CasusLegal

Public Offer

for granting access to judicial-practice search connectors for AI assistants · v. 1.6 dated 27.09.2026

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1. General Provisions

1.1. This document constitutes a public offer made by an individual applying the special tax regime “Tax on Professional Income” (hereinafter, the Operator), addressed to an unlimited number of persons, and contains all material terms of the agreement for the provision of services granting access to an information service.

1.2. The Operator’s details (taxpayer identification number and contact details) are provided upon request through the feedback channel in the Service’s support chatbot.

1.3. Pursuant to Article 437 of the Civil Code of the Russian Federation, this document is recognized as a public offer.

1.4. Acceptance of this offer is effected by payment for the subscription. From the moment the funds are credited to the Operator’s account, the agreement is deemed concluded on the terms of this offer in the version effective on the payment date.

1.5. The person who accepts the offer (hereinafter, the User) confirms that they have read this offer, understand its contents and unconditionally accept all of its terms.

2. Definitions

2.1. Service — the CasusLegal case-law search information service, using artificial intelligence technologies.

2.2. Connector — a software module (MCP connector) that enables access to the Service from external AI assistants and returns search results from the case-law corpus to them. The Operator provides four connectors: “Higher Courts” (the corpus of case law of the Constitutional Court of the Russian Federation, the Supreme Court of the Russian Federation and the Supreme Commercial Court of the Russian Federation; address https://mcp.casus.legal/mcp), “IP Court” (the corpus of case law of the Intellectual Property Court; address https://sip.casus.legal/mcp), “Administrative Cases” (the corpus of case law of the Judicial Chamber for Administrative Cases of the Supreme Court of the Russian Federation; address https://kas.casus.legal/mcp) “Criminal Cases” (the corpus of case law of the Judicial Chamber for Criminal Cases and the Presidium of the Supreme Court of the Russian Federation in criminal cases; address https://kud.casus.legal/mcp) and cassation district databases — one for each of the ten commercial courts of the districts (Moscow, North-Western, Central, Volga-Vyatka, Volga, North Caucasus, Ural, West Siberian, East Siberian and Far Eastern districts; unified address https://mcp.casus.legal/okrug/mcp, addresses of individual districts are shown in the Personal Account). Access to each connector and each database is provided in accordance with the paid plan.

2.2.1. One address — the address https://mcp.casus.legal/one/mcp, through which all databases included in the User’s paid plan open to the User in a single connection (including as the CasusLegal One app in ChatGPT). The unified address neither extends nor narrows access under the plan; databases not included in the plan do not open through it.

2.3. Supported Assistants — the AI assistants Claude (developed by Anthropic), ChatGPT (developed by OpenAI), Grok (developed by xAI), and Hermes (an agent developed by Nous Research), to which the Connector connects using standard tools and for which the Operator ensures the Connector’s operability.

2.4. Personal account — the Service’s website section available at lk.casus.legal/account, where the User orders and pays for a subscription and manages access and automatic renewal.

2.5. Subscription — the right, provided for a fee, to unlimited access to the Connector during the subscription period.

2.6. Subscription Period — 30 (thirty) calendar days calculated from the time access is activated. An exception applies to a subscription ordered during the launch promotion for the relevant corpus: the period is calculated from the end of the promotion—for the “IP Court” connector (and the “IP Court” component of a package) 29.06.2026 09:40, for the “KAS” connector (and the KAS component of the package) 06.07.2026 09:40, for the “KUD” connector (and the “KUD” component of a package) 21.07.2026 09:40 Moscow time (see Clause 4.3).

3. Subject Matter of the Agreement

3.1. The Operator provides the User, for a fee, unlimited access to the Connector during the subscription period. Unlimited access means that there is no preset limit on the number of requests to the Service when the User personally uses the Connector in good faith (see Clauses 6.3 and 7.3). Unlimited access does not prevent the Operator from applying technical measures to protect against automated and anomalous loads, including limiting the frequency and volume of requests; such measures do not affect ordinary personal use in good faith and do not constitute a breach of the unlimited-access condition (Clause 7.5).

3.2. Under one subscription, the User may connect the Connector to one or several Supported Assistants simultaneously—Claude, ChatGPT, Grok and Hermes.

3.3. Operability Guarantee. The Operator ensures the Connector’s operability exclusively when it is connected to the Supported Assistants (Claude, ChatGPT, Grok and Hermes). The Connector’s operation in other AI assistants, clients, applications or environments is not guaranteed and is not covered by this Agreement.

3.4. The Service provides solely informational access to processed information about judicial acts. The results generated by the Service and the Connector: are not legal advice; are not a legal opinion; and may not be used as professional legal advice.

3.5. The User independently assesses the applicability of the judicial acts found to a specific legal situation, and this falls exclusively within the User’s competence and responsibility.

4. Rates and Payment Procedure

4.1. The subscription fee for each subscription period (30 calendar days) is as follows:

4.1.1. The additional databases are “IP Court,” “KAS,” “KUD” and the ten cassation district databases (13 in total); the plan price depends on their number, not their composition. Without “Higher Courts” only one additional database can be purchased.

4.2. Single-database plans provide access to the corresponding single connector or database; the “Higher Courts + N databases” and “All Courts” plans provide access to “Higher Courts” and the selected additional databases. Every set of several databases includes the “Higher Courts” connector. The User changes the package composition in the Personal Account; the change applies to the next subscription period. Subscriptions to different connectors are independent: they may be ordered, paid for and renewed separately, and each has its own period. When switching to a package, the unused balance of previously paid subscriptions included in the package is credited toward its price (recalculated proportionally to the remaining days based on the amount actually paid).

4.3. Corpus launch promotions. A subscription to the “IP Court”, “KAS” or “KUD” connector (as well as the corresponding component of the “Package” or “Maximum” plan) paid for during the launch promotion for that corpus is activated from the end of the promotion—for “IP Court” 29.06.2026 09:40, for “KAS” 06.07.2026 09:40, for “KUD” 21.07.2026 09:40 Moscow time; the subscription period is calculated from that time. A subscription that includes a cassation district database and is paid for during the district launch promotion is activated from the end of that promotion — 28.09.2026 09:40 Moscow time. Payment during the promotion does not shorten the paid period by deducting the remaining days of free access.

4.4. Payment is made in the amount of 100% of the price of the relevant period. The form and procedure for payment are determined in the Personal Account on the subscription-order page.

4.5. The Operator may unilaterally change the rates. New rates take effect upon publication and apply to subscription periods paid for after the publication date; a period paid for earlier is performed on the terms in effect on the date of payment.

4.6. The Operator notifies the User in advance of any rate change affecting the cost of the next automatic renewal, in the Personal Account and/or by another available means, before the debit date.

4.7. Trial Period. New users may be provided with free trial access to the Connector (as of the offer publication date—3 calendar days; current terms are available in the Personal Account). Trial access is provided once, requires no payment and terminates automatically upon expiry of the trial period. The good-faith-use rules and technical protection measures apply to trial access (Clauses 3.1, 6.3, 7.3 and 7.5); however, the Operator may apply stricter technical limits to trial access than to a paid subscription.

5. Subscription Term and Automatic Renewal

5.1. The subscription remains in effect for the subscription period from the time access is activated.

5.2. Automatic Renewal. The subscription renews automatically for each subsequent subscription period. Payment for the next period is charged to the linked payment method at the applicable rate (Clause 4.1) on or around the date the current period ends.

5.3. By ordering a subscription, the User consents to periodic automatic charges for subsequent periods until automatic renewal is disabled.

5.4. Disabling Automatic Renewal. The User may disable automatic renewal in the Personal Account at any time. After automatic renewal is disabled, access remains available until the end of the period already paid for, after which the subscription terminates and no further charges are made.

5.5. If an automatic renewal charge fails (insufficient funds, restrictions imposed by the bank/payment provider, etc.), the Operator may suspend access until payment is received. The Operator may make repeated attempts to charge the payment within a reasonable period.

6. Provision of Access

6.1. Access to the Connector is provided immediately after payment is confirmed through the Personal Account on the Service’s website (lk.casus.legal/account). In exceptional cases, access is provided within no more than 24 (twenty-four) hours.

6.2. Connector connection addresses: “Higher Courts”— https://mcp.casus.legal/mcp, “IP Court”— https://sip.casus.legal/mcp, “KAS”— https://kas.casus.legal/mcp, “KUD”— https://kud.casus.legal/mcp, cassation district databases — https://mcp.casus.legal/okrug/mcp, unified address for all paid databases — https://mcp.casus.legal/one/mcp. Access to each connector is opened in accordance with the paid plan. The User connects the Connector to the Supported Assistants independently, in accordance with the instructions set out in Appendix No. 1 to this offer and reproduced in the Personal Account.

6.3. Access credentials (connection credentials, keys and links) are personal. The User may not transfer them to third parties or provide third parties with access to the Service under the User’s subscription.

6.4. The Operator may unilaterally suspend access in the cases provided for in Clause 5.5 and Section 11 of this offer.

7. Rights and Obligations of the Parties

7.1. The Operator shall: provide access to the Connector in accordance with the terms of the paid subscription; take reasonable measures to ensure the operability of the Service and the Connector when connected to the Supported Assistants; notify Users of changes to the offer by publishing a new version.

7.2. The Operator does not guarantee: comprehensive coverage of case law in the Service’s database; continuous and uninterrupted operation of the Service; the Connector’s operability in assistants, clients and environments other than the Supported Assistants; the accuracy, currency and applicability of search results to the User’s specific legal situation; or the availability and proper operation of the Supported Assistants themselves and other third-party services outside the Operator’s control.

7.3. The User undertakes to: use the Service and Connector solely for lawful purposes and in accordance with the terms of the offer; use the access personally and not provide it to third parties; not carry out automated data collection (scraping), bulk downloading of content or other systematic extraction of data by methods not provided for by standard interaction through Supported assistants; not create anomalous load unrelated to bona fide personal use; and not take actions aimed at impairing the operation of the Service or circumventing its technical limitations.

7.4. “Unlimited access” (Clause 3.1) means the absence of a quantitative quota when used personally and in good faith. The actions listed in Clause 7.3 do not constitute bona fide use.

7.5. The Operator may apply technical measures to protect the Service and Connector against automated, mass and other anomalous use—including limiting the frequency and volume of requests and automatically detecting abuse—and may also immediately, including automatically and without prior notice, suspend or block access upon detecting the actions listed in Clause 7.3. Such measures do not apply to ordinary bona fide personal use and do not breach the unlimited-access condition (Clause 3.1).

8. Limitation of Liability

8.1. The Service and Connector are provided “as is” (as is). The Operator assumes no obligations to enable the User to achieve any particular results through use of the Service.

8.2. Liability for artificial intelligence errors (hallucinations). The Service uses artificial intelligence technologies that may generate results containing factual inaccuracies, nonexistent details of judicial acts or other errors attributable to the nature of language models. The Operator shall not be liable for losses incurred by the User as a result of such errors unless they resulted from intentional acts by the Operator.

8.3. The Operator shall not be liable for disruptions, unavailability or changes in the functionality of Supported assistants (Claude, ChatGPT, Grok, Hermes) or other third-party services, or for their discontinuing or changing the terms for connecting external connectors.

8.4. The Operator shall be liable to the User solely in cases of intentional distortion of the results of the Service’s operation or intentional breach of the terms of this agreement.

8.5. The Operator shall not be liable for professional, procedural, business or other decisions made by the User on the basis of the results of the Service’s operation.

8.6. The Operator’s aggregate liability to the User on any grounds arising out of this agreement is limited to the amount actually paid by the User for the current (paid) subscription period.

9. Refunds

9.1. Since access is provided immediately and used during the paid period, the cost of the current period is non-refundable if the User unilaterally cancels the subscription, except in the case provided for in Clause 9.2. To stop further charges, the User need only disable automatic renewal (Clause 5.4).

9.2. The cost of the paid period, in full or in an amount proportionate to the unused time, will be refunded if the Operator failed to ensure the Connector’s operability when connected to Supported assistants for more than 72 (seventy-two) consecutive hours for reasons attributable to the Operator, provided that the User submitted a corresponding request through the support channel. Unavailability for the reasons specified in Clauses 7.2 and 8.3 (third-party services) is not grounds for a refund.

10. Support

10.1. User support concerning the connection, payment and operation of the Connector is provided through the Service’s support chatbot, the link to which is available in the User Account.

10.2. The Operator seeks to respond to requests within a reasonable time; this offer does not establish a guaranteed response time.

11. Termination of the Agreement and Suspension of Access

11.1. At the User’s initiative: The User may disable automatic renewal in the User Account and discontinue use of the Connector at any time. Access will remain available until the end of the paid period; amounts paid for the current period are non-refundable, except in the case specified in Clause 9.2.

11.2. At the Operator’s initiative: The Operator may unilaterally suspend access or terminate the agreement and block the User’s access if the User breaches the obligations specified in Clause 7.3. If the agreement is terminated on this ground, amounts previously paid will not be refunded.

12. Personal Data

12.1. By subscribing, the User consents to the processing of their personal data to the extent necessary for performance of the agreement, in accordance with Federal Law No. 152-ФЗ of 27.07.2006 “On Personal Data”.

12.2. The categories of data processed, the purposes and the periods of processing are specified in the Privacy Policy, published on the Service’s website at www.casus.legal/privacy.html.

13. Intellectual Property

13.1. The Service, Connector, their software code, algorithms, interface, database structure and other components are intellectual property of the Operator or are lawfully used by the Operator.

13.2. Subscription entitles the User to a limited, non-transferable, revocable licence to use the Service and Connector within the limits expressly provided for by this offer, solely for personal or internal professional purposes.

13.3. Any other use of the Operator’s intellectual property—including reproduction, distribution, adaptation or public display—is permitted only with the Operator’s written consent.

13.4. The Service’s database (the corpus of processed information on judicial acts) contains more than 10 000 independent information elements. Accordingly, as its maker, the Operator holds the exclusive (related) right to extract and re-use its materials (Article 1334 of the Civil Code of the Russian Federation). The User is prohibited from extracting the database’s materials (transferring all or a substantial part of its contents to another medium) and re-using a substantial part of its materials, as well as repeatedly extracting and re-using insubstantial parts of its materials, if such actions conflict with the normal use of the database or prejudice the Operator’s legitimate interests. These restrictions apply regardless of the method of access, including when accessing the Service through the Connector and Supported assistants. A breach entails liability provided for by law and constitutes grounds for suspending and blocking access.

14. Amendments to the Agreement

14.1. The Operator may unilaterally amend the terms of the agreement. Amendments take effect upon publication of the new version and apply to subscription periods paid for after publication; a period already paid for will be performed under the terms in effect on the payment date.

14.2. If the User does not agree to the amended terms, the User may disable automatic renewal and discontinue use of the Service at the end of the paid period.

15. Final Provisions

15.1. This agreement is governed by the law of the Russian Federation.

15.2. Disputes arising out of or in connection with this agreement shall be resolved through negotiations. If no agreement is reached, the dispute shall be resolved judicially at the Operator’s location.

15.3. A court’s invalidation of any provision of this offer shall not invalidate the remaining provisions.

15.4. This offer is published on the Service’s website and is available at: mcp.casus.legal/offer-connector.

Appendix No. 1. Connector Addresses and Connection Procedure

Connector addresses for connecting to Supported assistants:

The connection procedure is the same for all connectors—the only difference is the address (URL) that you enter when creating the connector, selected from the list above. It is convenient to name the connectors after the database: CasusLegal, CasusLegal SIP, CasusLegal KAS, CasusLegal KUD. Installation in Claude and ChatGPT differs, so two separate sets of instructions are provided below. At the authorization step, use the access credentials from the User Account (after paying for the subscription).

1. Open Claude (claude.ai or the desktop application).
2. In the left sidebar, click Customize (Customize).
3. Go to the Connectors section (Connectors).
4. Click “+”, then Add custom connector (Add a custom connector).
5. Fill in the two fields using the example in the table below.

⚠️ Fill in Name and URL only. Section Advanced settings (Advanced settings) leave blank — the fields there are intended for OAuth technical parameters (client ID / client secret), and not for your login. Do not enter your Telegram username, phone number or password there: the connection will fail. The username and password are requested later, in the browser window.

6. Click Add (Add) and sign in in the authorization window using the button “Sign in via Telegram” or the password from your Personal Account.
7. CasusLegal will appear in the list of connectors with the status Connected. Done.
8. It is recommended that you set the mode for each function in the connector settings to Always allow (Always allow), so that Claude does not ask for permission again each time it accesses the database.

In ChatGPT, the user connector interface is enabled through developer mode. The sequence is as follows.

1. Open ChatGPT in a browser: https://chatgpt.com and sign in to your account.
2. Open Settings → “Security and login” and enable “Developer mode” (in the previous interface: profile → Settings → Apps & Connectors → Advanced settings → Developer mode). Without it, ChatGPT does not allow custom MCP servers to be added.
3. In the left panel, open the section “Plugins” and click «+» to the right of the search bar (in the previous interface — Create connector).
4. Enter CasusLegal in the name field.
5. (Optional) Upload the connector icon: download the CasusLegal logo, then click the icon area (Icon / icon) in the connector creation form and select the downloaded file.
6. Paste the connector address into the URL field: https://mcp.casus.legal/mcp
7. Click Create (Create) and sign in in the authorization window using the password from your Personal Account (ChatGPT does not support signing in via Telegram).
8. Open a new chat, click “+” → More (More), and select CasusLegal.

In Grok, custom MCP servers can be added without enabling additional modes.

1. Open Grok in a browser: https://grok.com and sign in to your account.
2. In the left panel, open the section “Skills and connectors”.
3. Go to the tab “Connectors” and click “New connector”.
4. Select “Custom settings” (“Add your own custom connector”).
5. In the name field, enter the following in Latin characters: CasusLegal.
6. Paste the connector address into the server URL field: https://mcp.casus.legal/mcp
7. Click “Add connector” and, in the authorization window, sign in via Telegram or using the password from your Personal Account.
8. In the chat, click “+” → “Connectors” and switch on the toggle next to the required database.

Hermes is an agent developed by Nous Research; it is installed as a desktop application or terminal program (hermes-agent.nousresearch.com).

1. In the Hermes left-hand menu, open Skills, then go to the MCP and click New Server.
2. In the editor that opens mcp.json add a server with a name in Latin characters casuslegal, an address https://mcp.casus.legal/mcp and authentication "auth": "oauth".
3. Click Save and switch on the toggle next to the server; when the status is Needs authentication select the server and click Authenticate.
4. On the CasusLegal sign-in page that opens, sign in via Telegram or using the password from your Personal Account.
5. Start a new dialogue—the connector tools will appear in the server card.

Current step-by-step instructions with screenshots for each environment: casus.legal/connector/connect.html. They are also duplicated in your Personal Account.