Start a phone verification (SMS, Flashcall, or Call) via Sinch Verification API
Scanned 9/6/2026
Install to Claude Code
npx -y skills add sinch/sinch-plugins --skill sinch-api-verification-start --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: sinch-api-verification-start
description: Start a phone verification (SMS, Flashcall, or Call) via Sinch Verification API
---
# Start Phone Verification
Start a phone number verification using the Sinch Verification API. Supports SMS (PIN code), Flashcall (missed call), or Callout (voice TTS). Uses Application Key + Secret.
**IMPORTANT: Execute this command directly. Do NOT generate script files. Perform the API call immediately.**
## Input
- `--to` / `-t`: Phone number to verify (E.164) - required
- `--method` / `-m`: Verification method: sms, flashcall, or callout - required (default sms)
Arguments: $ARGUMENTS
## Instructions
**Execute these steps directly - do not write code or scripts:**
0. If $ARGUMENTS empty: ask for phone number and method (sms, flashcall, callout). Otherwise parse.
1. Validate: --to (E.164), --method (sms | flashcall | callout). Normalize method to lowercase.
2. Get VERIFICATION_APPLICATION_KEY and VERIFICATION_APPLICATION_SECRET from env (or shared Voice/Verification app credentials if documented). Verification API uses Application Key/Secret. If missing, report "Verification API is not configured. Set application key and secret for Verification app."
3. Request body: identity { type: "number", endpoint: "+E164" }, method.
4. POST https://verification.api.sinch.com/verification/v1/verifications with Basic Auth (application_key:application_secret), Content-Type application/json.
5. On success: "✅ Verification started" with verification ID. Tell user to share the code with the end user (SMS) or that Flashcall/Callout was triggered. Handle 400, 401, 429 with clear messages.
6. Handle all errors gracefully.
## Examples
```
/sinch-api-verification-start --to=+14155551234 --method=sms
/sinch-api-verification-start -t +14155551234 -m callout
```
## API Reference
- **Base URL**: https://verification.api.sinch.com/verification/v1
- **Endpoint**: POST /verifications
- **Auth**: Basic (application_key:application_secret)
- **Documentation**: https://developers.sinch.com/docs/verification/
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