Connectors link Claude, ChatGPT, Grok or Hermes to the case law of Russia’s higher courts (Constitutional Court, Supreme Court, Supreme Commercial Court), the database of the Intellectual Property Court, the database of administrative cases of the Judicial Chamber for Administrative Cases of the Supreme Court of the Russian Federation, and the database of criminal cases of the Judicial Chamber for Criminal Cases of the Supreme Court of the Russian Federation. Your model answers based on actual judicial acts rather than training data.
Generative models have a weakness that is particularly problematic for lawyers: they readily cite judicial acts that do not exist. Plausible particulars, a convincing factual background, but the case is fictional.
CasusLegal removes the cause. The project is built on a structured database of case law from Russia’s highest courts: the Constitutional Court, the Supreme Court and the Supreme Commercial Court, dating back to 1992. The model works from this corpus rather than from what it absorbed during training, so every citation leads to a real judicial act. You can open it, read it in full and save it to Word. Search is based on the meaning of the query rather than matching wording: ask the question the way you are used to framing it in your work.
A connector (technically, it is built on the MCP, or Model Context Protocol) is a secure channel that connects your AI model to this database. Unlike a Telegram bot, it does not operate on a separate platform but is integrated directly into your workspace Claude, ChatGPT, Grok or Hermes.
You pay for the AI model itself and access case law without any limit on the number of queries. The connector imposes no additional limits.
Queries run within your projects and conversations, taking uploaded materials into account. Case law is selected for the specific task rather than in a vacuum.
The exchange is one-way: the model sends a query about case law and receives a response. The contents of your projects and documents are not sent outside.
One address https://mcp.casus.legal/one/mcp opens all the databases included in your subscription: the highest courts, the IP Court, the Administrative Chamber, the Criminal Chamber and the commercial cassation districts. The AI model selects the relevant corpus based on the question. For ChatGPT, start with the ready-made request in Work or Codex; the same page contains manual setup instructions with screenshots.
Case law of Russia’s Constitutional Court, Supreme Court and Supreme Commercial Court dating back to 1992. Address: https://mcp.casus.legal/mcp
IP Court case law for 2013–2026: trademarks, patents, copyright and related rights, means of individualization, domain names and unfair competition. Address: https://sip.casus.legal/mcp
Case law of the Judicial Chamber for Administrative Cases of the Supreme Court of the Russian Federation for 1994–2026: regulatory review, challenges to actions of public authorities, the Code of Administrative Court Procedure of the Russian Federation, cadastral value and election disputes. Address: https://kas.casus.legal/mcp
Case law of the Judicial Chamber for Criminal Cases and the Presidium of the Supreme Court of the Russian Federation for 1992–2026: classification of offences, sentencing, reclassification and acquittal, preventive measures, the Criminal Code of the Russian Federation and the Code of Criminal Procedure of the Russian Federation. Address: https://kud.casus.legal/mcp
An article-by-article scholarly commentary on the Civil Code of the Russian Federation (the “Glossa” series, editor-in-chief A.G. Karapetov): doctrine and interpretation of provisions, verbatim quotations with page references to the publication, and arguments for and against your position. Separate subscription: always ₽990 for 30 days in addition to the price of the database package; you can add it to the package by ticking a box in your account and pay in a single transaction. “Glossa” always has its own connector address: https://glossa-ai.ru/mcp. It is not included in the unified address /one/mcp — connect it separately alongside that address. Paid access begins on October 1, 2026: you can subscribe now, access will open immediately, and the paid 30-day period will begin on October 1. Subscribe in your account, the “Connectors” tab.
There is one login: use the same password as in your account or sign in through Telegram. In Claude, ChatGPT, Grok and Hermes add the unified address as an MCP server; there is no need to keep the individual database addresses alongside it, otherwise the AI model will see two identical sets of tools. In the Telegram bot and web chat, you do not need to select a database manually: ask your question and the system will route it to the appropriate corpus; an integrated switch is available for full control.
