Through the MCP connector, Claude.ai works directly on the data in your online-billing-service.com account: invoices, clients, products, payments and reports. You ask in plain language and it reads — and, if you ask it to, writes — straight into the account. No exports, no copy-paste.

You need:

• a Claude.ai subscription that allows adding connectors;
• an online-billing-service.com subscription that includes the integration.

Step 1: copy the MCP URL

Open Integrated services → Claude.ai and click Copy, next to MCP URL.

You need no Client ID and no Client Secret: Claude registers itself.

Step 2: open the connector list in Claude.ai

In Claude.ai go to Settings → Customize → Connectors and click Add, at the top right.

Step 3: fill in the name and the server address

Give it a name (online-billing-service.com, say), paste the address you copied into MCP server URL and press Continue.

Step 4: let Claude detect the sign-in

There is nothing to fill in on the second step: Sign in now and Register automatically are already selected, marked Detected. Press Add.

Step 5: authorise access

Press Connect. An online-billing-service.com page opens showing which account you are signed in as and what Claude is about to reach. Press Authorize.

Done

The connector shows as connected and Claude lists the tools it can use. You can end the access at any time, either from Claude (Disconnect) or from online-billing-service.com (Disable integration).