Have you encountered a CORS policy error while trying to call an external API with Webflow Logic? It works fine in the designer, but raises an error when deployed. Any suggestions or solutions for this issue?

Yes, encountering a CORS (Cross-Origin Resource Sharing) policy error is a common issue when trying to call an external API from Webflow Logic. This error occurs when the API you are trying to access is hosted on a different domain than your Webflow site, and the browser blocks the request due to security reasons.

To resolve this issue, you have a few options:

1. Enable CORS on the API: If you have access to the API that you are trying to call, you can configure it to allow cross-origin requests from your Webflow site. This can typically be done by adding the appropriate CORS headers to the API server's response. Consult the API documentation or contact the API provider for guidance on how to enable CORS.

2. Proxy the API request through a server: If the API does not have CORS enabled or you don't have control over it, you can set up a server-side proxy to make the API request on behalf of your Webflow site. This involves creating a server-side script (using a language like Node.js, PHP, Python, etc.) that acts as an intermediary between your Webflow site and the API. Your Webflow Logic can then make a request to the server-side script, which in turn makes the request to the API. Since the server-side script is running on the same domain as your Webflow site, it doesn't face the CORS restrictions. Once the response is received by the server-side script, it can be forwarded back to your Webflow Logic.

3. Utilize a third-party service: There are also third-party services available that act as proxies and help you bypass CORS restrictions. These services essentially work as a middleman between your Webflow site and the API, allowing the requests to pass through without triggering the CORS error. One popular option is `cors-anywhere`, which you can find on GitHub. It's a reverse proxy that you can deploy and use to proxy your API requests through.

4. Check if JSONP is supported by the API: JSONP (JSON with Padding) is an alternative method to bypass CORS restrictions. It involves modifying the API request to expect a callback function, instead of the standard JSON response. However, not all APIs support JSONP, so you would need to check the API documentation or contact the API provider to see if this is an option.

Before implementing any of these solutions, it's important to consider the security implications and potential impact on performance. Be sure to carefully review the documentation and guidelines provided by the API provider, and design your solution accordingly.