> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SAP writeback

> Write data from Cognite Data Fusion (CDF) back to SAP systems.

The SAP writeback APIs let you send data from CDF to SAP systems. Register SAP instances, configure endpoints and schema mappings, and submit writeback requests. Use these APIs to create bidirectional workflows that update SAP with data from CDF.

## APIs in this group

* [SAP instances](/api-reference/concepts/20230101/sap-instances) — Register connections to SAP systems
* [SAP endpoints](/api-reference/concepts/20230101/sap-endpoints) — Define SAP function modules or BAPIs to target
* [Schema mappings](/api-reference/concepts/20230101/sap-schema-mappings) — Map CDF data to SAP structures
* [Writeback requests](/api-reference/concepts/20230101/writeback-requests) — Submit data to SAP endpoints