API Master Documentation

Welcome to the GENSMS programmable infrastructure. Our high-performance API allows enterprises to integrate global messaging into any application with sub-3s delivery and institutional-grade reliability.

Designed for scale and simplicity, our RESTful endpoints connect you to 190+ countries through a single, secure gateway.

Authentication

All GENSMS API requests must be authenticated via an API Key provided as a standard Bearer token in your request headers.

Your keys carry full account permissions—keep them secure and never expose them in client-side applications.

POST

Send Single Message

Reliably broadcast a single SMS message to any mobile destination worldwide.

https://api.gensms.com/v1/send

Parameter	Description
to string Required	Destination number in international E.164 format (e.g. `+14155552671`).
from string Required	Your approved Alpha-numeric Sender ID or virtual number.
text string Required	The message body. We handle concatenation automatically for multi-segment messages.