Im completely new to SOAP API's, I've been working with REST API's. I think I've read the documentation of Sabre APIs but i was unable to find the respective endpoints for the SOAP API's.
I tried contacting Sabre but they are not responding to my messages. I was provided the credentials and base url, but i got stuck from the start. Couldn't event find the endpoint for access token.
SOAP/REST Endpoints
Token endpoint is here for SOAP
Certification/Test:
https://webservices.cert.platform.sabre.com 
Production:
https://webservices.platform.sabre.com
Certification/Test:
https://api.cert.platform.sabre.com
Production:
https://api.platform.sabre.com
Token Test Endpoint
https://webservices.cert.platform.sabre.com/v3/auth/token
Token Production Endpoint
https://webservices.platform.sabre.com/v3/auth/token
I have no credential but got this response from Postman. It means test endpoint works.
You can download Soap APIs postman collection here.