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ERP and accounting

Connect Merit Aktiva to Hypamoon

Yes, with one catch. Merit Aktiva has an open API that you can use yourself, but it signs in with OAuth only, and that takes more work in a Hypamoon adapter today.

Open

The check

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

Public API docs
Yes. Read the docs
A key you create yourself
Yes. You create the API id and API key yourself under Settings, API settings. api.merit.ee
Versions or a changelog
Yes. Versioned paths (/api/v1/), dated changes and a change log page. api.merit.ee
How it signs in
Each call carries your API id, a UTC timestamp and an HMAC SHA256 signature made with your API key.
Webhooks
Not confirmed.
Hosting
Cloud

In practice

What it takes in a real Merit Aktiva administration.

Getting access
Create an API id and API key in Merit Aktiva under Settings, API settings.
Limits
100 requests per minute; documents up to 500 rows. api.merit.ee
Writing
Read and write. Write documents such as invoices, orders, offers and ledger entries directly into the company.
Cost
Not published.

Your own customer and invoice flow on Merit Aktiva, built around how your business runs.

  • Customers, invoices, offers, orders and ledger entries, straight from Merit Aktiva.
  • AI that drafts invoices from orders and spots customers who start paying late, with you approving every document.
  • A screen for your team and a short weekly email for you.

Ask your chat

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

  • Which customers have invoices more than 30 days overdue?
  • What did we invoice per customer this quarter?

On a schedule

Merit Aktiva has no webhooks we could confirm, so an agent checks every 15 minutes and decides what happens next.

  1. Every 15 minutes

    New orders in your own system that have no invoice in Merit Aktiva yet.

    AI decides

    AI checks the customer, prices and VAT and prepares the invoice.

    Then

    The invoice is created in Merit Aktiva after you approve it.

    AI proposes, you approve

A screen for your team or customers

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

  • For your customers

    Customers sign in and see their open invoices and offers, straight from Merit Aktiva.

Add Hypamoon

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

  • Agent on a schedule

    Once a week, an agent emails you the customers who pay later than they used to.

Merit Aktiva 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 Merit Aktiva waits for your approval, one call at a time. How adapters work

Good to know

  • Merit Aktiva signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for Merit Aktiva takes more work: ask your chat to check this first.
  • 100 requests per minute, with a 429 and a Retry-After header above that. Documents can have at most 500 rows. Merit advises a separate free company for testing.

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 Merit Aktiva. API docs: https://api.merit.ee/. 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.

Merit Aktiva 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 Merit Aktiva. 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 Merit Aktiva?

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

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