# Transparent API

- [Introduction to Transparent API](/kpn-things/rsp/transparent-api/introduction.md): Explaining the Transparent APIs, providing GSMA v3.2 SOAP APIs.
- [Connecting to Transparent APIs](/kpn-things/rsp/transparent-api/connecting.md)
- [mTLS](/kpn-things/rsp/transparent-api/mtls.md): Explaining mutual TLS authentication.
- [Using profiles from other vendors](/kpn-things/rsp/transparent-api/using-profiles-from-other-vendors.md)
- [ES2 interface description](/kpn-things/rsp/transparent-api/es2.md)
- [ES4 interface description](/kpn-things/rsp/transparent-api/es4.md)