# US Codex Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## US Codex

Search and read US Code, regulations, bills, laws and executive orders with cross-links and version history.

- Record: https://musedirectory.ai/connector/us-codex
- Category: Legal
- Developer: uscodex.org (https://uscodex.org/mcp)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 387ms, checked 2026-09-28T07:46:09Z
- Endpoint: https://uscodex.org/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-25T03:21:10Z)
- Source: Found in the official MCP Registry (org.uscodex/uscodex) https://registry.modelcontextprotocol.io/v0/servers?search=org.uscodex%2Fuscodex

Access the full text of federal law including the United States Code, Code of Federal Regulations, Public Laws, Congressional Bills, and Executive Orders. Search across all corpora, read documents with legislative history, compare versions, and find what cites each provision.

Example request: "Show me how the tax code section on income has changed over the past five years."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use US Codex to help me. It is a free service with an MCP server at https://uscodex.org/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- search: Search the full text of federal law: United States Code, Code of Federal Regulations, Public Laws, Congressional Bills, Executive Orders. Results are ranked across every corpus unless `corpus` narrows them, each with its citation, a link and the matching words. A query that is on
- fetch: Read a document or page of the site as markdown: a code section with its notes, a title's or unit's contents, a public law, a bill (at any version), an executive order. Paths also reach the corpus indexes ("/usc", "/pl?congress=118", "/bills?congress=119", "/eo") and each code's 
- citations: What cites a document: each corpus's citations of a code section, law, bill or order, with the words that cite it, and for a statute the regulations issued under it. Lists come 50 at a time; `list` and `offset` page through one.
- history: How a document came to be: for a code section, the laws that enacted and amended it and every release that changed its text; for a law or bill, its legislative history, each version linked to its text and to what changed from the one before.
- compare: What changed in a code section between two releases: each provision added, removed, changed or renumbered, the edits marked <del> and <ins>. To compare versions of a bill, take the 'what changed' link from its history.

Screening checks:
- MCP handshake: pass (Answered in 445ms)
- Domain against threat feeds (Cloudflare security DNS): pass (uscodex.org not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (5 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 37 days ago)
- AI review of purpose and tool behavior: pass (No concerns)