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EU Publications Office Cellar: SPARQL Query

cellar/sparql-select

Runs a read-only SPARQL SELECT query against Cellar, the Publications Office of the European Union's repository of EU legal acts, treaties, case law and publications (CDM ontology). You write the SPARQL, for example PREFIX cdm: <http://publications.europa.eu/ontology/cdm#> SELECT ?work ?date WHERE { ?work cdm:work_date_document ?date } LIMIT 5. The answer is the standard SPARQL JSON result: `head.vars` and `results.bindings`, one object per solution with each variable as {type, value} (plus datatype or xml:lang). The query must end with LIMIT n (1 to 100), optionally followed by OFFSET m; page with OFFSET. SELECT only (PREFIX lines allowed before it), at most 2000 characters, no SERVICE clause. A query that matches nothing returns empty bindings. Use celex-lookup for the common case of one act by its CELEX number.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

Publications Office of the European Union

Data from the Publications Office of the European Union (Cellar), reusable with the source acknowledged under the Office's copyright notice (https://op.europa.eu/en/web/about-us/legal-notices/publications-office-of-the-european-union-copyright), passed through unmodified. Served by Eden Engine; not an official Publications Office product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

Install itCreate an account
agent
// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "cellar/sparql-select" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "cellar/sparql-select" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "cellar/sparql-select", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "cellar/sparql-select", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

ChargePrice
Per call
$0.0026
Updated
Oct 25, 2026

Input and output schemas

Input schema
input_schema.json
{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "query": {
      "type": "string",
      "pattern": "^(?![\\s\\S]*(?:(?:^|[^A-Za-z?$:])[Ss][Ee][Rr][Vv][Ii][Cc][Ee](?![A-Za-z0-9_.-]*:)|\\\\[uU]))(\\s*([Pp][Rr][Ee][Ff][Ii][Xx]\\s+[A-Za-z0-9_.-]*:\\s*<[^<>\\s]*>|[Bb][Aa][Ss][Ee]\\s*<[^<>\\s]*>))*\\s*[Ss][Ee][Ll][Ee][Cc][Tt]\\b[\\s\\S]*\\b[Ll][Ii][Mm][Ii][Tt]\\s+([1-9][0-9]?|100)(\\s+[Oo][Ff][Ff][Ss][Ee][Tt]\\s+[0-9]{1,7})?\\s*$",
      "maxLength": 2000,
      "minLength": 20,
      "description": "A SPARQL SELECT query of at most 2000 characters that ends with LIMIT n (n from 1 to 100), optionally followed by OFFSET m, for example SELECT ?s ?p ?o WHERE {?s ?p ?o} LIMIT 5. PREFIX or BASE lines may come first. A query without the LIMIT, one with a limit above 100, one that is not a SELECT, one containing a SERVICE clause, or one containing a Unicode escape sequence (a backslash followed by u or U) is refused before any call is made; a query the SPARQL parser rejects is refused as invalid."
    }
  },
  "additionalProperties": false
}
Output schema
output_schema.json
{
  "type": "object",
  "required": [
    "head",
    "results"
  ],
  "properties": {
    "head": {
      "type": "object",
      "properties": {
        "vars": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "The selected variable names."
        }
      },
      "additionalProperties": true
    },
    "results": {
      "type": "object",
      "required": [
        "bindings"
      ],
      "properties": {
        "bindings": {
          "type": "array",
          "items": {
            "type": "object",
            "description": "One solution: each selected variable maps to {type, value}, plus xml:lang or datatype where the term has one.",
            "additionalProperties": true
          },
          "description": "One object per solution; empty when the query matches nothing."
        }
      },
      "additionalProperties": true
    }
  },
  "description": "The standard SPARQL 1.1 JSON result of the SELECT query.",
  "additionalProperties": true
}