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The WhatsApp API creates templates, submits them to Meta for approval, sends messages against the approved ones, and reports delivery back. Every call is a JSON request over HTTPS, authenticated with your OneXtel API key. Start by copying your API key from the portal. Templates have to be approved before a campaign can use them, so create those first — the endpoints below cover both halves.

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Base URL

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Authentication

All requests require a valid API key in the header:
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string
required
API key generated for the TUC associated with the given phone number. Example: 7pvxoA4c

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Endpoints at a glance

Delivery receipts and inbound messages are pushed to your configured endpoint — see Delivery Notification and the Callback Events overview.

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Template workflow

1

Upload media (optional)

If your template uses an image, video, or document header, upload the file via the Media Upload endpoint to generate a media ID.
2

Create the template

Submit the template definition to the Create Template API with the appropriate category — AUTHENTICATION, UTILITY, or MARKETING.
3

Check approval status

Use the Fetch Template API to confirm the template status is Approved.
4

Send messages

Send the approved template to recipients via the Send Template Message API.
5

Track delivery

Track messages via Delivery Notification callbacks, the Status Check API, or the History API.