However, I'm now negotiating with GFCO to get continually up-to-date information. I'm also working with another major GF certification and will soon be adding their products too.
What would their motivation be to work with you rather than just enhance their own website?
Edit:
e.g. in the UK, sui generis rights apply to a database [2], such that if creation of a database required
"substantial investment in obtaining, verifying or presenting the contents of the database"
then someone else cannot copy it and re-publish in another form. This is very different from US law, which requires some "creative originality" to be involved.
[1] https://en.wikipedia.org/wiki/Feist_Publications,_Inc.,_v._R....
[2] https://en.wikipedia.org/wiki/Sui_generis_database_right
GFCO seem to require less than 10 PPM, and no barley. Is that consistent with other orgs?
GFCO certifies individual products with testing.
GFCP certifies facilities with required systems and processes. These folks basically do the certification at a higher place in the chain and is where the industry is headed.
Barley, rye, wheat and other grains each have their own protein. For those they are hordein, secalin, and gliadin, and they are all considered gluten.
Is the information regarding where to purchase the products added manually?
Purchase links are added a few different ways. We're an affiliate for Nuts.com, so we have access to their entire product list. It takes a bit of manual work to match up the data, but I'll be able to automate it as soon as it makes sense to do so.