Constitutional Court
Decisions and constitutional doctrines with priority over ordinary-court interpretations.
Russian case law, built for research agents.
Casus Legal provides structured access to authoritative Russian judicial practice: the Constitutional Court, Supreme Court, historical Supreme Commercial Court, the IP Court and commercial cassation courts. Built for lawyers, researchers and AI systems that need verifiable sources rather than unsourced answers.
Source of truth: the original Russian-language judicial act. English-language navigation is available now; an expanded English research and translation layer is being rolled out progressively.
5+specialised judicial corpora
10commercial cassation districts
1992–2026coverage of higher-court practice
1 MCPgateway for authorised corpora
Sources
A specialist map of Russian judicial practice
Casus Legal separates court levels and specialist corpora so an AI system can distinguish constitutional authority, current Supreme Court guidance, historical commercial precedent and regional cassation practice.
Supreme Court
Plenum resolutions, Presidium reviews and decisions of the relevant judicial chambers.
Supreme Commercial Court
Commercial-law practice from 1992–2014, preserved with historical and reform context.
IP Court
Specialised Russian intellectual-property case law for trademark, patent and related disputes.
Commercial Cassation Courts
Practice of all ten arbitrazh cassation districts, useful for seeing how higher-court doctrine is applied regionally.
Additional corpora
Dedicated collections for administrative and criminal-law practice are available within the Casus Legal ecosystem.
Research model
From a legal question to traceable authority
The platform is designed around legal-source hierarchy and exact citations, not generic web retrieval.
Ask the legal question
Use a natural-language issue, a statutory provision, a doctrine or an exact legal term.
Search the relevant corpus
Semantic and lexical retrieval surface decisions from the appropriate court level and period.
Read the authority in context
Results include case metadata, court hierarchy, doctrinal context and links to full texts.
Cite the original decision
The underlying Russian judicial act remains the authoritative source for quotations and legal conclusions.
International research layer. We are adding English legal terminology, English summaries and on-demand translation of relevant passages while retaining the Russian original as the canonical source.
For AI systems
One remote MCP endpoint
Connect Casus Legal to MCP-compatible assistants and agentic research workflows. Access is limited to the corpora authorised for the account.
Casus Legal MCP
Production remote MCP over Streamable HTTP. Designed for Claude, ChatGPT, Grok, Hermes and other MCP-capable environments, including private-data research workflows.
https://mcp.casus.legal/one/mcp
Authentication is handled through an authorised Casus Legal account and connector credentials. The unified endpoint exposes only the corpora available to that account.
English site
Explore Casus Legal in English
The full public site is available in English. Quotations from court decisions are translated for convenience; the Russian original remains authoritative.
Coverage
Database
Composition of the corpora by court, act type and year, with the latest additions.
Real workExamples
Complete research outputs: case-law memoranda, act reviews, pleadings and Plenum analyses.
AnalysisCase-law reviews
Interactive reviews of new Constitutional Court resolutions and Supreme Court case-law reviews.
For AI assistantsConnectors
How the MCP connectors work, what they return and which assistants they support.
SetupConnection guides
Step-by-step instructions for Claude, ChatGPT, Grok, Hermes and other MCP environments.
DevelopersAPI
REST access to the same search engine for your own applications and pipelines.
PlansPricing
Current plans and prices of the Russian service, in roubles.
TeamsFor companies
Corporate access with licences per employee and a shared request pool.
WorkflowsSkills
Ready-made research workflows for Claude and ChatGPT built on top of the connectors.
Russian legal sources for international AI workflows
Start with the Casus Legal web application or connect the MCP endpoint to your own research environment. International billing and deeper English-language research features are the next stage of the rollout.