Integration · Claude

HARNESS + CLAUDE.
SAME RULES. DIFFERENT MODEL.

Claude supports MCP connectors, and Harness by Heoka is one. Add it once and Claude can see your overdue invoices, your customer history and your rules when you ask.

If you started on ChatGPT, nothing is lost by moving. The memory, the rules and the approval log live in Harness, not in the chat.

What Harness reads from Claude

  • Only what Harness passes to it when you ask: overdue invoices, account notes, recent threads.
  • Your rules, so drafts follow your tone and your do-not-chase list.
  • Nothing from apps you have not connected to Harness.

What Harness does with it

  • Answers about who owes what, what was last said, and what to do next.
  • Chase drafts, which wait in your Harness approval queue.
  • Notes you ask it to keep, saved to your company brain in Harness.

Always your call

  • Every message to a customer or supplier.
  • Any change to your rules or tone.
  • Anything touching disputes, credits or payment plans.

Blocked, full stop

  • Claude cannot send email through Harness. Sending is a human tap.
  • It cannot edit invoices in Xero.
  • It cannot see apps you have not connected.
  • Remove the connector in Claude settings and access stops.

Questions people ask

How do I connect Harness to Claude?

Add a custom connector in Claude with the address https://mcp.heoka.co.uk/mcp, then sign in to Harness to approve it. Your invoices, notes and rules are then available in any Claude chat.

Can I switch between ChatGPT and Claude?

Yes. Both connect to the same Harness account. Facts, sources, rules and the approval log stay in Harness, so you can change AI without starting again. Export my memory gives you the whole of it back as one file.

Can Claude send emails through Harness?

No. Claude prepares drafts. A person approves and sends. That does not change with the model.

Is my data used to train Claude?

Harness only passes Claude what is needed to answer the question you asked. How Anthropic handles chat data is set by your Claude plan and settings.

Bring Claude. Keep your memory.

Connect your apps to Harness, add it to Claude, and ask who owes you money. Seven days free.

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