Terms of Service

DencyuSystems (a sole proprietorship; hereinafter the "Operator") hereby establishes these Terms of Service (hereinafter the "Terms") governing the conditions of use of the review web service "Relaynote" (https://relaynote.dev ; hereinafter the "Service"). Persons who use the Service (hereinafter "Users") shall use the Service only after agreeing to the Terms.

Article 1 (Definitions)

In the Terms, the following terms shall have the following meanings.

1. Service — the web service provided by the Operator under the name "Relaynote", together with the API, MCP server, and related tools incidental thereto.
2. User — a person who registers an account with the Service and uses it.
3. AI Client — an AI agent that a User connects to the Service, together with its execution environment (such as a coding agent or a CLI tool).
4. Session — a unit of records of reports, screenshots, comments, and decisions created on the Service by a User or by a User's AI Client.
5. Posted Content — text, images, entries in forms and tables, comments, decisions such as approvals and requests for changes, and any and all other information registered in a Session.

Article 2 (Agreement to the Terms)

1. A User shall be deemed to have agreed to the Terms at the time the User begins using the Service.
2. Individual notices and guidelines posted by the Operator on the Service shall constitute a part of the Terms.
3. A minor shall use the Service only after obtaining the consent of a person with parental authority or another statutory representative. Persons under 13 years of age may not use the Service.

Article 3 (Accounts)

1. Registration of an account requires login with a Google account or a GitHub account. The Operator does not hold passwords.
2. An account shall be used by the User personally and may not be lent, shared, or transferred to a third party.
3. A User shall manage the User's own account, API keys, and AI Clients connected to the Service at the User's own responsibility. Operations performed using them shall be deemed operations performed by the User.
4. If there is a possibility that an API key has been leaked, please promptly revoke that key from the settings screen.
5. An account may be deleted at any time from the settings screen. The effect of deletion shall be governed by Article 10 and by the Privacy Policy.

Article 4 (Connection of AI Clients)

1. A User may connect an AI Client to the Service by connecting via OAuth or by issuing an API key.
2. Posted Content registered with the Service by an AI Client shall be treated as having been registered by the User personally. Please verify the output of an AI Client at the User's own responsibility.
3. The Operator may set upper limits on the frequency and volume of requests in order to provide the Service in a stable manner.

Article 5 (Prohibited Acts)

In using the Service, a User shall not engage in any of the following acts.

1. Acts that violate laws and regulations or public order and morals
2. Acts that infringe the copyrights, trademark rights, privacy, reputation, or other rights or interests of a third party
3. Acts of registering information obtained without authorization, malware, or other unlawful or harmful information
4. Acts of using the Service for purposes other than review, and in particular as a means of general hosting, distribution, or storage of images or files
5. Acts that impose an excessive load on the Service, mass access to or collection of information by automated means, or attempts to circumvent usage limits
6. Acts of reverse engineering, decompiling, disassembling, or otherwise analyzing the Service (except where permitted by law)
7. Unauthorized access, exploitation of vulnerabilities, or other attempts to view or write to Sessions without authorization
8. Acts of impersonating the Operator or a third party
9. Any other act that the Operator determines to be inappropriate on reasonable grounds

Article 6 (Posted Content)

1. Copyrights and other rights in Posted Content shall remain with the User or the rightful holder. The Operator does not acquire such rights.
2. A User grants the Operator permission to use Posted Content solely to the extent necessary for the provision, maintenance, and improvement of the Service (including storage, reproduction, display on screen, distribution via share links, incident response, and backup). The Operator shall not use Posted Content beyond this scope and shall not provide it to third parties for advertising or other purposes.
3. A User warrants that the User holds the lawful right to register the Posted Content with the Service.
4. The Operator shall not be obligated to monitor the content of Posted Content at all times.

Article 7 (Share Links and Access)

1. The access setting of a Session shall be selected by the User. If a setting that allows viewing by any person who knows the URL is selected, a person who receives that URL may view the content without logging in to the Service.
2. The User shall determine, at the User's own responsibility, to whom share links and Session passwords are given. The User shall bear the consequences arising from viewing, comments, and decisions by persons with whom the User has shared them.
3. Content entered by a third party through a share link may be delivered to the User's AI Client. The User shall verify such content before handling it.

Article 8 (Provision of the Service)

1. The Operator shall make reasonable efforts to provide the Service in a stable manner but does not guarantee any level of availability (there is no SLA).
2. The Operator may temporarily suspend all or part of the Service without prior notice due to maintenance, failures, suspension of external services, or other causes.
3. The Operator may change the content of the Service or terminate the provision of all or part of it. As a general rule, the Operator shall give notice of material changes affecting paid plans and of termination of provision at least 30 days in advance, on the Service or by email.
4. Sessions and attached images shall be deleted automatically after the retention selected by the User has elapsed. Deleted data cannot be restored, so please save any records you require yourself.

Article 9 (Pricing Plans)

The Service offers a free plan (Free) and a paid plan (Pro). The features and limits available under each plan are as displayed on the Service. The content and limits of the free plan may be changed at the Operator's discretion.

The fees for the paid plan are as follows. Prices in Japanese yen include tax; prices in US dollars exclude tax.

1. The method of payment shall be credit card payment through the payment services of Stripe, Inc. The Operator does not retain card numbers.
2. Fees shall be charged at the time of subscription and shall thereafter renew automatically on the same cycle.
3. Cancellation may be performed at any time from the billing management screen (customer portal). Cancellation takes effect on the last day of the current contract period, and the features of the paid plan remain available until then.
4. Even if a User cancels during a contract period, fees corresponding to the unused portion of the period shall not be refunded. This shall not apply, however, where a refund is required by law.
5. If fees are to be changed, notice shall be given at least 30 days in advance, on the Service or by email. The revised fees shall apply to renewals occurring on or after the date specified in the notice.

Article 10 (Suspension and Termination of Use)

1. If a User violates the Terms, the Operator may, without prior notice, take measures such as making Sessions private, restricting features, or suspending or deleting the account.
2. Even if a User suffers damage as a result of the measures set forth in the preceding paragraph, the Operator shall not be liable for compensation therefor. This shall not apply, however, in cases of the Operator's willful misconduct or gross negligence.
3. Where a User deletes an account, and where the Operator deletes an account, all data including Posted Content shall be deleted and cannot be restored. Even if an account is deleted while a paid plan is in effect, fees for the unused portion of the period shall not be refunded.

Article 11 (Scope of Warranty)

1. The Operator does not warrant that the Service will be fit for any particular purpose of the User, that expected results will be obtained, that there will be no errors or defects, or that the Service will be available without interruption.
2. The Service displays and stores the output of AI agents, but the Operator does not warrant the accuracy, legality, or usefulness of such content.
3. AI Clients connected to the Service, destinations registered by a User, and other third-party services are not within the Operator's control.

Article 12 (Limitation of Liability)

1. Even where the Operator compensates a User for damage arising in connection with the Service, the amount of compensation shall be limited to the total amount of fees for the Service paid by the User to the Operator during the 12 months preceding the occurrence of the damage.
2. The Operator shall not be liable for lost profits, lost business opportunities, loss of data, or other indirect or special damages.
3. The preceding two paragraphs shall not apply to damage caused by the Operator's willful misconduct or gross negligence.
4. Where a User is a consumer as defined under the Consumer Contract Act, any provision of the Terms that exempts or unreasonably limits the Operator's liability shall apply only to the extent that it does not conflict with that Act or other mandatory laws.

Article 13 (Handling of Personal Information)

The handling of Users' personal information shall be governed by the separately established Privacy Policy (https://relaynote.dev/privacy ).

Article 14 (Changes to the Terms)

1. The Operator may change the Terms.
2. In making a change, the Operator shall give notice of the revised content and the effective date by posting it on the Service. Where a material change disadvantageous to Users is made, notice shall be given at least 30 days before the effective date.
3. If a User uses the Service on or after the effective date, the User shall be deemed to have agreed to the revised Terms.

Article 15 (Partial Invalidity and Assignment of Rights and Obligations)

1. Even if any provision of the Terms is held invalid or unenforceable, the remaining provisions shall remain in full force and effect.
2. A User may not assign to a third party the User's status under the Terms or any rights or obligations arising under the Terms without the prior written consent of the Operator.

Article 16 (Governing Law and Jurisdiction)

1. The Terms and the use of the Service shall be governed by the laws of Japan.
2. The Tokyo District Court shall have exclusive jurisdiction as the court of first instance over any dispute arising between the Operator and a User in connection with the Service.

Article 17 (Contact)

Please direct inquiries regarding the Terms to support@dencyu-systems.com. The Operator's address and telephone number will be disclosed without delay upon request.

---

• Business operator: DencyuSystems (sole proprietor: Takumi Tanaka)
• Effective date: September 9, 2026