io.github.cyanheads/reference-data-mcp-server

up checked 2026-11-10T21:37:47.759Z

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Publisher-provided description

Countries, timezones, elements, constants, HTTP status codes, unit conversion, and MIME type lookup.

Summary by lookupd

Looks up countries, timezones, elements, physical constants, HTTP status codes, MIME types, and converts units and timezones.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http reference-data-mcp-server https://reference-data.caseyjhand.com/mcp

Claude Code, npm package (stdio)

claude mcp add reference-data-mcp-server -- npx -y @cyanheads/reference-data-mcp-server

Claude Code, npm package (stdio)

claude mcp add reference-data-mcp-server -- npx -y @cyanheads/reference-data-mcp-server

Codex, remote (streamable-http)

codex mcp add reference-data-mcp-server --url https://reference-data.caseyjhand.com/mcp

Codex, npm package (stdio)

codex mcp add reference-data-mcp-server -- npx -y @cyanheads/reference-data-mcp-server

Codex, npm package (stdio)

codex mcp add reference-data-mcp-server -- npx -y @cyanheads/reference-data-mcp-server

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "reference-data-mcp-server": {
      "url": "https://reference-data.caseyjhand.com/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "reference-data-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/reference-data-mcp-server"
      ]
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "reference-data-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/reference-data-mcp-server"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (10 tools)

Publisher-provided text

• ref_geo_lookup Look up a country by name, ISO alpha-2 code (2 letters), or ISO alpha-3 code (3 letters). Returns the full record: capital, region, official languages, currenci
• ref_geo_search Search and filter countries by region, subregion, language, currency, or free-text keyword. At least one filter is required. Returns a ranked list of matching c
• ref_timezone_lookup Get timezone info by IANA ID, country code, or partial city/region name. Returns current UTC offset, standard offset, whether DST is currently active, and major
• ref_timezone_convert Convert a local datetime from one timezone to another. Takes a local time string (no UTC offset, e.g., "2026-05-24T15:30:00") interpreted as local time in the s
• ref_element_lookup Look up a periodic table element by name, chemical symbol, or atomic number. Returns the full data record: atomic number, symbol, name, atomic mass (in unified
• ref_element_search Filter periodic table elements by category, group, period, atomic number range, or atomic mass range. At least one filter is required. Returns matching elements
• ref_constant_lookup Look up a fundamental physical constant by name, symbol, or common alias. Returns the CODATA 2022 value, SI unit expression, relative standard uncertainty, and
• ref_unit_convert Convert a numeric value between compatible units of measure. Supports: length (mm, cm, m, km, in, ft, yd, mi), mass (mcg, mg, g, kg, oz, lb, mt = metric tonne /
• ref_http_status Look up an HTTP status code by number or keyword. Returns the reason phrase, description, category (1xx Informational, 2xx Success, 3xx Redirection, 4xx Client
• ref_mime_type Look up a MIME type by type string or file extension. Accepts "image/webp", ".webp", or "webp". Returns the canonical MIME type, known file extensions, whether

Details

• Version: 0.2.0
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 788 ms
• First indexed: 2026-11-01T09:26:34.297Z
• Last seen in registry: 2026-11-01T09:26:34.567Z
• Repository: https://github.com/cyanheads/reference-data-mcp-server.git

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