A secure file-sharing skill that generates tokenized, self-destructing public download links using a local server and Cloudflare Tunnel.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install share-onetime-link
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install share-onetime-link using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Share One-Time Link?
The Share One-Time Link skill enables users to expose local files to the public internet securely and temporarily. By leveraging Openclaw Skills, this tool automates the process of moving files to a designated sharing directory, generating a cryptographically random token, and serving the file via a local Express server. To ensure global accessibility without complex network configuration, it integrates with Cloudflare Tunnels, providing a public URL that bypasses the need for a VPN or static IP while maintaining a strict security posture.
Share One-Time Link Use Cases
- Sending large reports or assets to external clients without using third-party cloud storage providers.
- Sharing temporary debugging logs or build artifacts with teammates quickly.
- Providing a one-time download link for sensitive documents that should self-destruct immediately after access.
- Distributing files from a local development environment to mobile devices for testing without internal network hurdles.
How Share One-Time Link Works
- The user requests a file share via the agent or CLI, specifying an optional time-to-live (TTL).
- The skill copies the target file to an isolated shared directory to prevent unauthorized access to the rest of the workspace.
- A unique, 64-character hex token is generated and associated with the file metadata.
- The local Express server tracks the link and serves the file through the Cloudflare Tunnel.
- Upon the first successful download or the expiration of the TTL, the server automatically deletes the file and invalidates the token.
Share One-Time Link Setup
1. Install Dependencies
cd skills/share-onetime-link/scripts
npm install
2. Configure Cloudflare Tunnel
Create a tunnel in your Cloudflare dashboard pointing to http://localhost:5050 and run it:
cloudflared tunnel run --token YOUR_TUNNEL_TOKEN
3. Start the Server
Configure your environment variables and launch the service:
SHARE_PUBLIC_URL="https://share.yourdomain.com" \
SHARE_SECRET="your-strong-random-secret" \
node skills/share-onetime-link/scripts/server.js
Share One-Time Link Data Schema & Taxonomy
| Component | Description |
|---|---|
| Shared Directory | workspace/shared/ - A dedicated, isolated folder for temporary files. |
| Access Tokens | 32-byte (64 hex chars) cryptographically random strings used for unique URLs. |
| Metadata | Internal server tracking of file paths, token associations, and expiry timestamps. |
Share One-Time Link Advanced Features
- Automated cleanup logic that triggers on both event-based (download) and time-based (TTL) conditions to ensure no data lingers.
- Secret-protected administrative endpoints (
/generateand/status) that require a SHARE_SECRET for authorized management. - Deep integration with Openclaw Skills allowing for natural language commands like "Share this for 10 minutes".
- Security-first design that refuses to start the server if a secret is not provided, ensuring all sharing is authenticated.
SKILL.md
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