Reliable legal context for AI

Catch AI hallucinations before they become a risk

2 of 8 citations not in the corpus

Entwurf · KI-AssistentAz. 4 O 128/26

In Sachen

M. GmbH ./. R. Betriebsgesellschaft mbH

wegen Verkehrssicherungspflicht

nehmen wir wie folgt Stellung:

1Wer eine Gefahrenlage schafft oder andauern lässt, hat die notwendigen und zumutbaren Vorkehrungen zu treffen, um eine Schädigung Dritter möglichst zu verhindern; verletzt der Betreiber diese Verkehrssicherungspflicht, haftet er nach § 823 Abs. 1 BGB. Eine Räum- und Streupflicht setzt dabei allgemeine Glätte oder erkennbare Anhaltspunkte für eine ernsthaft drohende Gefahr voraus (BGH, VI ZR 254/16); ihr Umfang bestimmt sich nach den berechtigten Sicherheitserwartungen des Verkehrs (BGH, XIV ZR 486/13).

2Für Verkaufsflächen mit erheblichem Publikumsverkehr gelten gesteigerte Kontroll- und Reinigungspflichten; kommt ein Kunde gleichwohl zu Fall, kommen ihm hinsichtlich der Pflichtverletzung Beweiserleichterungen zugute (BGH, VI ZR 1283/20). Für die markierten Stellflächen eines Kundenparkplatzes besteht dagegen keine generelle Streupflicht (BGH, VI ZR 184/18).

3Bei erkennbar glättegefährdetem Untergrund ist überdies ein Mitverschulden des Gestürzten nach § 254 BGB zu berücksichtigen; ein haftungsausschließendes überwiegendes Mitverschulden darf allerdings nur auf tragfähige Feststellungen gestützt werden (BGH, III ZR 326/12). Für eine darüber hinausgehende, verschuldensunabhängige Einstandspflicht des Betreibers fehlt jede Grundlage (LG Siegburg, 4 O 99/12).

DetectedCheckedHallucinatedCheckedCheckedDetectedCheckedHallucinated

Rechtsanwältin

Entwurf · nicht eingereichtSeite 1

Klaracase checks the case citations in AI drafts against its own corpus in real time, as an MCP server or REST API.

Paste any legal text. Klaracase checks the case citations in it against the corpus, live. § references are detected and marked not yet verifiable. What holds is confirmed. What does not is flagged.

All use cases

01 · 3 places it runs · one legal corpus

One check. Everywhere decisions get made.

Klaracase checks cited case-law references against your corpus in real time – in the inbox, before a draft goes out, and directly inside your AI workflows.

Inbound triage

Spot hallucinated references in incoming mail

Some claims and cease-and-desist letters cite decisions that don't exist. Klaracase checks every cited reference against your corpus as mail arrives – so your team never wastes time on a letter with no real basis.

Check inbound mail

§ 823 Abs. 1 BGB·§ 286 ZPO·BVerwG, 2 A 1/18·§ 1 KSchG·BGH, 6 StR 430/23·§ 253 Abs. 2 BGB

Art. 20 Abs. 3 GG·§ 307 BGB·BSG, B 6 KA 11/21 R·§ 535 BGB·§ 35 VwVfG·§ 280 Abs. 1 BGB

BFH, IX B 117/19·§ 249 BGB·BVerfG, 2 BvL 1/09·BVerwG, 4 BN 7/18·§ 254 BGB·§ 241 Abs. 2 BGB

§ 1004 BGB·BGH, VI ZR 184/18·§ 15 AGG·§ 823 Abs. 1 BGB·§ 286 ZPO·BVerwG, 2 A 1/18

§ 626 BGB·§ 263 StGB·§ 43 GmbHG·Art. 20 Abs. 3 GG·§ 307 BGB·BSG, B 6 KA 11/21 R

Art. 12 GG·§ 812 BGB·BVerfG, 1 BvR 3165/15·BFH, IX B 117/19·§ 249 BGB·BVerfG, 2 BvL 1/09

§ 3 UWG·BGH, VI ZR 254/16·BGH, VI ZR 1283/20·§ 1004 BGB·BGH, VI ZR 184/18·§ 15 AGG

§ 253 Abs. 2 BGB·BAG, 9 AZR 312/20·Art. 6 DSGVO·§ 626 BGB·§ 263 StGB·§ 43 GmbHG

§ 280 Abs. 1 BGB·§ 522 Abs. 2 ZPO·§ 113 VwGO·Art. 12 GG·§ 812 BGB·BVerfG, 1 BvR 3165/15

§ 241 Abs. 2 BGB·BGH, III ZR 326/12·§ 287 ZPO·§ 3 UWG·BGH, VI ZR 254/16·BGH, VI ZR 1283/20

BVerwG, 2 A 1/18·§ 1 KSchG·BGH, 6 StR 430/23·§ 253 Abs. 2 BGB·BAG, 9 AZR 312/20·Art. 6 DSGVO

BSG, B 6 KA 11/21 R·§ 535 BGB·§ 35 VwVfG·§ 280 Abs. 1 BGB·§ 522 Abs. 2 ZPO·§ 113 VwGO

BVerfG, 2 BvL 1/09·BVerwG, 4 BN 7/18·§ 254 BGB·§ 241 Abs. 2 BGB·BGH, III ZR 326/12·§ 287 ZPO

§ 15 AGG·§ 823 Abs. 1 BGB·§ 286 ZPO·BVerwG, 2 A 1/18·§ 1 KSchG·BGH, 6 StR 430/23

§ 43 GmbHG·Art. 20 Abs. 3 GG·§ 307 BGB·BSG, B 6 KA 11/21 R·§ 535 BGB·§ 35 VwVfG

BVerfG, 1 BvR 3165/15·BFH, IX B 117/19·§ 249 BGB·BVerfG, 2 BvL 1/09·BVerwG, 4 BN 7/18·§ 254 BGB

02 · Infrastructure

Every question gets its own reference network, not just a list of hits.

Klaracase reads your question by wording and by meaning, both at once, across a corpus of more than 510,000 decisions. The closest passages arrive with their already-resolved reference network, and that becomes the context package for this one question.

More than 1,900 courtsCase law since 1946More than 14M references

01Question
Your legal question in plain words
you ask the way you would in a memo, not in search operators
02Hits
The closest passages
from the entire corpus, not from a pre-sorted selection
03Citation
Down to the paragraph number
every statement backed by court, docket number and paragraph
04Reference network
Cited decisions and provisions
already resolved in the corpus: BGH, XI ZR 12/09 cites § 204 (1) no. 3 BGB
05Context
Sourced context, ready to use
for your file, or over the API for your agent

The corpus in detail

03 · Legal Discovery Graph

Intelligent research, reimagined

State-of-the-art graph and database technologies interlink the German legal corpus at a deep level, surface hidden connections, and provide unique context for demanding expert research.

Reference types: cited, decisive, procedural

Checked against the corpus, not the open web

Why anchoring matters

Answers you can hand to a court, not just to a chatbot.

Legal research fails quietly: a citation that looks right, a paragraph that has been overturned, a source that never existed. The cost surfaces late: in a brief, in a hearing.

Klaracase is built the other way around: every claim enters the system anchored to its source, and everything downstream preserves that anchor.

Measured: without sources, three AI models cited 168 of 374 case numbers we could not confirm. With our data, 1 of 471.

See the benchmark

04 · Features

What Klaracase is built on

Four capabilities, one foundation: every result stays traceable to its source. Each draws on the same structured legal data, German case law and statutes linked into a citation graph, so you get an answer you can check down to the exact source, not a plausible guess.

Citation CheckCheck the case citations in any legal text against the corpus, live.Legal Discovery GraphFollow millions of citations between decisions.Source anchoringEvery result traces to the decision document, down to the paragraph.Klara MCP & APIThe full corpus behind a REST API and an MCP server.

All features

05 · Use cases

What you do with it

Five jobs Klaracase does for legal teams, from triaging the inbox to reviewing the opposing brief. All draw on the same evidenced corpus, so the results hold up to scrutiny and cite the decisions and statutes they rest on.

For developersAgentic workflowsGround your agents on verifiable German case law via API and MCP.For legal departmentsInbound triageTriage a flood of incoming claims and letters faster.For law firmsOpposing briefsCheck the citations in opposing counsel's brief.For law firmsAI safeguardingVerify AI-drafted text before it reaches a court.For law firmsLeading decisionsFind the decisions that actually carry the reasoning.

All use cases

06 · Connect

Klara MCP

Connect your agents, ChatGPT, or Claude to our MCP server to demonstrably reduce hallucinations in what they write. Your own applications can use the same operations through the REST API.

In our benchmark, with our data: 1 of 471 case numbers not confirmed

Credit-metered, token-authenticated

OpenAPI spec + MCP tool schemas + a field-by-field tool guide

Klara MCP and API in depth

Built and operated in Germany

Server location: GermanyDedicated servers hosted by Hetzner in Germany. Backups stay in Frankfurt (eu-central-1).

GDPR-compliantData processing under Art. 28 GDPR agreements. Every recipient is disclosed in the privacy policy.

Built in GermanyBuilt for German law: court decisions, statutes and citations from German sources.

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