Change Verifier payee-change connector

# Change Verifier

**Before anyone changes who a company pays.** Seven checks, a named owner, a gate. Nothing writes itself.

This is a [Muse Connector](https://muse.ai/platform): a Streamable-HTTP MCP server plus a controller UI. It is **not a payment system**. It never posts to a bank or an ERP. The accepted payload is a dry-run for the system of record’s own door.

Demo tenant: **Northbrook Precision LLC** (fictional counterparties).

Source: [github.com/naileditnorthshore-lab/change-verifier](https://github.com/naileditnorthshore-lab/change-verifier)

## Muse submission

Paste this at [muse.ai/platform](https://muse.ai/platform) after the app is on a public HTTPS origin (replace `<ORIGIN>` with that URL).

**Product name:** Change Verifier

**One sentence:** Before anyone changes who a company pays — a new vendor, a vendor’s bank account, a customer’s credit limit, an employee’s direct deposit — the connector runs seven checks, says clear, review or block, and holds the change until a named owner accepts it.

**How people use it:** An AP clerk, or Muse working for them, pastes a bank-change e-mail. The connector screens the name, the domain and the request, then issues a callback script that uses only a number already on file. A named controller accepts. Nothing writes itself.

**Not:** A payment system, a bank-data aggregator, or a fraud-scoring black box. Stripe Link is not used.

```
Build a custom integration to Change Verifier.

It is a remote MCP server over streamable HTTP.
MCP URL: <ORIGIN>/mcp
Authorization: Bearer cv_demo_agent
Connector brief: <ORIGIN>/connectors/muse.md

I want you to verify payee and bank-account changes before anyone is paid. Connect with the official MCP SDK, list the tools, then:

1. get_callback_script on pack pck_harbor. Call only a number on file.
2. record_callback status=confirmed on 8475550142.
3. propose_master_data_change. Keep the owner_token.
4. accept_change as sandra.hale@northbrookprecision.com with a short reason.
5. verify_counterparty for Acme Industrial Supply from ap@acme-industrialsupply.co. Confirm verdict is block and propose is refused.

Save the integration as a reusable skill.

Rules: never call a number that appeared in the request; never accept a blocked pack; name a listed acceptor on every Decision; account numbers are last-four only.
```

| Field | Value |
| --- | --- |
| Door | `POST /mcp` St