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Checkout.com Invalid Callback URL

The callback URL provided is not valid.

Understanding Checkout.com

Checkout.com is a leading payment gateway provider that offers a comprehensive suite of payment solutions for businesses. It facilitates online transactions by providing secure and efficient payment processing services. The platform is designed to handle various payment methods, currencies, and regions, making it a versatile choice for global businesses.

Identifying the Symptom: Invalid Callback URL

When integrating Checkout.com into your application, you might encounter an error message stating 'Invalid Callback URL.' This error typically appears during the payment processing or webhook configuration phase, indicating that the callback URL provided is not recognized as valid by the system.

What is a Callback URL?

A callback URL is an endpoint on your server that Checkout.com uses to send notifications about the status of a transaction. It is crucial for ensuring that your application receives real-time updates about payment events.

Exploring the Issue: Invalid Callback URL

The 'Invalid Callback URL' error occurs when the URL provided does not meet the expected format or is inaccessible. This can happen due to several reasons, such as incorrect URL syntax, server misconfiguration, or network issues.

Common Causes of Invalid Callback URL

  • Incorrect URL format: Missing protocol (http/https) or incorrect domain.
  • Server not reachable: The server hosting the callback URL is down or not publicly accessible.
  • Firewall restrictions: Network settings blocking incoming requests from Checkout.com.

Steps to Fix the Invalid Callback URL Issue

To resolve the 'Invalid Callback URL' error, follow these actionable steps:

1. Verify the URL Format

Ensure that your callback URL is correctly formatted. It should include the protocol (http or https) and be a valid, reachable domain. For example:

https://yourdomain.com/callback-endpoint

2. Check Server Accessibility

Make sure that the server hosting the callback URL is up and running. You can use tools like Down For Everyone Or Just Me to verify if your server is accessible from the internet.

3. Review Firewall and Network Settings

Ensure that your firewall or network settings allow incoming requests from Checkout.com's IP addresses. You can find a list of their IP addresses in the Checkout.com documentation.

4. Test the Callback URL

Use tools like RequestBin to test if your callback URL is receiving requests correctly. This can help you identify if the issue lies with the URL or the server configuration.

Conclusion

By following these steps, you should be able to resolve the 'Invalid Callback URL' error and ensure smooth integration with Checkout.com. Always double-check your configurations and keep your server accessible to avoid similar issues in the future.

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