Skip to content
Hypamoon
Works in Claude and ChatGPT Start free

ERP and accounting

Connect Visma eAccounting to Hypamoon

Possible, with help from Visma eAccounting. The API is documented, but you cannot just create a key: access goes through Visma eAccounting first.

Possible

The check

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

Public API docs
Yes. Read the docs
A key you create yourself
No. You must register as a partner to get credentials and a sandbox; production access is granted on request by API support. developer.vismaonline.com
Versions or a changelog
Yes. Version 2 in the URL and a dated changelog. developer.vismaonline.com
How it signs in
OAuth 2.0 through the Visma identity server; access tokens last 60 minutes and refresh tokens two years.
Webhooks
Not confirmed.
Hosting
Cloud
Condition
Needs partner registration, and production access is granted on request.

In practice

What it takes in a real Visma eAccounting administration.

Getting access
The developer registers in the Visma (Spiris) partner programme to get a client ID and sandbox, asks API support for production access, and the customer then signs in once with Visma to approve the app.
Limits
600 requests per minute per client and per endpoint; over the limit you get HTTP 429. developer.vismaonline.com
Writing
Read and write. Create and update customers and create customer invoice drafts.
Cost
Visma's Dutch partner page says the API is free to use, with no limit on the number of integrations. nl.visma.com

What you can build

Create the customer and a draft invoice in eAccounting as soon as a job is marked done in your planning tool, so the invoice is ready to check and send.

Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. How adapters work

Good to know

  • Visma eAccounting signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for Visma eAccounting takes more work: ask your chat to check this first.
  • Limit of 600 requests per minute per client and endpoint. The developer docs now use the name Spiris.

Try it in your chat

First get access from Visma eAccounting. Then fill in what to read and write, and send it.

Say this in your chat

Build the Hypamoon recipe build-an-adapter for Visma eAccounting. API docs: https://developer.vismaonline.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 1 November 2026.

Visma eAccounting 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 Visma eAccounting. Found something that changed? Tell us at support.

More in erp and accounting

All 267 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 Visma eAccounting?

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

Start free

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