Mozilla Data Collective
https://mozilladatacollective.com/api/mcp ↗
Description
Search the Mozilla Data Collective catalog of ethically sourced AI training datasets.
What our measurements say
Mozilla Data Collective is a remote MCP server published at mozilladatacollective.com. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 345 ms, placing it among the faster endpoints. It offers a narrow, focused set of 3 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool names ('search', 'fetch') are intuitive and action-oriented
- Parameters are well-typed with clear required/optional distinctions
Weaknesses
- Some parameter descriptions lack specificity (e.g., 'uploadDate' format not specified)
- Missing explicit error handling documentation
- Tool 'list_filters' has ambiguous name and incomplete parameter reference in description
search— 'uploadDate' parameter lacks format specificationlist_filters— Description mentions 'taskLabels' and 'licenseLabels' but these parameters are not in the tool's schemasearch— 'sortDirection' parameter could use explicit enum values (e.g., 'asc', 'desc')
Verdict
Event narrative
Sign up free to generateRaw observations
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 67ms → warm 67ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
searchSearch the Mozilla Data Collective catalog of AI training datasets by natural-language query, optionally narrowed by task, language, license, format, price, sample availability or publish date. Returns matching datasets as {id, title, url}; pass an id to the fetch tool for full details. Call list_filters first if you intend to filter — filter values must match the catalog exactly.
querystringrequiredlimitintegertaskarraylocalearraylicensearrayformatarrayisPaidbooleanhasSamplebooleansortstringsortDirectionstringuploadDatestring
fetchFetch the full public details of one Mozilla Data Collective dataset by id or slug: description, organization, task, locale, license, format, size, pricing, and its page URL.
idstringrequired
list_filtersList every value the search tool's filters accept: the tasks, locales, licenses and formats present in the catalog, plus the sort and date-range options. Task and license values are abbreviations, so taskLabels and licenseLabels spell them out. Filter values are matched exactly, so call this before filtering a search rather than guessing values. Takes no arguments.
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Dual-era
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