MCP 服务器

kvasir-legal

Verifiable German, Austrian, Swiss and EU law: resolve citations to the wording in force, verify the citations a model produced against the official source, and walk the citation graph.

README

kvasir-mcp

MCP server for verifiable German, Austrian, Swiss and EU law. Resolve, search and verify legal citations against the official sources — from any MCP client.

This repository documents the hosted server. There is nothing to install and no local build: point your client at the endpoint below.

https://kvasir.legal/mcp

Transport: streamable HTTP. Auth: OAuth (most clients discover it automatically) or an X-API-Key header. A free account with 2,000 monthly units is at kvasir.legal/signup; reading law on the site needs no account at all.

Why

Language models answer legal questions from a training snapshot. They paraphrase amended provisions, cite repealed directives, and cannot say which version an answer relied on. This server gives an agent the two operations that fix that: resolve a citation to the wording in force, and verify the citations the agent itself produced.

Coverage

Jurisdiction	Statutes	Case law
Germany — federal	✅	✅ (federal courts)
Bavaria	✅	✅
North Rhine-Westphalia	✅	✅
Saxony · Brandenburg · Bremen	✅	—
Austria	✅	✅ (OGH, VfGH, VwGH)
Switzerland	✅	—
EU	✅ incl. delegated & implementing acts, Commission guidelines	✅ (CJEU, General Court)

~460,000 norms, ~512,000 decisions, ~1.4 million typed citation edges. Sources are checked daily (weekly for Saxony and Bremen). Repealed acts stay in the corpus, flagged as repealed. Live counts and per-source timestamps: /api/v1/status.

Tools

Tool	Use it when
`resolve_citation`	you have a citation string — „§ 573 Abs. 2 BGB", „Art. 6 GDPR"
`search_legal`	you have a question or topic, not a citation
`check_draft`	you have a full draft, memo or brief — citations and quoted wording
`verify_citations`	you have a bare list of references to check
`get_legal_object`	you have a canonical URI
`get_legal_objects`	you need several objects at once
`get_legal_relations`	you want the citation graph from one node
`legal_uri_grammar`	you want to build URIs yourself

Arguments, limits and response shapes: kvasir.legal/developers/mcp-tools.

Example

Ask your agent: „Which decisions cite Art. 6 GDPR?" — it calls get_legal_relations on norm:eu:GDPR:art_6 and gets the citing decisions with court, docket number and canonical URI, ordered by authority.

Or without any client:

curl -s "https://kvasir.legal/api/v1/relations/norm:eu:GDPR:art_6?direction=in&limit=5"

Honest limits

Verification is a fact about this corpus. A miss means „not found here" — a typo or a coverage gap — not „this citation is fake".
A citation can exist, be current, be quoted correctly, and still be the wrong authority for the question. This is not legal advice.
Commission guidelines are interpretive, not binding law, and are labelled as such.
No case law yet for Switzerland, Saxony, Brandenburg and Bremen.