protogrid

Search / legal.loupe/citation-lookup

Loupe: free citation lookup

R0· no sign-in

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

v1.0.0 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality91strong
Trust82of 100
Uptime, 30 days98%
Latency p50870 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "citation-lookup": {
      "type": "http",
      "url": "https://loupe.legal/mcp-public"
    }
  }
}
claude mcp add --transport http citation-lookup https://loupe.legal/mcp-public
[mcp_servers.citation-lookup]
url = "https://loupe.legal/mcp-public"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "citation-lookup": {
      "type": "remote",
      "url": "https://loupe.legal/mcp-public",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "citation-lookup": {
      "type": "http",
      "url": "https://loupe.legal/mcp-public"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=citation-lookup&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbG91cGUubGVnYWwvbWNwLXB1YmxpYyJ9"
}
{
  "servers": {
    "citation-lookup": {
      "type": "http",
      "url": "https://loupe.legal/mcp-public"
    }
  }
}
{
  "mcpServers": {
    "citation-lookup": {
      "httpUrl": "https://loupe.legal/mcp-public"
    }
  }
}
extensions:
  "citation-lookup":
    enabled: true
    name: "citation-lookup"
    type: streamable_http
    uri: "https://loupe.legal/mcp-public"
    timeout: 300

Quality 91 / 100strong

protocol75 · weight 25
  • warn
    protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
  • n/a
    protocol.statelessonly applies to 2026-07-28 servers
  • pass
    protocol.transportstreamable HTTP
  • n/a
    protocol.list_ttlonly applies to 2026-07-28 servers
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations2 of 2 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 256 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changesno tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

2 tools, about 256 tokens to load them all · tool set f79d290d48f1 · checked 2026-10-21 03:46 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 82 / 100

no-repository
provenance55
liveness99
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-98% +updated-24d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://loupe.legal/mcp-public streamable-httpnoneyes98%870 ms2025-11-252026-10-21

Tools (2)

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.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "legal.loupe/citation-lookup",
  "title": "Loupe: free citation lookup",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://loupe.legal/mcp-public",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "websiteUrl": "https://loupe.legal/data",
  "description": "Check if a US legal citation exists, names its case and has a valid pin cite; or find a case. Free."
}