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API v2 is deprecated and will be sunset on November 1, 2026. Use API v3 for all new integrations.
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Welcome to the Heyy API

The Heyy API is a REST API that lets you build rich messaging experiences on top of Heyy. Use it to:
  • Send and receive messages across your connected channels.
  • Manage contacts, chats, broadcasts, and more.
  • Automate repetitive workflows and integrate Heyy with your existing tools.
Whether you are adding a simple integration or building a full customer messaging platform, this documentation will help you get started quickly and stay productive.