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Specification sheet · Communication APIs (CPaaS)

Dollu Ltd

dollu.com

[email protected]

+91 777-500-2222

Verify API (OTP & 2FA)

One endpoint to verify a phone number, email or device - SMS, voice, WhatsApp, flash call, email and silent network authentication, with automatic failover and fraud controls built in.

Phone and identity verification via one API: OTP over SMS, voice, WhatsApp, flash call and email, silent network authentication, auto failover and AIT fraud protection.

Verification channels
6
Countries covered
200+
Median OTP delivery
< 5 s

At a glance

  • Two calls: POST /v2/verifications and POST .../check
  • SMS, voice, WhatsApp, flash call, email and silent network auth
  • Automatic channel failover on configurable timers
  • AIT and fraud protection: velocity limits and country shields
  • Built-in number lookup and HLR before every send
  • Pre-registered sender IDs; DLT, 10DLC and GDPR compliant
  • Templates in 40+ languages; custom code length and TTL
  • Conversion analytics per country, channel and operator

Typical use cases

  • 01Sign-up and login 2FA
  • 02Transaction confirmation and PSD2 SCA
  • 03Account recovery and device change
  • 04Marketplace and gig-economy trust
  • 05Passwordless authentication

Technical & commercial specifications

EndpointsPOST /v2/verifications; POST /v2/verifications/{id}/check; GET /v2/lookup/{number}
ChannelsSMS, voice, WhatsApp, flash call, email, silent network authentication
Coverage200+ countries for SMS/voice; SNA on participating operators in 30+ countries
Code options4–10 digits or alphanumeric; TTL 30 s to 15 min; configurable attempt limit
Languages40+ template languages; custom brand name and app hash
Fraud controlsVelocity limits, AIT detection, premium/unallocated blocking, country shields
Webhooksverification.sent, delivered, approved, expired, failed; HMAC-SHA256 signed
SDKsNode.js, Python, Java, Go, PHP, .NET
ComplianceGDPR, ISO 27001, SOC 2, DLT, 10DLC, PSD2 SCA dynamic linking
BillingPer successful verification or per attempt; lookups billed per query

Talk to Dollu about Verify API

Send us your destinations, volumes, sites or use case and we will return a proposal, pricing and a technical plan within one business day. Test credentials and the full service description and SLA document are available on request.

Contact sales online
Sales
[email protected]
Phone
+91 777-500-2222
Web
dollu.com
NOC
[email protected] · 24×7

Dollu Ltd · 2403A, Iconic Corenthum, Sector 62, Noida 201301, India. This sheet summarises the standard service; specifications may vary by country and are confirmed in the service order.

Online version: https://dollu.com/services/cpaas/verify-api