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ERP and accounting

Connect Payhawk to Hypamoon

Yes. Payhawk has a public, versioned API and you create the key yourself, so your chat can write the adapter.

Open

The check

Three questions about the API of Payhawk, answered from its own docs.

Public API docs
Yes. Payhawk points to its API reference on developers.payhawk.com. Read the docs
A key you create yourself
Yes. The API key is in the Payhawk Portal under Account, Settings; if it is not activated yet, Payhawk activates it on request. payhawk.com
Versions or a changelog
Yes. Versioned API (v3 in the base address). payhawk.com
How it signs in
An API key from the Payhawk Portal settings, sent with each request to api.payhawk.io.
Webhooks
Yes. It can tell your app when something changes. payhawk.com
Hosting
Cloud

Your own expense overview on Payhawk, built around how your team spends.

  • Card expenses, receipts, suppliers and accounts, straight from Payhawk.
  • AI that checks each expense and proposes the category and cost centre, with a person approving.
  • A screen for budget owners and a weekly email for finance.

Ask your chat

Answers straight from your Payhawk data, in Claude or another chat with the full Hypamoon connection.

  • Which card expenses from this month still have no receipt?
  • Which suppliers did we pay most this quarter?

When something happens

Payhawk sends a webhook to your app, and the app asks AI what happens next.

  1. When

    A new expense is created in Payhawk.

    AI decides

    AI reads the receipt and checks amount, VAT and category against earlier expenses.

    Then

    Finance gets an email when something looks off.

A screen for your team or customers

An app on your own address, with sign-in, on top of the same Payhawk data.

  • For your team

    Budget owners see their team's expenses and missing receipts per month.

Add Hypamoon

Text messages, email, phone, payments and agents run in the same project as the adapter.

  • Email

    Employees get one reminder email with the receipts they still need to add.

Payhawk stays the core: your chat builds the rest on its API, as an adapter plus an app and agents in your Hypamoon project. Reading starts after you click Allow in the portal. Every change an agent or a chat makes in Payhawk waits for your approval, one call at a time. How adapters work

Good to know

  • Your adapter uses a fixed key: you paste it once in the Hypamoon portal, never in the chat, and it only goes to the API host you allow.
  • The API allows 15 requests per second. A development sandbox is available on request.

Try it in your chat

Fill in what to read and write, and send it.

Say this in your chat

Build the Hypamoon recipe build-an-adapter for Payhawk. API docs: https://developers.payhawk.com/. Read: [what]. Write: [what, or nothing].

Open in Claude

In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. The full recipe

Sources

Checked on 7 November 2026.

Payhawk is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with Payhawk. Found something that changed? Tell us at support.

More in erp and accounting

All 1094 tools

Tool not listed? Ask the chat to check its API.

The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found.

Say this in your chat

Check if [software] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used.

Open in Claude Open in ChatGPT

Fill in the name of your software. Checking needs no connection to Hypamoon.

Ready to connect Payhawk?

Connect your chat once, then ask it to build the adapter.

Start free

Works in Claude, ChatGPT and Copilot. Add to Claude Add to ChatGPT Add to Copilot