Start and verify a phone number using the Sinch Verification API.
domain: developers.sinch.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
POST https://verification.api.sinch.com/verification/v1/verifications with identity {type: number, endpoint: E.164 number} and method (sms, flashcall, callout, or whatsapp).
For callout, the API places a PSTN call and asks the user to press a digit to confirm — no code entry needed.
Set Accept-Language to localize SMS content where supported.
Check status with GET .../verifications/id/{id} or by number/reference.
Report a user-entered code with PUT .../verifications/id/{id} or .../verifications/number/{endpoint}.
Known gotchas
The 'seamless' (data) verification method requires contacting your Sinch account manager — it's not self-service.
reference values must be unique per verification request if you use them for correlation.
Minimum auth/verification level is configurable in the Sinch dashboard and affects which methods are attempted first.
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