Developers
How to test an SMS OTP flow: a checklist beyond “the code arrived”
Test OTP destination input, leading zeros, resend, late messages and uncertain purchases with isolated fixtures and bounded live checks.
SMS.Red
Developers
SMS.Red guides in Developers.
Developers
SMS API purchases: idempotency keys, price ceilings and timeout recovery
Persist purchase intent, approve a USD price ceiling and reconcile SMS.Red timeouts with one idempotency key instead of buying twice.
Developers
SMS webhooks vs polling: receive messages quickly and reconcile safely
Combine signed SMS.Red webhooks with paginated message reads, deduplicate events and reconcile delivery without exposing verification secrets.
Developers
SMS.Red API for virtual numbers
The dashboard and the API buy the same numbers. Use Developers when a human should not click Buy.
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