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MCP live MCP 2026-07-28 http ext: skills

reference-data-mcp-server

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

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

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
1523ms
last probe
Tools
10
callable
Resources
1
readable
Prompts
0
available
Primary URL
https://reference-data.caseyjhand.com/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
10 tools, 1 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
11 items in total; 3 or more earns these points.
pass Describes itself 10/10
100 characters; more than 30 earns these points.

Tools · 10

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, currencies, calling codes, TLD, flag emoji, and …

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 country summaries. Use ref_geo_lookup to …

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 cities in the timezone. When querying b…

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 source timezone, returns the equivalent l…

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 atomic mass units), electron configurati…

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 as a summary list. Use ref_element_look…

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 a short description. Recognizes common n…

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 / 1000 kg, t = US short ton / 907.18 kg),…

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 Error, 5xx Server Error), whether the co…

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 the type is compressible (relevant for C…

Resources · 1

reference-data-guide

Resolve country and timezone identities with ref_* tools before converting meeting times. Use for scheduling across locations, ambiguous timezone names, daylight-saving transitions, and checking count…

skill://reference-data-guide/SKILL.md

Skills · 1

reference-data-guide

Resolve country and timezone identities with ref_* tools before converting meeting times. Use for scheduling across locations, ambiguous timezone names, daylight-saving transitions, and checking count…

skill://reference-data-guide/SKILL.md
1 file

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://reference-data.caseyjhand.com/mcp

Cursor or Cline: add to your MCP config:

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