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ERP and accounting

Connect DATEV to Hypamoon

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

Possible

The check

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

Public API docs
Yes. The interface documentation on the DATEV developer portal is open without a partnership. Read the docs
A key you create yourself
No. Online APIs need a paid subscription on the developer portal, and DATEV reviews and approves the implemented interface against its specifications. datev.de
Versions or a changelog
Not confirmed.
How it signs in
OpenID Connect and OAuth 2.0 with the DATEV login of the tax adviser or client, who has to consent before an app gets data.
Webhooks
Not confirmed.
Hosting
Cloud and self-hosted
Condition
Online APIs need a paid developer subscription with per call costs, and DATEV must review the interface. Listing on the DATEV Marktplatz is a separate partnership with fees and admission criteria.

In practice

What it takes in a real DATEV administration.

Getting access
Register an organization on the DATEV developer portal, take a subscription for the online API you need, build and test the app, and get the interface approved by DATEV before production use.
Limits
None published.
Writing
Not confirmed. Depends on the API product; not confirmed from pages that could be opened.
Cost
Online APIs need a subscription and have per call costs that usually fall on the DATEV customer; Marktplatz partners pay a monthly base fee and a click price. datev.de

What you can build

Send bookkeeping data or documents from your own system to the tax adviser in DATEV, after DATEV has approved the interface.

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

  • DATEV signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for DATEV takes more work: ask your chat to check this first.
  • Desktop APIs run on the DATEV installation in the office network, so an adapter needs a secure connection into that network.
  • You can build a DATEV interface without becoming a Marktplatz partner. Marktplatz partners pay a monthly base fee and a fee per click, and DATEV checks their interfaces at regular intervals.

Try it in your chat

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

Say this in your chat

Build the Hypamoon recipe build-an-adapter for DATEV. API docs: https://developer.datev.de/de/products. 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.

DATEV 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 DATEV. 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 DATEV?

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

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