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WhatsApp OTP API for Flutter Apps: Legacy URL
This URL is preserved from the earlier documentation rollout. The updated Flutter guide is available under the cleaner `/blog/whatsapp-otp-flutter` route and keeps the same production principle: Flutter calls your backend, and your backend calls DNZ.
WhatsApp OTP API FlutterFlutter WhatsApp verification
Use the updated guide
The recommended Flutter integration is backend-mediated. Do not place DNZ API keys inside a Flutter app bundle. Use your backend to generate the OTP, call DNZ, and verify the code.
Continue to the updated guide for code, setup steps, testing notes, and internal links.
Related content
Open the updated Flutter guide
Use the current production Flutter OTP guide.
Read Flutter guide