then complete the browser sign-in it opens.
The search and fetch pair
Research-style clients, including ChatGPT’s deep research and company-knowledge connectors, look for two specific tools rather than a bespoke catalogue. This server publishes both:
They are deliberately additive. If your client can call the typed tools instead, prefer them:
search_us_statutes filters by jurisdiction, corpus, date and status, which the generic pair cannot.
Verify it works
A green connection proves nothing. Make one real call, and the cheapest is free:“List statutes coverage for California.”
list_statutes_coverage costs 0 credits, so it confirms the connection carries an identity without spending anything.
What you get
The US Code, the Code of Federal Regulations, all 50 state statutory codes plus DC and Puerto Rico, state administrative regulations, federal and state court rules, federal and state constitutions, agency guidance from 51 named sources, agency adjudications, the Statutes at Large and the Federal Register. Roughly 5.8 million sections, of which about 4.5 million are not marked repealed. Every legal-record result carries its official source URL and the publisher’s own status for that section. Where currency cannot be vouched for, the derived good-law verdict reportsunknown rather than over-claiming.
Costs
Metered per call against your credit balance. Reads are 1 to 6 credits;list_statutes_coverage, get_credit_balance and get_pricing are free. Every response reports its own creditsConsumed, and a backend failure returns 503 and is refunded automatically.
New accounts include 1,000 free credits. See pricing.
Other clients
Claude
One-click connector, listed in the Claude directory.
Cursor, VS Code, Windsurf
API-key setup for editors that do not support OAuth.