{"code":"SUCCESS","message":"Success check user","results":{"is_on_whatsapp":true}}
curl --location --request GET 'https://zylalabs.com/api/12956/whatsapp+fast+lookup+api/25864/user+check' --header 'Authorization: Bearer YOUR_API_KEY'
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 Fast Lookup API simply include your bearer token in the Authorization header.
| Header | Description |
|---|---|
Authorization
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Required
Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.
|
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The WhatsApp Phone Number Verification API allows you to instantly check whether a phone number is registered with WhatsApp. With a simple API request, you can validate a contact’s availability before initiating any customer interaction, which reduces failed message delivery attempts and improves communication efficiency.
This API is designed for rapid number validation and returns a clear, structured response indicating whether a specific phone number has an active WhatsApp account.
The API returns various data types: User Info provides basic details like name and device; User Avatar returns a URL for the profile picture; User Check indicates if a number is registered; User Business Profile offers detailed business information; Phone Codes lists country names, flags, and dial codes; Status confirms server availability.
Key fields include "is_on_whatsapp" in User Check, which indicates registration status; "name" and "JID" in User Info; "avatar_url" in User Avatar; and business details like "business_name" in User Business Profile. Each endpoint's response structure varies based on the data requested.
Response data is structured in JSON format. For example, User Check returns a "code," "message," and "results" object containing specific details like registration status. Each endpoint has a consistent structure, making it easy to parse and utilize the data effectively.
User Info provides personal details, User Avatar gives the profile picture URL, User Check confirms WhatsApp registration, User Business Profile offers business account details, Phone Codes lists country information, and Status checks server health. Each endpoint serves distinct use cases.
Users can customize requests by specifying the phone number for User Info, User Avatar, User Check, and User Business Profile endpoints. For Phone Codes, no parameters are needed, while Status requires no input. Ensure the phone number is in the correct format for accurate results.
The data is sourced directly from WhatsApp's infrastructure, ensuring high accuracy and reliability. The API leverages WhatsApp's registration and user profile databases to provide real-time information about phone numbers and accounts.
Typical use cases include validating customer phone numbers before messaging, retrieving user profiles for personalized communication, and checking business account details for customer service interactions. This enhances engagement and reduces failed message attempts.
If results are partial or empty, check the phone number format and ensure it is registered with WhatsApp. For User Check, an "is_on_whatsapp" value of false indicates no registration. Implement error handling to manage such scenarios gracefully in your application.
To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
The free trial lasts for 7 days and allows you to make up to 50 API requests.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
You can monitor your API usage through the response headers included with every request:
x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.
Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.
Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.
Please have a look at our Refund Policy: https://zylalabs.com/terms#refund