Inout
Simplest WhatsApp API for personal use — send and receive messages via REST API with no registration required
| What is it | Simplest WhatsApp API for personal use — send and receive messages via REST API with no registration required |
|---|---|
| Pricing | Unknown |
| Platform | API |
| API | Yes |
| Works with | IFTTT |
| Best for | sending automated WhatsApp notifications, receiving messages for customer support |
| Domain registered | 2024 |
Data updated Aug. 1, 2026
What does Inout do?
Inout is a straightforward WhatsApp API that lets you send and receive messages using Meta's official WhatsApp API. It's built for personal use and small-scale projects, with a focus on simplicity. You don't need to create an account or register — just generate an API key and start sending messages. Inout also offers a phone call API for making GSM calls, and free OTP/2FA verification over WhatsApp, which can replace costly SMS verification.
The service works through a REST API, and you can integrate it with automation platforms like Make, IFTTT, and Google AppSheet. Receiving messages is free, and sending messages or making calls is pay-per-use. There's no monthly subscription or hidden fees. Inout also provides a free WhatsApp channel for receiving messages, and you can set up two-factor authentication with just a few lines of code. The tool is designed to be minimal — one step to start, no bloat.
Developers who need a lightweight way to add WhatsApp messaging to their apps will find Inout useful. It's also handy for small business owners who want to send order confirmations or alerts without dealing with complex APIs. Personal users can use it for notifications or 2FA. If you need a no-fuss WhatsApp API that doesn't require registration, Inout is a solid choice.
Key features
What makes it stand outWho is Inout for?
Who benefits most from this toolTrust & presence
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