Developer API

SMS API in Sao Tome and Principe

Add SMS to your application in Sao Tome and Principe in minutes. The eSMS Africa SMS API delivers to CST & Unitel over direct routes, with delivery webhooks, OTP, sender IDs and a free sandbox to test before you go live.

Get API keys free Read the API docs

Direct routes to 2 networks Delivery reports STN 1.9413 per SMS

Networks in Sao Tome and Principe

CSTUnitel

Country code

+239

الحالة

Production

Why eSMS Africa

SMS API in Sao Tome and Principe, done properly

REST API + SMPP

Send with a simple HTTPS request or bind over SMPP for high throughput. Either way your Sao Tome and Principe traffic runs on the same direct routes to CST, Unitel.

Delivery webhooks (DLR)

Get a real-time callback for every message status - sent, delivered, failed - so your app always knows what happened to each SMS in Sao Tome and Principe.

Sandbox + SDKs

Test free in the sandbox, then go live with official Node, Python, PHP and Go SDKs. Example numbers for Sao Tome and Principe use the +239 country code.

Sender IDs & OTP

Step by step

How to send an SMS to Sao Tome and Principe with the API

1
Get your API key. Create an account and copy your API key from the dashboard.
2
Format the number. Use international format for Sao Tome and Principe numbers - they start with +239 (e.g. 2399812345).
3
Call the send endpoint. POST to https://api.esmsafrica.io/v1/sms/send with to, from and message.
4
Receive delivery reports. Set a webhook URL and eSMS Africa calls it with each message status in real time.
5
Go live. Test in the sandbox with a test key, then switch to your live key.

Integrate in minutes

Send your first SMS to Sao Tome and Principe

curl -X POST https://api.esmsafrica.io/v1/sms/send \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "2399812345",
    "from": "MyBrand",
    "message": "Your message"
  }'

Full REST reference, SMPP details and SDKs for Node, Python, PHP and Go in the API documentation.

Local pricing

SMS API pricing in Sao Tome and Principe

أساسي

STN 2.2663

per SMS

الأعمال

STN 2.1049

per SMS

Enterprise

STN 1.9413

per SMS

Prices reflect live rates for Sao Tome and Principe. See the full pricing page or contact sales for volume rates.

FAQ

SMS API in Sao Tome and Principe: common questions

How do I send an SMS to Sao Tome and Principe from my app?

POST to the eSMS Africa /sms/send endpoint with the recipient in international format (+239...) and your message. See the code samples on this page for curl, Node, Python and PHP.

Do you support delivery reports over the API?

Yes. Set a webhook URL and eSMS Africa calls it with the delivery status of every message to Sao Tome and Principe in real time.

REST or SMPP for Sao Tome and Principe?

Use REST for most applications; use SMPP when you need very high, sustained throughput. Both reach CST & Unitel on direct routes.

Is there a sandbox?

Yes - a free sandbox and test API keys let you integrate and test SMS to Sao Tome and Principe without spending credit.

Which SDKs are available?

Official SDKs for Node.js, Python, PHP and Go, plus a documented REST API you can call from any language.