Quickstart
Get an API key, send your first SMS and check its delivery status — all in about five minutes. Start now →
Build with the 23 Telecom CPaaS API
Send SMS to 230+ countries, track delivery in real time, and automate your messaging — with a clean REST API, webhooks, and examples in 8 languages.
Welcome to the 23 Telecom SMS API.
This demo replays real request/response pairs from the docs. Try:
Want the real thing? Open the API playground or grab the 5-minute quickstart.
Start integrating
Section titled “Start integrating”Send SMS
One endpoint, up to 100 recipients per request, automatic GSM-7/UCS-2 encoding and per-recipient results. POST /sms/send →
Webhooks & events
Real-time delivery reports, clicks and conversions pushed to your server, with HMAC-signed payloads. Set up webhooks →
Statistics & reporting
Aggregate, daily and per-country statistics plus full message history with CSV export. Explore statistics →
Tools for every workflow
Section titled “Tools for every workflow” API playground Try every endpoint in the browser — interactive reference generated from our OpenAPI spec.
Postman collection Download the ready-made collection, set two variables and start sending.
OpenAPI specification Machine-readable OpenAPI 3.1 spec — generate clients, mocks and tests.
Use docs with AI Copy the docs into ChatGPT or Claude in one click — or point your coding agent at llms.txt.
Why developers choose 23 Telecom
Section titled “Why developers choose 23 Telecom”- Simple authentication — one
X-API-Keyheader, with optional HMAC request signing for high-security environments. - Honest delivery data — real DLR statuses from carriers (
DELIVRD,UNDELIV,REJECTD,EXPIRED), not optimistic guesses. - Atomic batch sends — a multi-recipient request either fully queues or fully fails. No partial-success surprises.
- Built to grow — SMS today; additional messaging channels (Viber and more) are coming to the same API and docs.