Hi @abdur_siddiqui,

You did well reaching out — templates work slightly differently with our API than in Front: you'll first need to retrieve the template you need via our Get message template endpoint. This will give you the template's body. You can then use that body to send your message via our Create message or Create message reply endpoints. If you're not sure which message template you want to use, or its ID, you can leverage our List message templates and List teammate message templates endpoints.

I hope this helps!

Maxime