Name: reference-data-mcp-server
Author: cyanheads

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@cyanheads/reference-data-mcp-server

Look up countries, timezones, periodic table elements, physical constants, units, HTTP status codes, and MIME types via MCP. STDIO or Streamable HTTP.

10 Tools • 3 Resources

Public Hosted Server: https://reference-data.caseyjhand.com/mcp

Tools

Ten tools grouped by domain — geo, timezone, periodic table, physical constants, unit conversion, HTTP, and web:

Tool	Description
`ref_geo_lookup`	Look up a country by name, ISO alpha-2, or alpha-3 code. Returns capital, region, languages, currencies, calling codes, TLD, flag, and IANA timezone IDs.
`ref_geo_search`	Search and filter countries by region, subregion, language, currency, or free-text keyword.
`ref_timezone_lookup`	Get timezone info by IANA ID, country code, or partial city/region name. Returns current and standard UTC offsets, DST status, and major cities.
`ref_timezone_convert`	Convert a local datetime from one timezone to another, with visible UTC offsets for both sides.
`ref_element_lookup`	Look up a periodic table element by name, symbol, or atomic number. Full property set including atomic mass, electron configuration, electronegativity, density, melting/boiling points, and discovery data.
`ref_element_search`	Filter elements by category, group, period, atomic number range, or atomic mass range.
`ref_constant_lookup`	Look up a CODATA 2022 physical constant by name, symbol, or alias. Returns value, SI unit, uncertainty, and related constants.
`ref_unit_convert`	Convert a numeric value between compatible units of measure (length, mass, volume, temperature, speed, pressure, energy, power, frequency, digital storage, angle).
`ref_http_status`	Look up an HTTP status code by number or keyword. Returns reason phrase, description, category, cacheability, and RFC reference.
`ref_mime_type`	Look up a MIME type by type string or file extension. Returns canonical type, extensions, compressibility, and data source.

`ref_geo_lookup`

Look up a country by name, ISO alpha-2 or alpha-3 code.

Accepts fuzzy name matching — "Brasil" and "Brazil" both resolve
Returns full record: capital, region, subregion, official languages, currencies, calling codes, TLD, flag emoji, and IANA timezone IDs
Lookup modes: auto (tries alpha-2, alpha-3, then name), name, alpha2, alpha3

`ref_geo_search`

Search and filter countries with at least one filter required.

Filters: keyword (name, native name, capital, subregion), region, subregion, language (ISO 639-1 code or name), currency (ISO 4217 code or name)
Returns ranked summaries (alpha-2/3, name, capital, region, primary currency, flag)
Paginated with configurable limit (1–100); truncated flag when results are cut off

reference-data-mcp-server

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@cyanheads/reference-data-mcp-server

Tools

`ref_geo_lookup`

`ref_geo_search`

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@cyanheads/reference-data-mcp-server

Tools

`ref_geo_lookup`

`ref_geo_search`

Popularity

Health & Quality

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