  The three main collaborations operating the current generation of imaging
atmospheric Cherenkov telescopes (IACTs: H.E.S.S., MAGIC, VERITAS) publish
their gamma-ray data in different formats and repositories. Extragalactic
sources are highly variable at very-high energies (VHE, $E>100\,$GeV), and a
unified repository would enable joint analyses of collections of extragalactic
VHE spectra. To this aim, we have developed the Spectral TeV Extragalactic
Catalog, STeVECat, which gathers high-level products of IACT observations from
1992 to 2021. We selected all publications in journals referenced in TeVCat
that presented archival spectra with at least two points. We compiled the
corresponding spectral data and formatted them following the convention adopted
in available public repositories (GammaCat and VTSCat). In addition to spectral
points with associated physical units, we provide meta-data featuring
observation periods, livetime, excess counts over background and significance,
as well as the coordinates, types and redshifts of the sources whenever
available. STeVECat combines observations from 173 journal publications,
compared to 72 in the previous reference compilation of extragalactic gamma-ray
spectra (Biteau \& Williams, 2015). STeVECat is the most extensive set of VHE
extragalactic spectra collected so far, with 403 spectra from 73 sources. The
full catalog can readily be loaded with GammaPy, the Science Analysis Tool
selected by the Cherenkov Telescope Array Observatory. Our compilation efforts
enable population studies of extragalactic gamma-ray sources, studies of the
GeV-TeV connection, and studies of absorption on the extragalactic background
light.
