About search.peptides

search.peptides is a free, independent search over every research-peptide vendor we can find: 19,182 listings from 1,982 vendors, ranked by price per mg, with independent lab results and each vendor’s contact details.

Who it is for

Researchers, labs and buyers comparing research-peptide vendors before they order: who is cheapest per milligram, who has passed independent testing, how they take payment, where they ship from and how to reach them.

Who runs it

It is built and run by Profullstack, Inc. as part of the Profullstack network. It sells nothing, takes no commission and uses no affiliate links; the only paid placement is a clearly labelled sponsored pin. The code is open source at github.com/moshcoder/search.peptides.

How vendors get listed

Vendors come in automatically from the public peptide price register and Finnrick’s vendor list, re-read every hour and every six hours. A shop that is missing, or listed wrongly, can open an issue; a listed shop can also sponsor its place.

How it works

How we score and price explains the vendor score, what “passed” means and how price per mg is worked out. Every search on the site is also a keyless API, CLI and MCP server.

Contact

Corrections, vendor disputes and press: GitHub issues. Security reports: security.txt.