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Loupe: free citation lookup

Check if a US legal citation exists, names its case and has a valid pin cite; or find a case. Free.

First seen 2 Oct 2026. Evidence as of 2 Oct 2026.

2
Tools
From an anonymous probe
1
Source listings
Each with its own history
0
Recorded changes
Since first seen

Tools

ToolDescriptionBehaviour
check_citationCheck one US legal citation, or a sentence holding a few: whether it exists in the sources Loupe checks, which case it is, and whether a pin cite falls inside the opinion. Give it exactly as written, with the case name and year if the document has them, because the commonest error is a real citation attached to the wrong case.Read-only
search_casesSearch the case names in Loupe's index, or look up the case a citation names. Give the parties' names, and the year if known. A case missing from the results may still exist.Read-only

Change history

No changes since the first observation. The first snapshot is the baseline.

Source listings
SourceListingFirst seenLast seenVersions
Official MCP Registrylegal.loupe/citation-lookup2 Oct 20262 Oct 20261