When creating and using an API, the Data Exchange Solution adds usage information.
On the data provider side:
On the data acquirer side:
When creating and using an API, the Data Exchange Solution adds usage information.
On the data provider side:
| X-DEP-API-CUSTOMER-REGISTRATION | Identification number of the organization (e.g. Company Registration number) in the header of the response | 
| X-DEP-API-CORRELATION-ID | Transaction Correlation ID | 
| X-DEP-API-REQUEST-MODE | |
| X-Forwarded-Host | Host requested in the original acquirer request | 
| X-Forwarded-Path | Path requested in the original acquirer’s request | 
| X-Forwarder-Prefix | Path original basis of the application, if any | 
| X-Forwarder-Scheme | Scheme of the URL of the original acquirer’s request | 
On the data acquirer side:
| X-Consumer-Rate-Limiting-Count-(time unit) | Number of queries made | 
| X-Consumer-Rate-Limiting-Remaining-(time unit) | Number of remaining queries | 
| X-Consumer-Rate-Limiting-Reset-(time unit) | Date of quota reset |