# DATEV Unternehmen Online — Accounting API: overview > Canonical URL: https://developers.apideck.com/apis/accounting/datev-unternehmen-online/overview DATEV Unternehmen Online is the cloud-based document exchange platform connecting German businesses with their tax advisors for accounting data exchange, document upload, and journal entry submission. - Status: beta - Authentication: oauth2 - **account type required:** DATEV Unternehmen Online client account; each connection is scoped to one Mandant (consultant-client ID, for example 455148-2). - **apideck credentials available:** true - **apideck credentials note:** For sandbox testing only; production needs your own DATEV Client ID and Secret from the partner process. - **authentication note:** Authorization Code with PKCE, via DATEV's OpenID Connect login. - **beta:** true - **consumer access level:** DUO account access granted by the consumer's tax advisor (Steuerberater). - **costs:** DATEV onboarding: EUR 1,500 + VAT (includes 4 hours of support), then EUR 210/hour + VAT. Per-call gateway fees are typically paid by the DATEV end customer. - **difficulty:** involved - **difficulty reason:** Partner Certification + Technical Review Required for Production - **environment notes:** - **description:** Purpose: build and self-test before DATEV's technical review. Credentials: Apideck's temporary shared sandbox credentials, or your own DATEV app once it subscribes to an API product. - **environment:** Sandbox - **description:** Obtaining production credentials from DATEV is a real, separate process gated by a passed technical review. Routing API calls to DATEV's production environment is not yet part of this connector's scope — sandbox is where builds and consumer connections currently run. - **environment:** Production - **external guides:** - **source:** DATEV - **title:** DATEV interface requirements and certification process - **url:** https://developer.datev.de/en/guides/interface-requirements - **source:** DATEV - **title:** Developer Portal onboarding and pricing help - **url:** https://developer.datev.de/en/help - **source:** DATEV - **title:** Accounting Documents API interface requirements - **url:** https://developer.datev.de/en/product-detail/accounting-documents/2.0/documentation/interface-requirements - **source:** DATEV - **title:** DATEV-Marktplatz: first steps to partner status - **url:** https://www.datev.de/web/de/berufsgruppenuebergreifend/ueber-datev/portfolio/oekosystem/partnering/datev-marktplatz/erste-schritte-zum-partnerstatus - **source:** Apideck - **title:** Virtual Webhooks - **url:** https://help.apideck.com/en/articles/4231234 - **source:** Apideck - **title:** Apideck Support - **url:** https://help.apideck.com/en/articles/7774658 - **important to know:** Creating journal entries, customers and suppliers is mapped to DATEV's EXTF CSV import, and that write path is not yet verified working end-to-end — confirm its current status with Apideck Support before you plan a rollout around it. Writes are asynchronous: journal entries and documents are handed to DATEV as batch jobs, so a pushed record can take time to appear in the tax advisor's system and there is no real-time write confirmation. Production approval is a one-way door: once it completes, the app cannot be rolled back to sandbox and no further DATEV API products can be added to it. Getting listed on the DATEV-Marktplatz is a separate, higher tier: DATEV only considers that application once your service is live with at least 25 customers and you can name 3 reference customers it may contact. DATEV Unternehmen Online is a document and data exchange hub between a business and its tax advisor, not a standalone accounting system: the tax advisor must have the relevant DATEV services activated for the client before there is anything to read or write. - **partnership note:** Mandatory Schnittstellenanbieter (interface partner) status via the DATEV Developer Portal, then a passed technical review before production. - **partnership portal name:** DATEV Developer Portal - **partnership required:** true - **partnership url:** https://developer.datev.de/en - **rate limits:** No published numeric limit. DATEV disallows round-the-clock polling and requires a sustained error rate under 10% once you are in production. - **responsibility matrix:** - **area:** Register on the DATEV Developer Portal - **customer:** ✓ - **apideck:** Support available - **area:** DATEV certification & production approval - **customer:** ✓ - **apideck:** Docs provided - **area:** Sandbox Self-Testing - **customer:** ✓ - **area:** Add Credentials to Apideck - **customer:** ✓ - **area:** Grant DUO Access - **consumer:** ✓ Via their tax advisor - **area:** Provide Mandant ID - **consumer:** ✓ From their tax advisor - **apideck:** Handles OAuth flow - **area:** Authorize Connection (OAuth) - **consumer:** ✓ - **apideck:** Maintains connector - **area:** Build via Unified API - **customer:** ✓ - **apideck:** ✓ Automatic - **area:** Token Refresh - **apideck:** Logs & alerts - **area:** Monitor Connections - **consumer:** ✓ Can revoke anytime - **customer:** ✓ Via Apideck Dashboard - **sandbox available:** true - **sandbox note:** Granted automatically once your DATEV app subscribes to an API product — no separate approval. - **supported resource categories:** - **name:** Companies & Ledger - **resources:** companies company-info ledger-accounts - **name:** Journal Entries & Documents - **resources:** journal-entries attachments - **name:** Reports - **resources:** balance-sheet - **name:** Customers, Suppliers & Tax Rates - **resources:** customers suppliers tax-rates - **webhooks:** Virtual webhooks — polled create and update events for ledger accounts, journal entries, customers, suppliers and tax rates. ## Supported resources [Accounting data model](/guides/accounting-data-model.md) - **custom field support:** false - **downstream id:** datev-companies - **downstream name:** Datev Companies - **id:** companies - **name:** Companies - **status:** beta - **custom field support:** true - **downstream id:** clients - **downstream name:** Clients - **id:** company-info - **name:** Company Info - **status:** live - **custom field support:** true - **downstream id:** general-ledger-accounts - **downstream name:** General Ledger Accounts - **id:** ledger-accounts - **name:** Ledger Accounts - **status:** live - **custom field support:** true - **downstream id:** accounting-sequences - **downstream name:** Accounting Sequences - **id:** journal-entries - **name:** Journal Entries - **status:** live - **custom field support:** false - **downstream id:** sums-and-balances - **downstream name:** Sums And Balances - **id:** balance-sheet - **name:** BalanceSheet - **status:** live - **custom field support:** false - **downstream id:** profit-and-loss - **downstream name:** Profit And Loss - **id:** profit-and-loss - **name:** ProfitAndLoss - **status:** live - **custom field support:** false - **downstream id:** trial-balance - **downstream name:** Trial Balance - **id:** trial-balance - **name:** Trial Balance - **status:** beta - **custom field support:** false - **downstream id:** tax-rate-accounts - **downstream name:** Tax Rate Accounts - **id:** tax-rates - **name:** Tax Rates - **status:** live - **custom field support:** false - **downstream id:** fiscal-periods - **downstream name:** Fiscal Periods - **id:** fiscal-periods - **name:** Fiscal Periods - **status:** beta - **custom field support:** true - **downstream id:** customer-accounts - **downstream name:** Customer Accounts - **id:** customers - **name:** Customers - **status:** live - **custom field support:** true - **downstream id:** supplier-accounts - **downstream name:** Supplier Accounts - **id:** suppliers - **name:** Suppliers - **status:** live - **custom field support:** false - **downstream id:** documents - **downstream name:** Documents - **id:** attachments - **name:** Attachments - **status:** live - **custom field support:** false - **downstream id:** invoices - **downstream name:** Invoices - **id:** invoices - **name:** Invoices - **status:** live - **custom field support:** false - **downstream id:** bills - **downstream name:** Bills - **id:** bills - **name:** Bills - **status:** live An omitted operation list does not establish operation support. Verify the selected operation in the coverage matrix. [API reference](https://developers.apideck.com/apis/accounting/reference.md) · [Coverage matrix](https://developers.apideck.com/apis/accounting/coverage)