Looking pretty good so far!
You’ll want to use the barcode scanner’s “value” block in your Web API Get call. Do this by assigning a variable to the green “value” block. Then, join the new variable to the URL text.
According to this page, the format for the barcode url is:
https://world.openfoodfacts.org/api/v0/product/[barcode].json
So you can join “https://world.openfoodfacts.org/api/v0/product/” with the new variable and then with “.json”
Just out of curiosity, I tried this with a product I have: https://world.openfoodfacts.org/api/v0/product/856904000376.json.
When I put the results in the JSON formatter page, I get this:
If, for example, you wanted to get the “nutrition_data_per” field (value of 100g), you would take the “nutrition_data_per” property of the “product” property of the object. That’s working my way back up from that field in the formatted list of properties.