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.
Connect it
Settings → Connectors → Add custom connector
URL: https://loupe.legal/mcp-publicSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://loupe.legal/mcp-public{
"mcpServers": {
"citation-lookup": {
"url": "https://loupe.legal/mcp-public"
}
}
}claude mcp add --transport http citation-lookup https://loupe.legal/mcp-public{
"servers": {
"citation-lookup": {
"type": "http",
"url": "https://loupe.legal/mcp-public"
}
}
}2 tools, verified live
check_citationread-onlyCheck 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.
search_casesread-onlySearch 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.
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