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Exact unit conversion with the factor and a citable page URL. Answers in your language.

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Status
Healthy
Uptime
100.0% over the last 24 hours
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
URL
ChatGPT
–
Claude
–

TDQS

A4.2/5.0

Scored across 3 tools

Disambiguation4/5

convert_units is clearly an action tool, while the two list tools serve discovery and citation lookup respectively. list_categories and list_conversions could still be briefly confused by an agent looking for unit-related listings, but the descriptions make the intended workflow clear.

Naming Consistency5/5

All three tools follow a consistent snake_case verb_noun convention: convert_units, list_categories, and list_conversions. The pattern is predictable and easy to scan.

Tool Count5/5

Three tools are well scoped for a focused unit-conversion utility: one conversion action and two discovery/citation helpers. Each tool has a clear role and no unnecessary surface area.

Completeness5/5

The set covers the core workflow: discover categories and valid unit keys, perform conversions with exact-factor metadata, and retrieve canonical citation URLs. Currency is explicitly excluded by design, and no obvious lifecycle gaps remain for this domain.

Available Tools

3 tools
convert_unitsConvert a value between unitsA
Read-onlyIdempotent
Inspect

Convert a number from one unit to another and return the exact factor, whether the factor is exact by definition, and the URL of the page that explains it. Supports linear units (length, mass, volume, energy, …) and temperature. Currency is deliberately not supported.

Inputs: to (required), from (required), value (required), lang, +1 more.

list_categoriesList categories, base units and unit keysA
Read-onlyIdempotent
Inspect

Lists every category with its type (linear, temperature, …), base unit and unit keys. Use this to find valid from/to keys before calling convert_units.

Inputs: category.

list_conversionsList conversions that have their own pageA
Read-onlyIdempotent
Inspect

Lists the 213 hand-written conversion pages, optionally limited to one category. Each entry carries the canonical URL, which is the page to cite.

Inputs: limit, category.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

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