> For the complete documentation index, see [llms.txt](https://developers.esms.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.esms.vn/en/esms-api.md). # eSMS API - [Send SMS API](https://developers.esms.vn/en/esms-api/send-sms-api.md) - [Send OTP/Customer care message](https://developers.esms.vn/en/esms-api/send-sms-api/send-otp-customer-care-message.md) - [Send adveritising message](https://developers.esms.vn/en/esms-api/send-sms-api/advertising-message.md): API dùng để gửi tin Quảng cáo đến khách hàng. Mỗi request tối thiểu 30 số để được duyệt tin và tối đa 5000 số. - [Send message via Zalo](https://developers.esms.vn/en/esms-api/send-sms-api/send-message-via-zalo.md) - [Send message via Zalo by UID](https://developers.esms.vn/en/esms-api/send-sms-api/send-message-via-zalo-by-uid.md) - [Send message via Viber](https://developers.esms.vn/en/esms-api/send-sms-api/send-message-via-viber.md) - [Send fixed number with cheap price](https://developers.esms.vn/en/esms-api/send-sms-api/send-fixed-number-with-cheap-price.md) - [Send multi-channel message via Zalo and SMS](https://developers.esms.vn/en/esms-api/send-sms-api/send-multi-channel-message-via-zalo-and-sms.md) - [Send Zalo message Consulting in text form](https://developers.esms.vn/en/esms-api/send-sms-api/send-zalo-message-consulting-in-text-form.md) - [Send Zalo message with attached photo](https://developers.esms.vn/en/esms-api/send-sms-api/send-zalo-message-with-attached-photo.md) - [Send Zalo message Consulting button](https://developers.esms.vn/en/esms-api/send-sms-api/send-zalo-message-consulting-button.md) - [Send Zalo Trading message](https://developers.esms.vn/en/esms-api/send-sms-api/send-zalo-trading-message.md) - [Send Zalo messages to request user's information](https://developers.esms.vn/en/esms-api/send-sms-api/send-zalo-messages-to-request-users-information.md) - [Send Journey ZNS message](https://developers.esms.vn/en/esms-api/send-sms-api/tin-zalo-hanh-trinh.md) - [Send auto-generated SMS](https://developers.esms.vn/en/esms-api/send-sms-api/send-auto-generated-sms.md) - [The multichannel auto-generated OTP](https://developers.esms.vn/en/esms-api/send-sms-api/the-multichannel-auto-generated-otp.md) - [Retrive and register functions](https://developers.esms.vn/en/esms-api/retrive-and-register-functions.md): Version: v2\_08\_2022 - [Get balance](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-balance.md) - [Get the message status](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/ham-kiem-tra-trang-thai-tin-nhan-theo-khoang-thoi-gian.md) - [Get SMS by SMSID](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-sms-by-smsid.md) - [Get message details](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-message-details.md) - [Get list registered brandnames](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-list-registered-brandnames.md) - [Get list customer care templates](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-list-customer-care-templates.md) - [Summary your customer care submit](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/summary-your-customer-care-submit.md) - [Summary your advertising submit](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/summary-your-advertising-submit.md) - [Get list OA](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-list-oa.md) - [Get list templates of OA](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-list-templates-of-oa.md) - [Summary Zalo message](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/summary-zalo-message.md) - [Get the daily quota of OA](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-the-daily-quota-of-oa.md) - [Get rating information of Zalo users](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-rating-information-of-zalo-users.md) - [Check the OA quality](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/check-the-oa-quality.md) - [Get list Zalo's followers](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-list-zalos-followers.md) - [Get callback data](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-callback-data.md) - [Get Zalo template details](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-zalo-template-details.md) - [Purchase OA package](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/purchase-oa-package.md) - [Registering the Zalo template](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/ham-dang-ky-template-zalo.md) - [Registering SMS template](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/registering-sms-template.md) - [Get ZNS status information](https://developers.esms.vn/en/esms-api/retrive-and-register-functions/get-zns-status-information.md) - [Other APIs](https://developers.esms.vn/en/esms-api/other-apis.md) - [Send customer care message using GET](https://developers.esms.vn/en/esms-api/other-apis/send-customer-care-message-using-get.md) - [Send customer care message using POST X-Form](https://developers.esms.vn/en/esms-api/other-apis/send-customer-care-message-using-post-x-form.md) - [Send customer care message using POST TEXT](https://developers.esms.vn/en/esms-api/other-apis/send-customer-care-message-using-post-text.md): API dùng để gửi tin Quảng cáo đến khách hàng. Mỗi request tối thiểu 30 số để được duyệt tin và tối đa 5000 số. - [Send fixed number using GET](https://developers.esms.vn/en/esms-api/other-apis/send-fixed-number-using-get.md) - [Send advertising message using POST TEXT](https://developers.esms.vn/en/esms-api/other-apis/send-advertising-message-using-post-text.md) - [Send Zalo message (old version)](https://developers.esms.vn/en/esms-api/other-apis/send-zalo-message-old-version.md) - [Send personized message via Zalo](https://developers.esms.vn/en/esms-api/other-apis/send-personized-message-via-zalo.md) - [Send Zalo message using POST X-FORM](https://developers.esms.vn/en/esms-api/other-apis/send-zalo-message-using-post-x-form.md) - [Send Zalo message full template](https://developers.esms.vn/en/esms-api/other-apis/ham-gui-tin-nhan-zalo-dang-json-full-template.md) - [Send Viber message using GET](https://developers.esms.vn/en/esms-api/other-apis/ham-gui-tin-nhan-viber-dang-get.md): Cho phép bạn gửi tin nhắn đến số điện thoại đang sử sụng Viber - [Check code](https://developers.esms.vn/en/esms-api/other-apis/check-code.md): Hàm cho phép bạn gọi API check code xem đã sử dụng, hết hạn. - [Svoucher Connect](https://developers.esms.vn/en/esms-api/svoucher-connect.md) - [Connect to shortcode service](https://developers.esms.vn/en/esms-api/svoucher-connect/connect-to-shortcode-service.md) - [Voice](https://developers.esms.vn/en/esms-api/voice.md) - [Create voice OTP call](https://developers.esms.vn/en/esms-api/voice/create-voice-otp-call.md) - [Create an auto-call using template](https://developers.esms.vn/en/esms-api/voice/create-an-auto-call-using-template.md): Hàm cho phép bạn gửi tin nhắn thoại đến 1 số điện thoại bởi mẫu cuộc gọi đã được tạo sẵn trên hệ thống. - [Create a call from recording file](https://developers.esms.vn/en/esms-api/voice/create-a-call-from-recording-file.md): Hàm cho phép bạn gửi tin nhắn thoại đến 1 số điện thoại bởi file ghi âm đã tạo. - [Get voice call status](https://developers.esms.vn/en/esms-api/voice/get-voice-call-status.md): Hàm cho phép bạn gửi tin nhắn thoại đến 1 số điện thoại bởi file ghi âm đã tạo. - [Table of error codes](https://developers.esms.vn/en/esms-api/table-of-error-codes.md) - [Test environment ( Sandbox)](https://developers.esms.vn/en/esms-api/moi-truong-test-sandbox.md) - [Callback Url](https://developers.esms.vn/en/esms-api/callback-url.md)