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

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

1 0 tools GitHub

No known CVEs

No license

Actively maintained

Last commit 0d ago

Works with most clients

Transport: stdio

0 tools

Grade F

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Marketing

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-cyanheads-reference-data-mcp-server": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-cyanheads-reference-data-mcp-server)](https://mcppedia.org/s/io-github-cyanheads-reference-data-mcp-server)

Read me

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

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

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

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Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

33/100across 5 weighted dimensions

How we score →

0255075100

−67

Security

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Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

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This server is missing a description. Tools and install config are also missing.If you've used it, help the community.

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Frequently Asked Questions

Is io.github.cyanheads/reference-data-mcp-server safe to use?: io.github.cyanheads/reference-data-mcp-server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.cyanheads/reference-data-mcp-server?: io.github.cyanheads/reference-data-mcp-server can be installed by cloning its GitHub repository and following the setup instructions in the README.
What AI clients work with io.github.cyanheads/reference-data-mcp-server?: io.github.cyanheads/reference-data-mcp-server is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.
Is io.github.cyanheads/reference-data-mcp-server actively maintained?: io.github.cyanheads/reference-data-mcp-server is actively maintained — last commit was 0 days ago. It has 1 GitHub stars.

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

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, catego

Frequently Asked Questions

Is io.github.cyanheads/reference-data-mcp-server safe to use?

io.github.cyanheads/reference-data-mcp-server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.cyanheads/reference-data-mcp-server?

io.github.cyanheads/reference-data-mcp-server can be installed by cloning its GitHub repository and following the setup instructions in the README.

What AI clients work with io.github.cyanheads/reference-data-mcp-server?

io.github.cyanheads/reference-data-mcp-server is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.

Is io.github.cyanheads/reference-data-mcp-server actively maintained?

io.github.cyanheads/reference-data-mcp-server is actively maintained — last commit was 0 days ago. It has 1 GitHub stars.

@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, catego

... View full README on GitHub