Terms and conditions
Updated
These terms describe how you may use Once. By using the service, you agree to these terms and acknowledge the privacy policy.
What the service does
Once lets you create a personalized, encrypted letter and share a link for one successful retrieval. Password protection is optional. An unused link expires after the period selected by its sender, unless the sender chooses Never expires. Use the service only where you are permitted to do so under applicable law.
Your responsibilities
You are responsible for the content you send, having permission to share it, choosing recipients carefully, and protecting message links and passwords. Do not use Once for unlawful content, threats, harassment, fraud, distributing malware, or infringing another person’s rights. Do not attack the service, bypass access controls, or use automation that disrupts availability.
Do not rely on Once for emergency communication, your only copy of important information, or information whose loss or disclosure could cause serious harm. A message can be consumed by anyone who obtains the necessary link and password before the intended recipient.
One view and its limits
One view means one successful server retrieval, not protection against copying. A recipient can save, photograph, copy, or record what they see. Closing or refreshing a revealed message can make it inaccessible. A network interruption after the server deletes a record may prevent the recipient from seeing the message at all.
Lost links, passwords, expired messages, and consumed messages cannot be recovered through the application. There is no guarantee of delivery or of a recipient’s identity. Encryption does not protect against a compromised device, browser, or someone who has the complete link and any required password.
Availability and cost
Once is currently offered without a service charge. Availability depends on hosting-provider limits and operational capacity. The maintainer may limit, change, suspend, or discontinue the service, including to address abuse or security problems. There is no service-level or uptime commitment.
Service limitations
The service is provided as available, without a promise that it will always be uninterrupted, error-free, or suitable for a particular purpose. To the extent permitted by applicable law, the maintainer is not responsible for losses resulting from reliance on the service, failed delivery, loss of access, or recipient actions. Nothing in these terms excludes rights or liabilities that cannot legally be excluded.
Other providers and source code
Cloudflare and, on the separate ChatGPT Sites deployment, OpenAI provide hosting infrastructure. Their own terms and policies govern their services. The public source repository describes the software; publishing source code does not grant ownership of anyone’s private messages. Any software license must be read from the repository itself.
Updates and contact
The maintainer may update these terms, with the latest version and date published here. Use after an update is subject to the updated terms where permitted by applicable law. Raise service questions through the repository issue tracker, without publishing private content or complete message links.