Last updated: April 1, 2026
These Terms of Service (hereinafter "Terms") govern the contractual relationship between the OneBrain project (hereinafter "Provider") and the user (hereinafter "User" or "you") of the OneBrain service (hereinafter "Service"). The Service comprises an AI memory layer for structured storage and delivery of user knowledge to AI assistants. By registering and creating an account, you agree to these Terms. Deviating or supplementary terms of the User shall not become part of the contract unless the Provider expressly agrees in writing.
"Service": The OneBrain platform including web app, REST API, MCP server, SDKs, and associated documentation. "User": Any natural or legal person who creates an account and uses the Service. "Agent": An automated software system (AI agent) that accesses the Service via the API. "Brain": The entirety of stored memories, entities, projects, and profile information of a User. "API Key": A machine-readable access token with defined permissions (scopes) for programmatic access. "Memory Data": Content entered by the User or generated by AI extraction (memories, entities, projects, brain profile).
Use of the Service requires the creation of a user account. You must provide truthful information during registration. Each natural person may maintain only one account. The minimum age for use is 16 years. You are obligated to keep your access credentials (password, API keys, TOTP secret) confidential and protect them from third-party access. You are liable for all activities conducted through your account unless you are not responsible for the unauthorized use. In case of suspected abuse, you are obligated to notify us immediately.
AI agents can create accounts automatically via the provisioning endpoint. The same Terms apply to each agent account. The operator of the agent (the person or organization using the provisioning key) is responsible for the agent's actions, including stored content and compliance with these Terms. Only one account per agent name is permitted.
You may use the Service exclusively for lawful purposes and in accordance with these Terms. You agree not to use the Service for storing, processing, or distributing content that violates applicable law.
The following are expressly prohibited: - Storage of illegal, glorifying violence, discriminatory, or pornographic content - Infringement of copyrights, trademark rights, or other rights of third parties - Attempts to impair the security, integrity, or availability of the Service (including DDoS, injection, reverse engineering) - Automated scanning or scraping beyond documented API limits - Resale or sublicensing of access without written permission - Use of the Service for spam, phishing, or social engineering - Circumvention of rate limits, authentication mechanisms, or access restrictions
The Service, including source code, design, documentation, and trademarks, is the intellectual property of the Provider and is available under an open-source license (as published on GitHub). Your memory data remains your property. You grant the Provider a simple, temporally and spatially unlimited right of use to your data insofar as this is necessary for providing the Service (storage, processing, delivery via the API). Your data will not be used beyond service provision.
The protection of your personal data is of central concern to us. For details, please refer to our Privacy Policy at https://onebrain.rocks/datenschutz. The Privacy Policy is an integral part of these Terms.
The Provider endeavors to ensure high availability of the Service but does not guarantee a specific availability rate unless agreed upon in a separate Service Level Agreement (SLA). Maintenance work, updates, and security patches may lead to temporary restrictions. The Provider will inform about planned maintenance in advance where possible. The Provider is not liable for outages caused by force majeure, third-party disruptions, or network issues.
The Service is offered in a free basic plan and paid plans. Current prices and features are available on the pricing page (https://onebrain.rocks/pricing). Paid plans are billed monthly or annually in advance. Payment is processed exclusively through Stripe Inc. The Provider does not issue invoices directly; invoicing is handled through Stripe. All prices include statutory VAT where applicable.
You may cancel paid plans at any time effective at the end of the current billing period. After cancellation, access remains until the end of the paid period, after which the account is automatically downgraded to the free plan. No pro-rata refund of amounts already paid for the current period will be made unless the Provider has materially and persistently failed to perform the Service in accordance with the contract.
API keys are confidential access credentials and must be treated like passwords. The full key is displayed only once upon creation and cannot be retrieved thereafter. You are obligated to immediately revoke compromised keys. The Provider is not liable for damages arising from the misuse of disclosed API keys. API keys can be created with expiration dates and scope restrictions. Compliance with rate limits is mandatory.
You may delete your account at any time without giving reasons via account settings or by emailing legal@onebrain.rocks. After deletion, all your personal data and memory data will be irrevocably deleted within 30 days, unless statutory retention obligations apply.
The Provider is entitled to temporarily suspend or permanently terminate accounts in case of violation of these Terms. In case of serious violations (particularly Section 4.1), termination without prior warning is permissible. The Provider will inform the User of the reasons for suspension or termination insofar as legally permissible.
The Provider is liable without limitation for damages arising from injury to life, body, or health, as well as for intentional misconduct and gross negligence. For slight negligence, the Provider is liable only in case of breach of material contractual obligations (cardinal obligations); in this case, liability is limited to foreseeable, contract-typical damages.
The Provider's liability for slight negligence in breach of material contractual obligations is limited to the amount the User has paid to the Provider in the last 12 months, but not less than EUR 100. Liability for indirect damages, consequential damages, lost profits, data loss, or damages from unavailability of the Service is excluded for slight negligence to the extent permitted by law. The Service is provided "as is". The Provider does not guarantee uninterrupted, error-free, or complete availability of the Service.
The User shall indemnify and hold harmless the Provider from all third-party claims arising from unlawful use of the Service by the User or from content stored by the User. This includes reasonable costs of legal defense.
The Provider shall not be liable for non-performance or delayed performance of its obligations insofar as attributable to circumstances beyond its reasonable control (force majeure), including natural disasters, war, terrorism, pandemics, strikes, governmental orders, failures of telecommunications networks, or energy providers.
The Provider reserves the right to amend these Terms with reasonable notice. Changes will be communicated to the User by email or through a notice in the Service at least 30 days before taking effect. If the User does not object to the changes within the notice period and continues to use the Service, the new Terms shall be deemed accepted. The right to object will be expressly stated in the change notification.
Should any provision of these Terms be or become invalid or unenforceable, the validity of the remaining provisions shall not be affected. In place of the invalid or unenforceable provision, that valid and enforceable provision shall apply which comes closest to the economic purpose of the invalid provision.
These Terms are governed by the laws of the Federal Republic of Germany, excluding the UN Convention on Contracts for the International Sale of Goods (CISG). For disputes arising from or in connection with these Terms, the Provider's registered office shall be the exclusive place of jurisdiction, to the extent permitted by law. For consumers, the mandatory provisions of consumer law of their state of residence shall apply insofar as they are more favorable.