Harness MCP Server

ONE ADDRESS.
YOUR WHOLE BUSINESS, WITH RULES.

MCP is the standard way AI tools connect to other software. The Harness by Heoka MCP server is how ChatGPT and Claude reach your accounts, your inbox and your company memory, without you copying anything into the chat.

Server address: https://mcp.heoka.co.uk/mcp

What it connects

  • Live today: Xero, Gmail and Outlook.
  • Works with: ChatGPT and Claude, through their connector settings.
  • Next: QuickBooks. Not live yet.

What the AI can and cannot do

  • Read overdue invoices, customer history and your rules, when you ask.
  • Prepare chase drafts, which go to your approval queue.
  • Save notes to your company brain.
  • Never send email. Never edit invoices. Never see apps you have not connected.

Setup guides: ChatGPT, Claude. The full picture: how it works.

Questions

What is the Harness MCP server?

It is the connection point that lets ChatGPT, Claude and other MCP-compatible AI tools talk to Harness by Heoka. The AI asks Harness for invoices, customer history and rules, and Harness decides what it may see and do.

What is the Harness MCP server address?

The address is https://mcp.heoka.co.uk/mcp. Add it as a connector in your AI tool, then sign in to Harness to approve the link.

Can the AI send email through the MCP server?

No. Through MCP the AI can read and prepare. Drafts go to your approval queue and a person taps send.

How is this different from Xero's own MCP or connector?

Xero's connector exposes Xero data. The Harness MCP server combines your accounting app, your email history, your rules and your company memory, with an approval step on anything that leaves the business.

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