SMS APIs Built for Product and Engineering Teams
Ship OTP, alerts, and lifecycle messaging from your app with low-latency APIs, webhooks, and observability—so your team stays focused on the core product.
Technology SMS use cases
SaaS, fintech apps, marketplaces, and internal tools
Auth and 2FA
One-time passwords and step-up verification with dedicated transactional routes and high success rates.
Product notifications
Billing receipts, usage warnings, seat invites, and workspace alerts triggered from your backend.
Webhooks and events
Subscribe to delivered, failed, and clicked events to reconcile state in your own databases.
Multi-tenant SaaS
Issue API keys per customer environment and map sender IDs to each tenant’s brand.
Incident comms
Status page companion messages for severity-1 outages and maintenance windows.
CI/CD friendly
Sandbox keys, environment separation, and predictable error codes for automated testing.
Why engineering teams pick sms2connect
Documentation your developers can follow, predictable JSON, and support that speaks API—not just marketing.
API traffic growth
Monthly API requests vs. successful message deliveries
Message categories
Developer platform features
Structured logging
message_id on every response for traceability across retries and support tickets.
Batch send
Upload JSON arrays for controlled throughput without hammering your workers.
Template IDs
Reference pre-approved templates to speed compliance review for regulated flows.
IP allowlists
Lock down production keys to your NAT egress for defense in depth.
Usage dashboards
See per-key consumption, error ratios, and operator breakdowns.
Playground snippets
Copy curl, Node, and PHP examples straight from the docs.
We migrated from a brittle aggregator to sms2connect in a weekend. Webhooks match our event bus and OTP latency dropped—our auth graphs look healthier.
Frequently Asked Questions
Technical questions about our SMS API
Ship SMS features your users trust
Get API keys, test in sandbox, and go live with sms2connect.