Connect 23 Telecom to CleverTap

Setup type	Generic SMS · self-service
Setup time	About 15 minutes
Sends SMS	Yes
Delivery status in CleverTap	In 23 Telecom; in-platform option scoped during activation
Who can configure	CleverTap admin with channel settings access

Status: Managed activation

23 Telecom supports CleverTap through its Generic SMS provider. Start with the sandbox recipe below; when you’re ready to launch, your account manager enables live sending and completes a short configuration check for response handling, idempotency and delivery reporting. On the current batch endpoint, confirm results[0].status is "accepted" with a non-empty results[0].message_id.

What this connection does

You add 23 Telecom as a Generic SMS provider in CleverTap (not a generic Webhook). CleverTap sends the message directly to the 23 Telecom API; carrier delivery reports stay in 23 Telecom until the CleverTap DLR adapter is enabled.

Before you start

• An active workspace, an approved sender ID and an E.164 test number, e.g. +447911123456.
• A restricted 23 Telecom API key with only sms.send — start with a sandbox sk_test_ key (Sandbox & test mode).

POST  /api/v1/sms/send-individual  · Permission: sms.send

Connect 23 Telecom

1. Go to Settings → Engage → Channels → SMS → Add Provider → Other (Generic).

2. Set method POST and the URL https://restlink23telecom.com/api/v1/sms/send-individual, and add the header X-API-Key.

3. Map CleverTap’s send variables into the body and idempotency header using the table below. Use non-batch mode.

4. Save, then send a test to your E.164 number.

Direct-send field mapping

CleverTap	23 Telecom
$$To	messages[0].to (E.164)
$$Body	messages[0].message
$$MessageID	Idempotency-Key header
custom sender variable	messages[0].sender_id (approved sender ID)
Header	X-API-Key (your restricted key)

The exact Save / Test UI labels are confirmed against your tenant before you rely on this page.

Send a test

Send a test with your sk_test_ key to your E.164 number. For the test, set Idempotency-Key to a fixed value such as clevertap-sandbox-001 (production maps it to $$MessageID).

A 2xx is not acceptance — check the response body

A 200 only means the request was received. Treat the message as queued only when results[0].status is "accepted" and results[0].message_id is present. blocked_country is not queued. Missing local pricing is different: valid live API traffic is accepted fail-open, and the delivery report supplies the final status and cost. If the body is not an acceptance, do not auto-retry until the 23 Telecom message log confirms that no message was accepted.

Idempotency & delivery reporting

Map $$MessageID — which is unique per message — to the Idempotency-Key header so a retry never sends a second SMS. Full delivery reporting inside CleverTap needs CleverTap’s callback contract (returning $$MessageID as meta plus a delivered/failed/replied/clicked event), which the 23 Telecom team enables as a managed adapter. Until then, direct sending works and delivery status is read in 23 Telecom.

Production activation

Live traffic uses managed activation because CleverTap branches on the HTTP response. Your 23 Telecom team confirms a retry-safe path using the strict integration endpoint, where a 2xx guarantees acceptance, or an adapter that validates the response body. Delivery tracking remains available in 23 Telecom; an in-platform DLR option can be scoped during activation.

The activation package includes the approved production URL or adapter mapping, the restricted key and a one-message launch check. Apply that configuration — rather than changing only the API key on the sandbox batch template — and then publish the campaign.

Verify the result

Accepted means queued. Read carrier delivery in Message status or Statistics, or add a live delivery webhook.

Troubleshooting

Response	Cause & fix
400 IDEMPOTENCY_KEY_REQUIRED	Map $$MessageID to Idempotency-Key
401 INVALID_API_KEY	Wrong or disabled key in the header
403 NO_SMS_ACCESS	SMS not enabled — contact 23 Telecom
429 RATE_LIMIT_EXCEEDED	Above your budget — slow the campaign

Need help?

• Provider setup, variables or DLR callback — CleverTap support and, for the DLR adapter, your 23 Telecom team.
• API key, sender ID, accepted-but-not-delivered — your 23 Telecom account manager, or the contact form.

Official platform documentation

• CleverTap Generic SMS

Last verified: 16 July 2026.