Callmebot
Simple API to send WhatsApp, Facebook Messenger, and Telegram messages and voice calls
| What is it | Simple API to send WhatsApp, Facebook Messenger, and Telegram messages and voice calls |
|---|---|
| Pricing | Unknown |
| Platform | Web Application |
| API | Yes |
| Works with | IFTTT |
| Best for | sending notifications from IoT devices or alarms, triggering voice calls when servers go down |
| Domain registered | 2019 |
Data updated Aug. 1, 2026
What does Callmebot do?
Callmebot is a straightforward API service that lets you send text messages and trigger voice calls across WhatsApp, Facebook Messenger, and Telegram. You don't need a smartphone or a dedicated app — just make an HTTP GET request from any script, automation tool, or IoT device. The service also offers a way to look up Telegram IDs from phone numbers or aliases. It started as a personal home automation project and grew into a public tool.
Using Callmebot is simple. Each messaging platform has its own endpoint. For example, to send a WhatsApp message, you send a GET request with your target phone number and the message text. Voice calls work similarly — you set up a webhook that triggers a call when an event happens (like an alarm or server downtime). The service integrates with popular home automation platforms like Home Assistant, OpenHAB, ioBroker, and IFTTT. There are also ready-to-use guides on the site.
This tool is best for developers, tinkerers, and system administrators who want a quick, no-fuss way to add messaging or voice notifications to their projects. If you're monitoring servers, running a smart home, or just need to get an alert when something breaks, Callmebot does the job without any complex setup. It's a hobby project, so donations help keep the servers running, but the core APIs are free to use.
Key features
What makes it stand outWho is Callmebot for?
Who benefits most from this toolTrust & presence
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