Send personized message via Zalo

This endpoint is used for sending SMS by batch (1 request for multiple SMS) via Zalo with shared or personized content/properties.

It is ideal to send any kind of massive personalized announcement.

This API does not support sending messages from free zns wallets, free messages will be checked and reconciled later.

HTTP request

POST https://rest.esms.vn/MainService.svc/json/Send_zns_bulk_v4_post_json/

• Content Type: application/json

• Response Type: application/json

curl --location 'https://rest.esms.vn/MainService.svc/json/Send_zns_bulk_v4_post_json/' \
--header 'Content-Type: application/json' \
--data '{
    "ApiKey": "{{ApiKey}}",
    "SecretKey": "{{SecretKey}}",
    "campaignid": "Chiến dịch 1",
    "OAID": "4097311281936189049",
    "TempID": "267247",
    "Sandbox": "0",
    "CallbackUrl": "https://esms.vn/webhook/",
    "Data": [
        {
            "Phone": "0901888484",
            "RequestId": "96accf59-0c41-4bc7-a5c1",
            "Params": [ "Chị A", "Gội đầu", "KH001", "19/03/2025" ]
        },
        {
            "Phone": "0918238965",
            "RequestId": "96accf59-0c41-4bc7-a5c2",
            "Params": [ "Chị B", "Uốn", "KH002", "19/03/2025" ]
        },
        {
            "Phone": "0765418062",
            "RequestId": "96accf59-0c41-4bc7-a5c3",
            "Params": [ "Chị C", "Nhuộm", "KH003", "19/03/2025" ]
        }
    ]
}'

• Request body

Paramter	Type	Required	Description
ApiKey	string		Your API Key.
SecretKey	string		Your Secret Key.
TempID	string		The ID of template for the OA that is registered and provided by eSMS at Zalo to partner. Each template will have a specified structure of body.
Data	Array		An array of objects containing information about each message you want to send. Note: The array has a maximum size of 500 elements.
Data: Phone	string		The phone number of receivers.
Data: RequestId	string		Partner Message ID, used to check whether this ID has been previously received by the esms system. Ex: RequestId=123456.
Data: Params	string		The values that need to pass according to the template variables. Giá trị cần truyền cho các biến trong Template *Note: The values must be placed in the correct order with the registered template. If the parameter is duplicated, just place one.
SendDate	string		Scheduler the message to the receiver. If it's empty, the message will be instantly sent to the receiver. Format: yyyy-mm-dd hh:MM:ss
OAID	string		Zalo OA Id is the Zalo Official Account Id of the organization. It can be obtained by accessing to the Zalo administrator page. Note: Pre-registration is required.
CallbackUrl	string		The webhook URL that will receive the status of message after it processed to the operator. It is used for determine whether the SMS is succcessfully delivered to the receiver or failed. See the sample request at here. More details at here.
SendingMode	string		Sending Modes: 1 Default (Normal Sending): Messages are sent using the standard ZNS delivery mechanism. 3 Exceed Quota Sending: Allows OA to send ZNS tagged messages exceeding the quota limits. Note: Exceed Quota Sending (SendingMode = 3) is only available for whitelisted OAs. Contact the Customer Support team for access.

---

• Response:

100

{
    "CodeResult": "100",
    "Message": "Sucess",
    "TotalSuccess": 2,
    "detail": [
        {
            "CodeResult": "100",
            "Phone": "{Phone}",
            "SMSID": "a037b928-cb7e-4bfc-bdf9-0286318163aa264"
        },
        {
            "CodeResult": "100",
            "Phone": "{Phone}",
            "SMSID": "b83ff06e-8989-4b0d-818e-795b96699e86264"
        }
    ]
}

Valid request.

101

789

• Response body

Parameter	Type	Description
CodeResult	string	Response code
Message	string	The error message if the request is invalid.
TotalSuccess	string	Number of successfully requests.
detail : CodeResult	string	The detail response code
detail : Phone	string	Phone number of receiver
detail : SMSID	string	The message id corresponding to the phone number.

• The detail of error code can refer at Table of error codes .

• Get the sample of code for programing languagues to use in Postman refer at Link of code samples.