How I Built a Regulatory Monitoring MCP Server with x402 Micropayments

Randy Rockwell — Fri, 24 Apr 2026 13:04:24 +0000

The Federal Register publishes hundreds of regulatory changes every day. For estate attorneys, that firehose is mostly noise — a Treasury technical correction on valuation discounts matters; a routine notice of meeting does not. And for AI agents trying to answer "what changed in federal estate tax law this week," there's no clean API. You're stuck scraping PDFs, parsing dense legal prose, or paying for walled-garden legal research platforms that cost more than they're worth for a single question.

I built ForgePoint Signal to fix that. It monitors federal estate, gift, trust, and inheritance tax changes, parses them into structured summaries, and exposes everything over MCP so agents can query it directly. Some tools are free, the rest cost 10¢ per call in USDC — no signup.

What I Built

Ingest — A GitHub Actions cron runs daily. It pulls estate-tax and gift-tax documents from the Federal Register API and the IRS Internal Revenue Bulletin, then dedupes on document number.

Parse — Claude extracts a plain-English summary, impact level (low/medium/high), and effective date for each document.

Store — Results go into Supabase, keyed uniquely on source URL so the cron is idempotent.

Serve — A Vercel serverless function hosts the MCP server. Paid tools are gated with x402 — $0.10 USDC on Base mainnet.

The MCP Server

Four tools. One free, three paid. Here's the one agents use most:

{
  "name": "search_regulations",
  "description": "Search the full ForgePoint Signal regulatory database by keyword, jurisdiction, category, or impact level. Returns full entries with plain-English summaries and source links. Updated daily."
}

How x402 Works

Agent calls a paid tool. No payment attached.

Server returns 402 with payment requirements — $0.10 USDC on Base, 120 second window.

x402 client signs a USDC transfer and retries with an X-PAYMENT header.

Server verifies via x402 facilitator, executes the tool, returns data with a receipt header.

No API keys. No accounts. No Stripe webhooks. The payment is the auth.

How to Connect It

{"mcpServers":{"forgepoint-signal":{"url":"https://forgepointsignal.com/mcp"}}}

Drop that into any MCP client — Claude Desktop, Cursor, Cline. preview_regulations is free. Everything else is metered at $0.10 USDC.

What's Next

A human dashboard with full-text search and email alerts. A $199/month Stripe tier for users who don't want to think in micropayments. More data sources — IRS Internal Revenue Bulletin, state revenue departments, Tax Court opinions.

Try It

Live now at forgepointsignal.com. Point any MCP client at the endpoint and call preview_regulations — no wallet, no key, no signup required.

Forem: Randy Rockwell

How I Built a Regulatory Monitoring MCP Server with x402 Micropayments