# cernopendata.records.search

Search 80,000+ particle physics records from the CERN Open Data portal, covering CMS, ATLAS, ALICE, LHCb, and legacy experiments. Filter by record type (Dataset, Documentation, Software, Supplementaries), experiment, and keyword. Each record includes title, type, experiment, publication date, availability, collision energy, abstract snippet, and collections. Supports pagination. Free, no auth required. Records include collision and simulated datasets in NanoAOD/MiniAOD/AOD format, plus educational resources, software, and documentation from the Large Hadron Collider era.

Agent View of the PolicyLayer registry record for `cernopendata.records.search`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/cernopendata.records.search

## Facts

- Tool: `cernopendata.records.search`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 5
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `q` | string | no | Full-text search query (e.g. "higgs boson", "dark matter", "Z boson decay") |
| `page` | integer | no | Page number for pagination (default 1) |
| `type` | string | no | Filter by record type: Dataset (collision/simulated data), Documentation, Software, Supplementaries, Environment, Glossary, News |
| `limit` | integer | no | Number of results to return (1–25, default 10) |
| `experiment` | string | no | Filter by CERN experiment (e.g. CMS, ATLAS, ALICE, LHCb). CMS has the most open data. |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "cernopendata.records.search",
    "arguments": {}
  }
}
```

## Why cernopendata.records.search is rated Low

Tool queries public scientific data with no side effects or modification capabilities.

From the tool's own definition: "Search 80,000+ particle physics records from CERN Open Data portal. Filter by type, experiment, keyword."

## Use case

AI agents call cernopendata.records.search to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "cernopendata.records.search": {}
  }
}
```

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- `infra.cloudflare.purge_cache` — Destructive — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/infra.cloudflare.purge-cache.md
- `polymarket.trading.cancel_order` — Destructive — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/polymarket.trading.cancel-order.md
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- `document.convert.web_to_pdf` — Execute — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/document.convert.web-to-pdf.md
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- …and 1353 more: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase