Cz Eli MCP Server

cz-eli-mcp

An MCP server for the Czech e-Sbirka legal database (e-sbirka.gov.cz), the official Collection of Laws (Sbirka zakonu), via its open-data SPARQL endpoint. It searches acts and fetches their full consolidated text, with verifiable citations.

Part of the MateMatic eu-legal-mcp production line - after PL, DE, AT, ES, FI, IE, NL, SE, FR, LU and DK. Same citation contract, e-Sbirka source. This is the first connector in the line that talks SPARQL/RDF rather than a REST/XML API.

Scope. This MVP searches acts (by year and/or a citation substring), returns metadata, and assembles the full consolidated text of the latest version. ~92,000 acts, updated daily, licensed CC BY 4.0. Language: Czech. Every response carries a dataset_note.

ELI is national, not data.europa.eu. The act IRI follows the ELI URI template (eli/cz/sb/{year}/{number}) but is minted by the e-Sbirka open-data graph (opendata.eselpoint.gov.cz), not resolvable on data.europa.eu. The readable page is on e-sbirka.gov.cz. Every response carries an eli_note saying so.

Text is assembled, not a single file. e-Sbirka exposes the consolidated text as ordered HTML fragments over SPARQL; cz_get_text reconstructs the plain text from them. There is no single official XML/PDF manifestation.

The tools

Every response carries the contract: eli_uri (the national ELI IRI, e.g. https://opendata.eselpoint.gov.cz/esel-esb/eli/cz/sb/2019/110), human_readable_citation (e.g. 110/2019 Sb.), and source_url (the e-sbirka.gov.cz page).

Install

Run it with no install step (once published to PyPI):

uvx cz-eli-mcp

Or from source:

cd cz-eli-mcp
pip install -e .

Configure (Claude Code / any MCP client)

{
  "mcpServers": {
    "cz-eli-mcp": { "command": "cz-eli-mcp" }
  }
}

Environment:

• CZ_ELI_ENDPOINT - default https://opendata.eselpoint.gov.cz/sparql
• CZ_ELI_CACHE_DIR - default ~/.matematic/cache/cz-eli
• CZ_ELI_AUDIT_DIR - default ~/.matematic/audit

No API key. The e-Sbirka open-data SPARQL endpoint is keyless.

Governance

• Public data only - read-only SPARQL against e-Sbirka; no client data leaves the machine.
• Audit log - every tool call appends one JSON line to ~/.matematic/audit/cz-eli-mcp.jsonl.
• Vendor-neutral - talks only to opendata.eselpoint.gov.cz; no LLM provider, no telemetry.
• Verifiable citations - every response is independently checkable via source_url.

See CONSTITUTION.md and DISCOVERY.md.

Tests

pip install -e ".[dev]"
pytest tests/test_instructions_drift.py tests/test_parse.py -v   # offline
pytest tests/test_smoke.py -v                                    # hits the live SPARQL endpoint

Licence

Apache-2.0. © Matematic Solutions / Wieslaw Mazur. e-Sbirka data is CC BY 4.0 (Czech Ministry of the Interior); relayed with attribution and a source_url.