# US Federal Register Watch

> New federal rules, proposed rules and notices for your keywords and agencies — with open comment deadlines — in your AI agent.

Remote MCP server (Streamable HTTP): https://us-federal-register-mcp.donniertf.workers.dev/mcp
Free tier: `reg_search` — no key, no sign-up, 20 calls/day per IP.
Pro: $12/month, cancel anytime — all tools, unlimited.

## Tools
- reg_search (free): FREE. Latest 5 Federal Register documents (rules, proposed rules, notices) matching a keyword, e.g. 'PFAS', 'overtime', 'crypto'.
- reg_watch (Pro): PRO. Documents since a date for keywords and/or agency slugs (e.g. 'environmental-protection-agency') and types (rule, proposed, notice, presidential).
- open_comments (Pro): PRO. Proposed rules with comment periods still open for a keyword/agency — deadline first.

## Buying (agents)
1. POST https://us-federal-register-mcp.donniertf.workers.dev/checkout -> {checkout_url, session_id}. A human (or a payment-capable agent) completes Stripe Checkout at checkout_url.
2. GET https://us-federal-register-mcp.donniertf.workers.dev/token?session_id=... -> {access_token}.
3. Send Authorization: Bearer <access_token> to https://us-federal-register-mcp.donniertf.workers.dev/mcp (or pass access_token in tool arguments).

## Pay per call (x402, USDC on Base)
No account: POST JSON args to https://us-federal-register-mcp.donniertf.workers.dev/x402/<tool> -> HTTP 402 with payment requirements ($0.03 USDC per call, payTo 0x02226D28e0c85AE4AdDB7fe7043Dd2b1Ff710D41). Retry with an X-PAYMENT header (x402 v1, scheme exact, network base). Manifest: https://us-federal-register-mcp.donniertf.workers.dev/.well-known/x402. MCP clients may also send X-PAYMENT on tools/call.
Machine-readable pricing: https://us-federal-register-mcp.donniertf.workers.dev/pricing.json · Server card: https://us-federal-register-mcp.donniertf.workers.dev/.well-known/mcp

## Sources
- Federal Register API (federalregister.gov), public domain

## Notes
From the Federal Register API (Office of the Federal Register). Summaries are abstracts; the official text governs. Not legal advice.
Contact: dmorrisonwebdesign@gmail.com. More UK data MCPs: https://github.com/donniertf-hub/uk-mcp-fleet