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Loupe: free citation lookup

legal.loupe/citation-lookup · v1.0.0

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

Connect Remote server

Terminal
claude mcp add --transport http citation-lookup https://loupe.legal/mcp-public
~/.cursor/mcp.json
{
  "mcpServers": {
    "citation-lookup": {
      "url": "https://loupe.legal/mcp-public"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "citation-lookup": {
      "type": "http",
      "url": "https://loupe.legal/mcp-public"
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://loupe.legal/mcp-public

Tools 2 found in our last check

  • check_citation

    Check 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 err…

  • search_cases

    Search 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.

Details

Endpointhttps://loupe.legal/mcp-public (Streamable HTTP)
First published27 Sep 2026
Last updated27 Sep 2026
Registry namelegal.loupe/citation-lookup

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