Please read through these instructions for integrating fullres with your Substack publication: https://substack.fullres-demos.com/p/how-to-log-custom-metadata-for-post

1. Setup custom domain on Substack. You will need to be using a custom domain for your Substack publication (e.g. my-special-site.com). You can do this within Substack by going to Settings > Domain.

2. Setup a Cloudflare Worker. You also need to be using Cloudflare for your domains DNS, as this technique requires a DNS proxy. Sample script is included here `cloudflare-worker-script.js`

If you need a hand with anything please reach out to us: support@fullres.com