> For the complete documentation index, see [llms.txt](https://docs.nexusglobalpayments.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nexusglobalpayments.org/nexus-payments-apis.md).

# Nexus Payments APIs

- [Countries](https://docs.nexusglobalpayments.org/nexus-payments-apis/countries.md)
- [Address Types](https://docs.nexusglobalpayments.org/nexus-payments-apis/address-types.md)
- [Financial Institutions](https://docs.nexusglobalpayments.org/nexus-payments-apis/financial-institutions.md)
- [Quotes](https://docs.nexusglobalpayments.org/nexus-payments-apis/quotes.md)
- [Fees And Amounts](https://docs.nexusglobalpayments.org/nexus-payments-apis/fees-and-amounts.md)
- [ISO 20022 Messages](https://docs.nexusglobalpayments.org/nexus-payments-apis/iso-20022-messages.md)
- [Connectivity](https://docs.nexusglobalpayments.org/nexus-payments-apis/connectivity.md)
- [Models](https://docs.nexusglobalpayments.org/nexus-payments-apis/models.md)
- [Additional optional APIs](https://docs.nexusglobalpayments.org/nexus-payments-apis/additional-optional-apis.md)