An SMS API lets your software send text messages, such as one-time passcodes and alerts, with a single HTTP request: with BroadNet, your code calls POST /sms/sendSms with a Bearer token, or binds over SMPP for high-volume pipelines. Documented in an OpenAPI 3.1 spec. An official TypeScript SDK. Delivery reports by webhook. Test access on request.
One TLS handshake, five engineered hops, two webhooks. Every stage has its own latency budget — and every budget is on the SLA, not the marketing page.
POST /sms/sendSms over TLS, Bearer-token auth, JSON body: senderId, destinationNumber, message, messageType.
Token check, schema validation and route lookup — the message ID comes straight back in the response.
Per-route quality score selects fastest legal SMPP bind. Multi-region active-active failover in <800ms.
Direct SMPP bind to the destination MNO. submit_sm sent; sequence number tracked for DLR correlation.
deliver_sm captured and POSTed to your webhook URL as a delivery report, keyed to the message ID.
POST /sms/sendSms over TLS, Bearer-token auth, JSON body: senderId, destinationNumber, message, messageType.
Token check, schema validation and route lookup — the message ID comes straight back in the response.
Per-route quality score selects fastest legal SMPP bind. Multi-region active-active failover in <800ms.
Direct SMPP bind to the destination MNO. submit_sm sent; sequence number tracked for DLR correlation.
deliver_sm captured and POSTed to your webhook URL as a delivery report, keyed to the message ID.
Fill in a request, hit send, and watch a simulated response and delivery flow — right here, no signup.
Authorization: Bearer $BROADNET_TOKENcurl -X POST https://api.broadnet.me/sms/sendSms \
-H "Authorization: Bearer $BROADNET_TOKEN" \
-H "Content-Type: application/json" \
-d '{
"senderId": "BroadNet",
"destinationNumber": "447700900123",
"message": "Your verification code is 482913",
"messageType": "TEXT"
}'Fill in the request and hit Send test request to see an example response.
Runs entirely in your browser. No request leaves this page and no SMS is sent.
Every tab sends the same request: POST /sms/sendSms with a Bearer token and a JSON body of senderId, destinationNumber, message and messageType. The response body is the message ID.
BroadNet has one official SDK, for TypeScript and Node.js. The Node.js, Python, PHP, Java, C#, Go and Ruby tabs call the REST API directly with ordinary HTTP libraries, with no BroadNet package to install.
Full API referencecurl -X POST https://api.broadnet.me/sms/sendSms \ -H "Authorization: Bearer $BROADNET_TOKEN" \ -H "Content-Type: application/json" \ -d '{ "senderId": "BroadNet", "destinationNumber": "447700900123", "message": "Your verification code is 482913", "messageType": "TEXT" }' # 200 OK → response body is the message ID, e.g. 2603121407537573731Most teams ship on REST and never look back. High-volume carriers, aggregators, and legacy stacks bind to SMPP 3.4. Same routes, same SLA, same dashboard — choose the interface that matches the job.
Every accepted send returns a message ID. Retry on network errors and 5xx with backoff, and reconcile against delivery reports by message ID instead of blind re-sends — background workers can crash and recover cleanly.
Delivery receipts are pushed to your webhook URL and tied to the message ID, for REST and SMPP traffic alike — no polling loop to write.
Up to 32 parallel SMPP binds per account. HTTP/2 multiplexing on REST. No fixed per-account rate limits — throughput is sized to your traffic, never capped per connection.
Multi-region active-active. If a route degrades mid-campaign we re-bind in under 800ms and re-queue in-flight messages. No SMPP reconnect logic to write yourself.
No fixed per-account rate limits — throughput is sized to your traffic, up to 30,000 SMS/s per node. No silent throttling, no shadow-banned numbers — you always know where you stand.
Machine-readable, served at /developers/openapi.yaml. The official TypeScript SDK is generated from it; generate a client in any other language, or import it into Postman or Insomnia.
These targets are contractual on enterprise plans, not aspirational copy. Miss them and the credits below are automatic on the next invoice.
The official TypeScript SDK is generated from the public OpenAPI 3.1 spec, so the two never drift. Generate a client in any other language or import the spec into Postman. The docs run on the same staging environment your code does.
Request test access and we reply within one business day with your test credentials; your first test message reaches your own verified number about five minutes after that. Production traffic typically starts within 5–15 business days, gated by sender ID registration with the regulator — not by anything on our side.
Retry only on network errors and 5xx, with exponential backoff, and keep the message ID the API returns for every accepted send. Reconcile against delivery reports by message ID before re-sending, rather than blind retries, and top up credits before a low balance blocks traffic.
Real. The OpenAPI 3.1 spec at /developers/openapi.yaml (JSON at /developers/openapi.json) documents every channel — SMS, WhatsApp, RCS, Telegram, Push, Email, Messenger and Instagram. The official TypeScript SDK (@broadnet/cpaas-sdk) is generated from it, and you can generate your own client in any other language without asking us.
There is no API fee — you pay per message, per country, per route. UAE transactional starts at $0.0123/MT, KSA at $0.016 and Egypt at $0.028. SMPP binds are included on enterprise tier; on standard tier each dedicated bind is $250/month. Test access is on request, and test traffic is capped at 1,000 messages a day.
We retry with exponential backoff for 24 hours: 30s, 2m, 10m, 30m, 2h, 8h, 24h. Each retry includes an X-Webhook-Attempt header. After 24 hours the event is parked in the dead-letter queue, queryable and replayable from the dashboard with one click. Standard tier keeps DLQ for 7 days; enterprise for 90.
Yes — they share routing, DLRs, billing, and dashboards. Most customers use REST for transactional and SMPP for high-volume marketing on the same account, and delivery reports from both paths land in the same reports and webhooks.
Named technical account manager, 99.99% API uptime SLA with service credits against the monthly fee (10% below 99.99%, 25% below 99.0%, 50% below 95.0%), 24/7 NOC pager with <15-min sev-1 ack, dedicated SMPP binds, quarterly architecture reviews, and a shared Slack channel with the engineering team.
broadnet.me/status shows component status and any posted incidents. It is not yet fed by live monitoring, so its 90-day history is illustrative, not measured; the contractual figure is the 99.99% uptime SLA.
Question not here? Ask our engineering team
The SMS API is one entry point into the broader A2P SMS platform. The same direct operator routes also power bulk SMS campaigns, OTP and multi-channel verification, and the WhatsApp Business API.
Weighing providers? Read our Best SMS API in 2026 buyer's guide.
No grey routes: a direct operator bind wherever one is commercially available, otherwise a labelled partner-managed route. One API to every channel, on a network built since 2003.
One access token, an official TypeScript SDK, and a quickstart that fits on a single screen. The fastest path from signup to your first delivery receipt.
Resources
SMS API datasheet
Go deeper on the concepts behind this product.