c4c-mcp

# C4C: Mortgage Industry Regulations

**A read-only MCP server that gives your AI assistant the verbatim text of U.S. mortgage regulations, with citations and effective dates, so it quotes the rule instead of guessing.**

From [Claude for Compliance](https://claudeforcompliance.com/mcp/).

- **Server URL:** `https://mcp.claudeforcompliance.com/mcp` (Streamable HTTP)
- **Auth:** none. No sign-in, no API key, no account with us.
- **Registry name:** `com.claudeforcompliance/mortgage-regs`
- **Source docs:** https://github.com/earl-hash/c4c-mcp
- **Docs and install steps:** https://claudeforcompliance.com/mcp/

This repository holds the public documentation for the hosted server: the tool list, example prompts and the registry `server.json`. The server itself is hosted; there is nothing to build or run locally.

## What it covers

HUD Handbook 4000.1 (FHA), the Fannie Mae Selling and Servicing Guides, the Freddie Mac Seller/Servicer Guide, the Ginnie Mae MBS Guide, the VA Lenders Handbook (M26-7) and Servicer Handbook (M26-4), USDA HB-1-3555, the SBA SOP 50 10, plus the CFR and U.S. Code sections they rest on (Regulations B, X and Z, and others).

Every answer carries:

- the **verbatim** regulator text, never a paraphrase presented as a quote
- the **citation** and the **effective date**
- the dated **source document** it came from
- a **currency** flag when it applies: two versions in force, a pending revision, superseded, expired, or changed by a later letter or announcement

## What you can do with it

- Ask in plain words or loan-file shorthand ("DTI", "RSU income", "IRRRL seasoning"). The assistant finds the governing section and quotes it.
- Look up a citation you already have: `B3-4.3-04`, `4000.1 II.A.4.c`, `12 CFR 1026.43`, `38 U.S.C. 3709`, `M26-7 Chapter 4 Topic 9`.
- Check whether a passage, including one from your own draft, really appears in the regulator's text (`verify_quote`).
- Run guided playbooks in the same chat: FHA, VA and USDA loan-file QC, and a review against Fannie Mae Lender Letter LL-2026-04 (AI). Your documents stay in your own chat; the server never receives them.

See [TOOLS.md](TOOLS.md) for the ten tools and five prompts, and [examples/prompts.md](examples/prompts.md) for starter prompts.

## Install

**Claude** (web, desktop, mobile): Settings → Connectors → Add custom connector → paste the server URL. Available on any Claude plan (the free plan allows one custom connector).

**ChatGPT:** Settings → Apps / Connectors → create a connector with the server URL. ChatGPT allows connectors on Plus, Pro, Business, Enterprise and Edu (not its free plan). Claude for Compliance itself is free.

**Claude Code:**

```
claude mcp add --transport http c4c-mortgage-regs https://mcp.claudeforcompliance.com/mcp
```

**Cursor / VS Code / other MCP clients:**

```json
{ "name": "c4c-mortgage-regs", "type": "http", "url": "https://mcp.claudeforcompliance.com/mcp" }
```

## Privacy, limits and support

- **Read-only.** No tool writes anything.
- **No accounts, no IP addresses stored.** We count usage by AI platform only (for example "claude" or "chatgpt"), never by person, and keep the text of searches that found nothing so we can fill corpus gaps. Don't put borrower information in a search. Details: https://claudeforcompliance.com/privacy/
- **No sign-in, by design.** The data is public regulatory text.
- **Limits:** a per-IP rate limit and a daily request budget protect the free service.
- **Not legal advice.** Results are for research. Verify against the primary source. Terms: https://claudeforcompliance.com/terms/
- **Support:** earl@cfsynergies.com

## License

The contents of this repository (documentation and examples) are MIT licensed; see [LICENSE](LICENSE). The hosted service, its corpus and its source code are not part of this repository and are not covered by that license. Regulatory text belongs to its issuing agencies.