Infobip API
Infobip global omnichannel communication platform API — send SMS, WhatsApp, email, voice, and OTP messages across 190+ countries from a single API.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
HMAC webhook verification. TLS enforced for all API calls. SOC2 Type II, ISO 27001 certified. GDPR compliant. Single API key is a security weakness — no per-key scoping.
⚡ Reliability
Best When
Enterprise agents need reliable global multi-channel messaging (SMS + WhatsApp + voice) with enterprise SLA and 24/7 support.
Avoid When
You only need SMS and want the simplest possible API — Twilio or Vonage are easier to start with.
Use Cases
- • Sending OTP and 2FA verification codes via SMS, WhatsApp, or voice from agent authentication flows
- • WhatsApp Business API messaging for customer notifications and conversational flows
- • Bulk SMS campaigns and transactional SMS from agent marketing or notification workflows
- • Email delivery with templates and tracking for agent-generated communication
- • Number lookup and HLR queries to validate phone numbers before sending messages
Not For
- • Developers needing a simple SMS-only API — use Twilio or Vonage for simpler SMS
- • Teams without enterprise communication volume — Infobip is enterprise-positioned
- • Low-cost bulk messaging at scale — pricing is premium compared to carriers directly
Interface
Authentication
API Key as Basic Auth (username=API key, password ignored) or Bearer token. Single API key for all channels. Webhook signature verification via HMAC.
Pricing
Enterprise pricing negotiated. Trial credits available without credit card. Contact sales for high-volume rates.
Agent Metadata
Known Gotchas
- ⚠ WhatsApp templates must be pre-approved by Meta (24-72 hours) before agents can send templated messages
- ⚠ Delivery reports are async via webhook — agents cannot synchronously confirm delivery
- ⚠ Different API endpoints for SMS vs WhatsApp vs email — not a single unified send endpoint
- ⚠ Phone numbers must be in E.164 format including country code — validation recommended before sending
- ⚠ WhatsApp Business Account verification required before production use — cannot skip for production
Alternatives
Full Evaluation Report
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Scores are editorial opinions as of 2026-03-06.