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  • Use WhatsApp API with Custom applications using SyncMate
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  • Connect your Custom App with SyncMate

Connect your Custom App with SyncMate

1 min read

To connect your Custom App with SyncMate, you need to follow the easy steps below:


Step 1
First of all, you will need to connect your WhatsApp with SyncMate, follow the Configuration guide.


Step 2

Copy the API key of the custom app.  

  #


Step 3
You will need to make a post request on :

1.) Single Messaging:

https://app.assistro.co/api/v1/wapushplus/single/message

The parameters that are required to make a post request on the above URL:

headers = { 
	     "Authorization": "Bearer {bearer_token}", 
	     "Content-Type": "application/json" 
	  }

The API key, which you copied, will be passed in the authorization field.

Request body = {
    "msgs": [
        {
            "number": 911234567890, //Whatsapp number with country code
            "message": "Hi! How are you?",
            "media": [
                {
                    "media_base64": "BASE64_STRING (without mime_type in the beginning)",
                    "file_name": "YOUR_FILENAME"
                }
            ]
        }
    ]
}

 

 

2.) Bulk Messaging:
https://app.assistro.co/api/v1/wapushplus/bulk/message

 


The parameters that are required to make a post request on the above URL:

 

headers = { 
	     "Authorization": "Bearer {bearer_token}", 
	     "Content-Type": "application/json" 
	  }

The API key, which you copied, will be passed in the authorization field.

Request body =  {
    "msgs": [
        {
            "number": 911234567890, //Whatsapp number with country code
            "message": "Hi! How are you?",
            "media": [
                {
                    "media_base64": "BASE64_STRING (without mime_type in the beginning)",
                    "file_name": "YOUR_FILENAME"
                }
            ]
        },
        {
            "number": 911234567890, //Whatsapp number with country code
            "message": "Hey there!"
        },
        {
            "number": 911234567890, //Whatsapp number with country code
            "message": "Good Morning!"
        }
       
    ]
}

Please check our postman collection for better understanding: Download Postman collection

Updated on July 28, 2025

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