Contacts

The people in your address book.

You don't need contacts to send messages, but keeping them in sync means your team sees names in conversations, inbound messages and reports. A contact needs a number; name, email, groups and custom fields are optional.

To keep one contact per number, create with update_if_exists: true, which updates the existing contact instead of adding a duplicate. List endpoints are paginated and support search and sorting. See Contacts and groups.