/send_sms. You submit message details as a JSON
payload and the platform delivers to the recipients.
For destinations outside India, use the
International SMS List API — a different host, a
different authentication scheme, and no DLT fields.
Endpoint
Authentication
Anapikey HTTP header carrying your account’s API key — see
API keys.
string
required
Your OneXtel API key.
string
required
application/jsonDLT is mandatory
Indian SMS traffic is regulated by TRAI’s DLT framework. Every message must reference a registered entity, sender ID, and template, supplied on the send asentityId and templateId.
Messages that fail these checks are rejected before they reach an operator — see
DLT registration and the 201–227 band in
SMS error codes.
How it compares to international SMS
Endpoints at a glance
Next steps
- Send SMS — India — payload, DLT fields, and responses
- DLR callback — the receipt posted to your URL
- SMS error codes — what each
errorCodemeans