OAuth

OAuth (Open Authorization) is an open-standard authorization framework that enables secure, delegated access — allowing users to grant third-party applications permission to access their account data without sharing their credentials. In CRM integrations, OAuth is the authentication mechanism that allows connected applications — such as marketing platforms, calendar tools, or e-signature services — to interact with the CRM on a user's behalf, with access scoped to only the permissions explicitly granted. For enterprise IT teams, OAuth is the preferred integration authentication standard because it supports granular permission control, token expiration, and revocable access — allowing connected application permissions to be managed and audited without credential sharing.