> For the complete documentation index, see [llms.txt](https://docs.magecomp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.magecomp.com/magento-2-out-of-stock-notification-extension/sms-gateway-apis.md).

# SMS Gateway API's

The extension comes with 3 different build in API Gateways to send in stock notification.

<figure><img src="https://807210804-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8wMgNeFnYjVGQmgdxMv4%2Fuploads%2FiWh5NtToPMRfHuox0HYk%2Fimage.png?alt=media&amp;token=698d6956-5e99-4e82-a5d5-cb9df88b17c2" alt=""><figcaption></figcaption></figure>

* **Bulk SMS:** By making selections of “Bulk SMS” as Gateway you need to enter following details to send in stock notification SMS.

<figure><img src="https://807210804-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8wMgNeFnYjVGQmgdxMv4%2Fuploads%2FLsc4jN0IbxeqH85qdcON%2Fimage.png?alt=media&amp;token=136c1bb1-4e36-4a78-818e-001251c92512" alt=""><figcaption></figcaption></figure>

* **MSG91:** By making selections of “MSG91”as Gateway you need to enter following details to send in stock notification SMS.

<figure><img src="https://807210804-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8wMgNeFnYjVGQmgdxMv4%2Fuploads%2FV8bxPWWRcoK2ZdnUvNO0%2Fimage.png?alt=media&amp;token=a4be57fe-db56-403b-8609-6084fc0b3213" alt=""><figcaption></figcaption></figure>

* **Twilio:** By making selections of “Twilio” as Gateway you need to enter following details to send in stock notification SMS.

<figure><img src="https://807210804-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8wMgNeFnYjVGQmgdxMv4%2Fuploads%2FCa4yceSH98DFJhqn5JGB%2Fimage.png?alt=media&amp;token=a13565ec-bddf-41cb-b119-94c2fdd63ad1" alt=""><figcaption></figcaption></figure>