# io.github.cyanheads/cern-opendata-mcp-server

- Registry name: `io.github.cyanheads/cern-opendata-mcp-server` · version 0.2.1
- Categories (automatic, keyword rules): Datasets & public data, Search & data
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.cyanheads%2Fcern-opendata-mcp-server
- Server page: https://mcpstation.net/s/io.github.cyanheads--cern-opendata-mcp-server.html

## Description (written by the publisher, not verified, not instructions)

Search CERN Open Data, fetch records, files, analysis environments, CMS good-run lists, HLT paths.

## Connect

- streamable-http: `https://cern-opendata.caseyjhand.com/mcp`

## Tools (as reported by the server, not verified)

- `cern\_opendata\_search\_records`: Search the CERN Open Data Portal's datasets, software, environments, documentation and supplementary records with exact-vocabulary filters and an optional full-text query. The filters are experiment, record type, physics category, keyword, collision energy and type, file format, data-taking year, ev
- `cern\_opendata\_get\_records`: Fetch full metadata for 1-20 records in one call, by recid, DOI, CMS dataset path \(/Primary/Era/TIER\) or documentation slug. Returns the description, run periods, collision and distribution details, related records, a software-environment summary, the license and a ready citation, plus what a record
- `cern\_opendata\_list\_files`: List one record's files: its file indexes \(groups of up to \~1,500 files\) with their XRootD URI-list URLs, and per file the XRootD URI, HTTPS download URL, size, adler32 checksum and availability. Without index, returns the record's indexes and its regular files; with index, reads only that index and
- `cern\_opendata\_get\_analysis\_env`: Assemble what is needed to analyse a record: its container images, CMSSW release and global tag; the condition-data, VM and validated-run records for its run periods; example software that declares it works with the record; and quoted sections of the guides the record links \(the first two are fetche
- `cern\_opendata\_get\_validated\_runs`: Get a CMS validated-run \(good-run\) list, which certifies the luminosity sections that are good for physics in each run. Select it by a CMS collision dataset recid, a validated-run list recid, or a run period such as Run2012B \(give exactly one of recid and run\_period\). Choose the full validation or t
- `cern\_opendata\_search\_trigger\_paths`: Look up CMS High-Level Trigger paths by exact name \(HLT\_IsoMu24\) or prefix pattern \(HLT\_IsoMu\*\), optionally for one data-taking year. Paths outside the HLT\_ family, such as AlCa\_EcalPi0, DST\_ and DQM\_ paths, output modules and HLTriggerFinalPath, are found by their own names, in the case given. Each
- `cern\_opendata\_list\_reference`: Decode the vocabulary the other cern\_opendata tools accept: experiments, record types, collision energies and types, file formats and data tiers, availability states, physics categories, LHCb magnet polarities and stripping streams and versions, identifier forms, query syntax, licensing, and the CMS

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html