ERP and accounting
Connect KING Finance to Hypamoon
Possible, with help from KING Finance. The API is documented, but you cannot just create a key: access goes through KING Finance first.
PossibleThe check
Three questions about the API of KING Finance, answered from its own docs.
- Public API docs
- Yes. The KING Finance API (called Cloudswitch, from the iMUIS Online days) has a public knowledge base with function descriptions and SoapUI examples. Read the docs
- A key you create yourself
- No. Partner only: you register as a partner, are assessed, sign a partner agreement and then get a partner key. A customer cannot create a key on its own. apps.imuisonline.com
- Versions or a changelog
- Yes. Release notes with version numbers (for example 4.5.6 and 4.7.0). apps.imuisonline.com
- How it signs in
- SOAP login with a partner key from Bjorn Lunden plus an environment code per administration; the login returns a session that closes after 30 minutes without activity.
- Webhooks
- Not confirmed.
- Hosting
- Cloud
- Condition
- Needs a signed partner agreement with Bjorn Lunden before you get a partner key.
In practice
What it takes in a real KING Finance administration.
- Getting access
- A developer first becomes a partner of Bjorn Lunden and gets a partner key. The owner of the administration then activates the app per administration in the KING Finance app store, which creates the environment code the app logs in with.
- Limits
- Sessions close after 30 minutes without activity (an accountant can change this). Live calls only from IP addresses you registered with Bjorn Lunden. Lists are paged. apps.imuisonline.com
- Writing
- Read and write. The SOAP functions include creating and updating records, such as master data (CreateStamTabelRecord), next to functions for financial, sales, quote and purchase data.
- Cost
- Not published.
What you can build
A web intake that creates the customer and the booking in KING Finance, once a partner key is in place, so nobody types it over.
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
- 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.
- KING Finance is the former iMUIS Online and is now sold by Bjorn Lunden. The separate KING ERP product has its own REST API at api.king.eu. Calls are only accepted from IP addresses you register with Bjorn Lunden.
Try it in your chat
First get access from KING Finance. Then fill in what to read and write, and send it.
Build the Hypamoon recipe build-an-adapter for KING Finance. API docs: https://apps.imuisonline.com/. 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.
- apps.imuisonline.com/
- apps.imuisonline.com/muis-apps/partner-worden-muis-apps/
- apps.imuisonline.com/categorieen/release-notes/
- apps.imuisonline.com/muis-apps/inlogggen-uitloggen-keepsession/
KING Finance 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 KING Finance. 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 KING Finance?
Connect your chat once, then ask it to build the adapter.
Works in Claude and ChatGPT. Add to Claude Add to ChatGPT