I came across a different website today and figured I'd pass it along. It's https://aesis.health/. This site hosts a collection of common peptides, covering CAS number, molecular weight, half life, pharmacokinetics graphs, target receptors, plus links to pubchem clinical studies. Seems quite useful, and it's free with no login needed. If you create an account, you can track your research in more detail (that's free too); I haven't tried that part yet, so I can't comment on it, but it looks like a solid resource. I'm not the person who made it and I don't know who did, but if you'd like to send feedback, you can do so on Reddit.
https://www.reddit.com/r/Peptidesource/s/MEvnlsy3xt
https://www.reddit.com/r/Peptidesource/s/MEvnlsy3xt