# API Additional Resources
source: https://developer.mastercard.com/cross-border-services/documentation/additional-resources/index.md

This page provides additional information about some of the values required for some of the API fields.

* [**Sender Account URI**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-sender-acct-uri/index.md)
* [**Recipient Account URI**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-recipient-acct-uri/index.md)
* [**Government ID URI**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-government-uri/index.md)
* [**ISO Country Codes**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-iso-country/index.md)
* [**ISO Currency Codes**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-iso-currency/index.md)
* [**Date and Time Format**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-datetime-format/index.md)
* [**Additional Data Fields**](https://developer.mastercard.com/cross-border-services/documentation/additional-resources/common-additional-data/index.md)