Developer API
REST endpoints for messages, contacts and templates. Send WhatsApp messages,
manage subscribers and labels, and read your catalog from your own code.
MCP server
Connect Claude, ChatGPT or Cursor to your account. Then ask your AI app to
send messages, update contacts and read conversations in plain English.
Start with the Developer API
1
Understand the API
Understanding the Developer API: a beginner’s guide to
what it is, how it works and where your code calls it.
2
Make your first request
Introduction: the base URL, your
apiToken and
the response shape every endpoint returns.3
Find your IDs
Finding your IDs and API token: where to get your
apiToken, phone_number_id, template IDs and the other values the endpoints ask for.Or connect an AI app
Which AI app should I use? compares the apps the MCP server works with. Then get your API key and follow the setup page for your app.Looking for how to use ChatSyncs itself, such as connecting your number, building
bots, sending broadcasts or running a shared inbox? Those step-by-step guides are in
the ChatSyncs Help Center.