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Contact → Check Exists
AI-generatedOverview
This node integrates with the Wappfy API to interact with WhatsApp. Specifically, the Contact - Check Exists operation allows you to verify if a given phone number is registered on WhatsApp. This can be useful in scenarios such as validating user contact information before sending messages or managing contact lists.
Practical example:
Before sending a promotional message to a phone number, you can use this operation to check if the number exists on WhatsApp, ensuring your message reaches an active WhatsApp user.
Properties
| Name | Meaning |
|---|---|
| Phone Number | The phone number to check for existence on WhatsApp |
Output
The output JSON contains the response from the Wappfy API indicating whether the specified phone number exists on WhatsApp. The exact structure depends on the API response but typically includes fields confirming existence status and possibly additional metadata about the contact.
No binary data output is produced by this operation.
Dependencies
Requires an active Wappfy API credential with:
- Base URL of the Wappfy API instance
- Instance name identifier
- API key for authentication
The node makes HTTP GET requests to the Wappfy API endpoint
/api/contacts/check-existswith query parameters including the phone number and session (instance name).Ensure the Wappfy API credentials are properly configured in n8n before using this node.
Troubleshooting
Common issues:
- Invalid or missing API credentials will cause authentication failures.
- Incorrect phone number format may lead to unexpected results or errors.
- Network connectivity issues can prevent successful API calls.
Error messages:
- Authentication errors usually indicate invalid API key or instance configuration.
- "Contact not found" or similar messages mean the phone number does not exist on WhatsApp.
- HTTP request failures should be checked for correct base URL and internet access.
Resolution tips:
- Verify API credentials and instance name in n8n settings.
- Confirm phone number format matches expected international format without extra characters.
- Test connectivity to the Wappfy API endpoint outside n8n to isolate network issues.
Links and References
- Wappfy API Documentation (Assumed official docs for reference)
- WhatsApp Business API concepts for contact validation (general knowledge)