WhatsApp Data Capture API

Checks whether a user exists in a database and returns true or false.
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This WhatsApp Check API is a tool designed for users who need to validate the existence or availability of a number within the WhatsApp network. It works simply and efficiently: the service receives a phone number in international format as a parameter and returns a Boolean response—true or false—depending on whether or not the number is registered on the messaging platform.

The main advantage of this API lies in its simplicity of integration. It can be easily connected to CRM systems, marketing platforms, web applications, or conversational bots. This allows users to avoid errors when sending messages to non-existent numbers, optimize resources, and maintain more accurate and up-to-date databases.

In short, this API provides a practical, fast, and secure solution for validating WhatsApp numbers, helping developers and organizations improve the efficiency of their digital communication operations with a simple Boolean result.

API Documentation

Endpoints


Receives a phone number, verifies its registration in WhatsApp, and returns a Boolean response indicating whether or not it exists.



                                                                            
GET https://www.zylalabs.com/api/11206/whatsapp+data+capture+api/21179/whatsapp+verification
                                                                            
                                                                        

WhatsApp Verification - Endpoint Features

Object Description
phone [Required] Enter a phone number
Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                                                                                                                                        {"exists":true,"meta":{"cached_at":"2026-01-13T17:35:35.079362Z","API":"-","source":"cache","timestamp":"2026-01-13T17:35:35.079362Z"}}
                                                                                                                                                                                                                    
                                                                                                    

WhatsApp Verification - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11206/whatsapp+data+capture+api/21179/whatsapp+verification?phone=+212612542343' --header 'Authorization: Bearer YOUR_API_KEY' 


    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the WhatsApp Data Capture API simply include your bearer token in the Authorization header.
Headers
Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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WhatsApp Data Capture API FAQs

The WhatsApp Check API returns a Boolean value indicating whether a provided phone number is registered on WhatsApp. The response includes additional fields such as the number itself, logs, and a timestamp.

The key fields in the response data include "exists" (Boolean), "number" (the verified phone number), "logs" (indicating the number of checks performed), and "timestamp" (the time of the response).

The response data is structured in JSON format. It contains a "data" array with objects that include fields like "exists," "number," and "logs," along with metadata such as "API" version and "timestamp."

The primary parameter for the WhatsApp Check API is the phone number, which must be provided in international format (e.g., +1234567890). No additional parameters are required for the basic verification.

Typical use cases include validating phone numbers for marketing campaigns, ensuring accurate contact lists in CRM systems, and preventing errors in automated messaging systems by confirming number registration on WhatsApp.

Data accuracy is maintained through regular updates and checks against WhatsApp's registration database. The API ensures that the verification process reflects the current status of the phone number in the WhatsApp network.

Users can utilize the returned data by checking the "exists" field to determine if a number is valid for messaging. This helps in optimizing communication strategies and reducing the risk of sending messages to non-existent numbers.

Standard data patterns include a clear Boolean response for the "exists" field, with the "number" field reflecting the input number. Users can expect consistent formatting in the JSON response, facilitating easy integration into applications.

The WhatsApp Check API provides information on whether a phone number is registered on WhatsApp, indicated by the "exists" Boolean field. It also returns the verified phone number, the number of checks performed in "logs," and a timestamp of the response.

Yes, the WhatsApp Check API supports phone numbers from all regions, provided they are formatted in international format (e.g., +1234567890). This ensures global coverage for number verification.

Users can customize their requests by specifying the phone number they wish to verify in international format. Currently, no additional parameters are available for customization.

The "logs" field indicates the number of verification checks performed for the specified phone number. This can help users track how often a number has been validated.

If the "exists" field is false, it means the provided phone number is not registered on WhatsApp. Users should consider this when planning communication strategies to avoid sending messages to non-existent numbers.

The "timestamp" field indicates the exact time when the verification response was generated. This helps users understand the recency of the data and can be useful for logging and auditing purposes.

An empty response is not typical for the WhatsApp Check API. Users should ensure the phone number is correctly formatted and retry the request. If issues persist, they may need to check their integration or contact support.

The API ensures quality by regularly checking against WhatsApp's registration database, which helps maintain accurate and up-to-date verification results for the provided phone numbers.

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