Flashpaper: Open-Source Tool Sends Self-Destructing Secrets With No Database

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A Bangkok-based developer named Min has launched Flashpaper, an open-source secret-sharing tool that automatically destroys messages after they are read or within 24 hours. The tool stores data in RAM only, with no database, keeping it lightweight and low-cost to run. Encryption is handled entirely in the browser using a zero-knowledge approach, meaning the server never sees the decryption key during the standard web flow. Flashpaper also offers a REST API and MCP server for AI agents to create one-time-claim secret links, though the developer acknowledges this API flow is not zero-knowledge. The project is MIT-licensed and available on GitHub, with an honorware policy for enterprise self-hosting.

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