Identity is central to creating a great, personalized Messenger experience. To help you accomplish this, the Messenger Platform provides a set of APIs to help you do everything from finding your current customers on messenger, to providing a consistent experience across multiple Facebook apps and Pages you control, to retrieving basic profile information to personalize messages.
Use a PSID to retrieve a person's profile information to personalize the conversation and provide a unique experience.Learn More →
Identify a person consistently across every Facebook app and Page you own with ID Matching. One app-scoped or page-scoped ID is all you need.Learn More →
Use your web-based login flow to authenticate a person's identity and link it with their Messenger account to securely add more features and information to the conversation.Learn More →