The Messagebird Contacts API allows you to manage contacts that are identified by a unique random ID. Use this ID to create, view, update or delete contacts. The API uses HTTP verbs and a RESTful endpoint structure with an access key that is used as the API Authorization. Request and response payloads are formatted as JSON using UTF-8 encoding and URL encoded values. MessageBird is a software telecom service for SMS, Chat and Voice API's that connect you to 7 billion phones globally.