DATEV — Application Owner Setup

Prerequisites

DATEV requires formal partner certification before you can access their APIs. This is NOT a self-service process.

Register at the DATEV Developer Portal: https://developer.datev.de/en
Create an Enterprise Organization in the portal
Apply for Schnittstellenanbieter (Interface Partner) status
- Contact your DATEV partner manager
- They will guide you through the application
Receive Client ID and Client Secret after approval
Implement and self-test in the sandbox environment
Book a certification appointment with DATEV
Pass technical certification — DATEV reviews your integration
Go live with production credentials

Expect 4-12 weeks from application to production access, depending on DATEV's review queue.

Setting	Value
Authorization URL (Sandbox)	`https://login.datev.de/openidsandbox/authorize`
Authorization URL (Production)	`https://login.datev.de/openid/authorize`
Token URL (Sandbox)	`https://login.datev.de/openidsandbox/token`
Token URL (Production)	`https://login.datev.de/openid/token`
Token Lifetime	15 minutes (900 seconds)
Refresh Token Lifetime	11 hours (standard) or 2 years (with `offline_access` scope)
Token Request Content-Type	`application/x-www-form-urlencoded`

Scope	Purpose
`openid`	OpenID Connect (required)
`offline_access`	Long-lived refresh tokens (strongly recommended)
`datev:accounting:clients`	List Mandanten
`datev:accounting:extf-files`	Upload EXTF CSV files
`datev:accounting:documents`	Upload documents to Belege Online
`datev:accounting:dxso-jobs`	Upload XML invoice data

Every API request must include:

Authorization: Bearer {access_token}
X-DATEV-Client-Id: {your_oauth_client_id}