Search one MS/MS spectrum against all public GNPS/MassIVE data (or the GNPS libraries) with fastMASST. Give a USI, pick a library, and get the matching public spectra and which datasets they came from — the search runs on the GNPS server, the rest in your browser.
A plain MASST tells you which datasets your spectrum appears in. The domain MASSTs go further — they intersect those hits with curated reference metadata to tell you what kind of sample the molecule was seen in (the microbe, food, plant, tissue, product, or microbiome behind each match) and place the results on an interactive taxonomy / ontology tree.
| Dataset | Matches |
|---|
| Cosine | Peaks | Δ mass | Dataset | Compound | Spectrum |
|---|
If you use MASST or a domain MASST, please cite the original MASST paper and the relevant domain tool:
The domain MASSTs and their reference metadata are developed by the Dorrestein Lab (UC San Diego) and collaborators, built on the GNPS2 / fast MASST search infrastructure from the Wang Lab (UC Riverside). Reference-tree and data code: robinschmid/microbe_masst.
Contributors include Robin Schmid, Simone Zuffa, Wilhan Nunes, Shipei Xing, Yasin El Abiead, Sydney Thomas, Helena Mannochio-Russo, Mingxun Wang, and Pieter C. Dorrestein (PI).
fastMASST matches fragmentation patterns; a hit means a public spectrum looks
similar to your query, not a confirmed identification — verify with the
mirror plot and metadata. “All public data” searches GNPS/MassIVE repository
spectra; annotations (compound names) come only from library hits. Search runs
on api.fasst.gnps2.org; this page needs cross-origin access enabled
there for apps.gnps2.org, else the search fails with a network error.