--- title: "Connect DATEV to Hypamoon" description: "DATEV documents its API, but access goes through DATEV first. What it takes to connect it to Hypamoon, with sources." url: https://hypamoon.com/connect-to/datev --- 1. [Connect to](https://hypamoon.com/connect-to) 2. DATEV 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](https://www.datev.de/web/de/ueber-datev/das-digitale-oekosystem-von-datev/partnering/datev-marktplatz/faq-zum-datev-marktplatz/) **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](https://www.datev.de/web/de/marktplatz/datev-schnittstellen-anbieter) **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](https://www.datev.de/web/de/ueber-datev/das-digitale-oekosystem-von-datev/partnering/datev-marktplatz/faq-zum-datev-marktplatz/) ## 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](https://hypamoon.com/docs/adapters) ### 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](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20DATEV.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.datev.de%2Fde%2Fproducts.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) 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](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 1 November 2026. - [www.datev.de/web/de/ueber-datev/das-digitale-oekosystem-von-datev/partnering/datev-marktplatz/faq-zum-datev-marktplatz/](https://www.datev.de/web/de/ueber-datev/das-digitale-oekosystem-von-datev/partnering/datev-marktplatz/faq-zum-datev-marktplatz/) - [www.datev.de/web/de/marktplatz/datev-schnittstellen-anbieter](https://www.datev.de/web/de/marktplatz/datev-schnittstellen-anbieter) 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](https://hypamoon.com/support#contact). ## More in erp and accounting - [**Acumatica** Open](https://hypamoon.com/connect-to/acumatica) - [**AFAS Profit** Open](https://hypamoon.com/connect-to/afas-profit) - [**e-Boekhouden.nl** Open](https://hypamoon.com/connect-to/e-boekhouden) - [**Exact for Accountancy** Open](https://hypamoon.com/connect-to/exact-for-accountancy) - [**Exact Globe+** Possible](https://hypamoon.com/connect-to/exact-globe) - [**Exact Gripp** Possible](https://hypamoon.com/connect-to/exact-gripp) - [**Exact Multivers** Possible](https://hypamoon.com/connect-to/unit4-multivers) - [**Exact Online** Open](https://hypamoon.com/connect-to/exact-online) - [**FreshBooks** Open](https://hypamoon.com/connect-to/freshbooks) - [**Holded** Open](https://hypamoon.com/connect-to/holded) - [**Isah** Unknown](https://hypamoon.com/connect-to/isah) - [**Jortt** Open](https://hypamoon.com/connect-to/jortt) - [**KING Finance** Possible](https://hypamoon.com/connect-to/king-finance) - [**Lexware Office (lexoffice)** Open](https://hypamoon.com/connect-to/lexoffice) - [**Microsoft Dynamics 365 Business Central** Open](https://hypamoon.com/connect-to/dynamics-365-business-central) - [**Microsoft Dynamics 365 Finance and Operations** Open](https://hypamoon.com/connect-to/dynamics-365-finance-operations) - [**Microsoft Dynamics NAV** Open](https://hypamoon.com/connect-to/dynamics-nav) - [**Moneybird** Open](https://hypamoon.com/connect-to/moneybird) - [**Odoo** Open](https://hypamoon.com/connect-to/odoo) - [**Oracle NetSuite** Open](https://hypamoon.com/connect-to/oracle-netsuite) - [**Pennylane** Open](https://hypamoon.com/connect-to/pennylane) - [**QuickBooks Online** Open](https://hypamoon.com/connect-to/quickbooks-online) - [**Ridder iQ** Unknown](https://hypamoon.com/connect-to/ridder-iq) - [**Sage Accounting (Sage Business Cloud)** Unknown](https://hypamoon.com/connect-to/sage-accounting) - [**Sage Intacct** Possible](https://hypamoon.com/connect-to/sage-intacct) - [**SAP Business One** Open](https://hypamoon.com/connect-to/sap-business-one) - [**SAP S/4HANA** Open](https://hypamoon.com/connect-to/sap-s4hana) - [**sevDesk** Open](https://hypamoon.com/connect-to/sevdesk) - [**Simplicate** Open](https://hypamoon.com/connect-to/simplicate) - [**SnelStart** Possible](https://hypamoon.com/connect-to/snelstart) - [**Syntess Atrium** Closed](https://hypamoon.com/connect-to/syntess-atrium) - [**Twinfield** Possible](https://hypamoon.com/connect-to/twinfield) - [**Unit4 ERPx** Possible](https://hypamoon.com/connect-to/unit4-erpx) - [**Visma eAccounting** Possible](https://hypamoon.com/connect-to/visma-eaccounting) - [**Visma.net ERP** Possible](https://hypamoon.com/connect-to/visma-net-erp) - [**Wave** Possible](https://hypamoon.com/connect-to/wave) - [**Xero** Open](https://hypamoon.com/connect-to/xero) - [**Yuki (Nmbrs Accounting)** Unknown](https://hypamoon.com/connect-to/yuki) - [**Zoho Books** Open](https://hypamoon.com/connect-to/zoho-books) - [**BILL (Bill.com)** Open](https://hypamoon.com/connect-to/bill) - [**Brex** Open](https://hypamoon.com/connect-to/brex) - [**Expensify** Possible](https://hypamoon.com/connect-to/expensify) - [**Pleo** Possible](https://hypamoon.com/connect-to/pleo) - [**Ramp** Open](https://hypamoon.com/connect-to/ramp) [All 267 tools](https://hypamoon.com/connect-to) ## 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](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) 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. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=datev) Works in Claude and ChatGPT. [Add to Claude](https://hypamoon.com/connect?via=connect-to~datev#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~datev#chatgpt)