API Reference

Reports

Generate daily revenue reports, DSFinV-K exports for German tax audits, and DATEV CSV files for your accountant. All endpoints require admin privileges.

Daily Report

Retrieve aggregated statistics for a single business day, including total revenue, order counts, payment method breakdown, and VAT totals.

GET/api/reports/dailyAdmin Only

Returns daily statistics for the specified date.

Query Parameters

Name	Type	Required	Description
`date`	`string`	Optional	Date in YYYY-MM-DD format. Defaults to today if omitted.

bash

curl https://api.possfer.com/api/reports/daily?date=2026-03-20 \
  -H "Authorization: Bearer <token>"

json

{
  __PH0__: "2026-03-20",
  __PH2__: 285430,
  __PH3__: 78,
  __PH4__: 142300,
  __PH5__: 143130,
  __PH6__: 12500,
  __PH7__: 2400,
  __PH8__: 180000,
  __PH9__: 34200,
  __PH10__: 60000,
  __PH11__: 4200,
  __PH12__: 78,
  __PH13__: 3659
}

DSFinV-K Export

Generate a DSFinV-K compliant export file covering a date range. The response is a downloadable archive containing all required CSV files.

German Tax Audit Requirement

The DSFinV-K (Digitale Schnittstelle der Finanzverwaltung fuer Kassensysteme) is the required export format for German tax audits (Kassennachschau). Tax authorities can request this data at any time, and your POS system must be able to produce it on demand. Ensure your date ranges cover the full audit period.

GET/api/reports/dsfinvkAdmin Only

Export transaction data in DSFinV-K format for German tax audit compliance.

Query Parameters

Name	Type	Required	Description
`from`	`string`	Required	Start date in YYYY-MM-DD format.
`to`	`string`	Required	End date in YYYY-MM-DD format (inclusive).

bash

curl https://api.possfer.com/api/reports/dsfinvk?from=2026-01-01&to=2026-03-31 \
  -H "Authorization: Bearer <token>" \
  -o dsfinvk_export.zip

DATEV Export

Download a DATEV-compatible CSV file for import into accounting software. Supports optional Kontenrahmen selection.

GET/api/reports/datev-exportAdmin Only

Downloads a DATEV CSV file for the specified date range.

Query Parameters

Name	Type	Required	Description
`from`	`string`	Required	Start date in YYYY-MM-DD format.
`to`	`string`	Required	End date in YYYY-MM-DD format (inclusive).
`kontenrahmen`	`string`	Optional	Kontenrahmen to use (e.g. SKR03, SKR04). Defaults to restaurant settings.

bash

curl https://api.possfer.com/api/reports/datev-export?from=2026-01-01&to=2026-03-31&kontenrahmen=SKR03 \
  -H "Authorization: Bearer <token>" \
  -o datev_export.csv