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For over 15 years the Fermi Large Area Telescope (Fermi-LAT) has beenmonitoring the entire high-energy gamma-ray sky, providing the best sampled 0.1-- $>1$ TeV photons to this day. As a result, the Fermi-LAT has been servingthe time-domain and multi-messenger community as the main source of gamma-rayactivity alerts. All of this makes the Fermi-LAT a key instrument towardsunderstanding the underlying physics behind the most extreme objects in theuniverse. However, generating mission-long LAT light curves can be verycomputationally expensive. The Fermi-LAT light curve repository (LCR) tacklesthis issue. The LCR is a public library of gamma-ray light curves for 1525Fermi-LAT sources deemed variable in the 4FGL-DR2 catalog. The repositoryconsists of light curves on timescales of days, weeks, and months, generatedthrough a full-likelihood unbinned analysis of the source and surroundingregion, providing flux and photon index measurements for each time interval.Hosted at NASA's FSSC, the library provides users with access to thiscontinually updated light curve data, further serving as a resource to thetime-domain and multi-messenger communities.

The Fermi-LAT Light Curve Repository: A resource for the time-domain and multi-messenger communities