ERP and accounting
Connect Exact Multivers to Hypamoon
Possible, with help from Exact Multivers. The API is documented, but you cannot just create a key: access goes through Exact Multivers first.
PossibleThe check
Three questions about the API of Exact Multivers, answered from its own docs.
- Public API docs
- Yes. Read the docs
- A key you create yourself
- No. You request a portal account, Exact must activate your app, and production access comes after Exact validates your sandbox use. api.boekhoudgemak.nl
- Versions or a changelog
- Yes. Each API version has its own endpoint, for example /v22. api.boekhoudgemak.nl
- How it signs in
- OAuth 2.0 with an application identifier and secret that you get after Exact activates your app.
- Webhooks
- Not confirmed.
- Hosting
- Cloud
- Condition
- Needs an account request and app activation by Exact.
In practice
What it takes in a real Exact Multivers administration.
- Getting access
- The developer registers on the Exact Multivers WebAPI portal with a project description, Exact creates a sandbox and activates the app; the customer then signs in once to authorise it.
- Limits
- None published.
- Writing
- Read and write. Create (POST), change (PUT) and remove objects such as customers through the REST API; info objects and lists are read only.
- Cost
- The developer portal says it is free of charge for developers; the customer needs a Multivers subscription. api.boekhoudgemak.nl
What you can build
Create customers and sales invoices in Exact Multivers from your own order or planning tool, and ask your chat for open items per customer.
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
- Exact Multivers signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for Exact Multivers takes more work: ask your chat to check this first.
- Unit4 Multivers is now sold by Exact as Exact Multivers.
Try it in your chat
First get access from Exact Multivers. Then fill in what to read and write, and send it.
Build the Hypamoon recipe build-an-adapter for Exact Multivers. API docs: https://api.boekhoudgemak.nl/V21/Documentation/Guide/Environments. Read: [what]. Write: [what, or nothing].
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.
Exact Multivers 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 Exact Multivers. Found something that changed? Tell us at support.
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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.
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.
Fill in the name of your software. Checking needs no connection to Hypamoon.
Ready to connect Exact Multivers?
Connect your chat once, then ask it to build the adapter.
Works in Claude and ChatGPT. Add to Claude Add to ChatGPT