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MCP Quickstart

MCP protocol support varies significantly across different LLM models and IDEs currently available (list of available clients). In this tutorial, we'll demonstrate how to connect Claude to the Invoicetronic MCP service, enabling you to interact with our API using natural language. At this time, Claude features the most complete support for the protocol.

Prerequisites

We assume that these prerequisites are met:

  • You obtained an active API Key
  • You have an active Claude subscription (Pro or higher is required at the time of this writing.)

Connect Claude to the Invoicetronic MCP Service

  1. Go to Claude Settings (click on your name, then click Settings on the menu).
  2. Click on "Connectors".
  3. If you are on a subscription, the button "Add custom connector is available". Click it. 4 Type "Invoicetronic" in the Name field.
  4. Type "https://mcp.invoicetronic.com" in the "Remote MCP server URL" field
  5. Click the "Add" button.

This is how the "Add custom connector" from should look before you press the "Add" button

How the "Add custom connector" form should look before you press the "Add" button.

At this point, the Invoicetronic connector will be listed on the Connectors page:

The Invoicetronic custom connector is now listed in the available Claude Connectors

The "Invoicetronic" custom connector is now listed in the available Claude Connectors.

You can now click on the "Connect" button in order to activate the Invoicetronic connector. Once you do that, Claude connects to the Invoicetronic MCP Service, which will ask for your API Key:

Enter you API key here, then click the "Authorize" button

Enter your API key here, then click the "Authorize" button.

Enter your API key and click the "Authorize" button. Once that's done, you will be brought back to Claude, where the Invoicetronic connector is shown as "Connected"

Claude is now connected to the Invoicetronic service

Claude is now connected to the Invoicetronic service.

You are now ready to interact with the Invoicetronic API with natural language. In the example below, we started a new chat and asked about our account's Invoicetronic status.

A natural language interaction with Invoicetronic

A natural language interaction with Invoicetronic.

Remember, the API key you pick for the connection matters. If you provide a test key, LLM responses will draw from the Sandbox. If you submit a live API key instead, data will come from the live environment.