WhatsApp Templates API

10. Send approved template

Public Developer API for Meta template lifecycle on Cloud WhatsApp accounts. Same Meta engine as the Washeej dashboard. Access requires explicit template scopes; Device/QR management is rejected. Provider Meta delete stays deferred.

1. Overview

2. Authentication & scopes

3. Account capabilities

4. Validate a template

5. Create and submit

6. List and inspect status

7. Sync

8. Edit

9. Delete

10. Send approved template

11. Status webhooks

12. Error codes

13. Rate limits

14. Idempotency

15. Migration from /templates/send

Send approved template

Dual-surface endpoints (same contract):

POST /v1/templates/send
POST /external-api/templates/send

Cloud + approved/sendable + exact language + sequential params. Delivery status continues via message webhooks (wamid).

Idempotency-Key (required)

Idempotency-Key header is required on these lifecycle/send dual-surface paths.
Missing key → 422 idempotency_key_required (no Meta/provider call).
Same key + same payload → original persisted result (replay).
Same key + different payload → 409 idempotency_conflict (payload_mismatch).
In-flight same key → 409 idempotency_in_flight with retryable=true.
Provider outcome unknown → provider_outcome_unknown; Washeej does not blindly resubmit to Meta.

Legacy inbox send (compatibility)

POST /external-api/inbox/send-template-message remains supported for existing Cloud integrators. It keeps the legacy response envelope and does not require Idempotency-Key. New integrations should prefer /v1/templates/send or /external-api/templates/send with durable idempotency.

curl -X POST "https://app.washeej.com/v1/templates/send" \
  -H "client-id: YOUR_CLIENT_ID" \
  -H "client-secret: YOUR_CLIENT_SECRET" \
  -H "Idempotency-Key: send-$(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{
    "template_id": "YOUR_TEMPLATE_ID",
    "mobile_code": "966",
    "mobile": "500000000",
    "whatsapp_account_id": YOUR_CLOUD_ACCOUNT_ID,
    "body_variables": ["Ahmed"]
  }'