modbender Secret Portal
Spin up a temporary, one-time-use web UI for securely entering secret keys and environment variables. No secrets ever touch chat history or terminal logs.
Quick Start
# Single key with cloudflared tunnel (recommended)
uv run --with secret-portal secret-portal \
-k API_KEY_NAME \
-f ~/.secrets/target-env-file \
--tunnel cloudflared
# With guided instructions and a link to the key's console
uv run --with secret-portal secret-portal \
-k OPENAI_API_KEY \
-f ~/.env \
-i '<strong>Get your key:</strong><ol><li>Go to platform.openai.com</li><li>Click API Keys</li><li>Create new key</li></ol>' \
-l "https://platform.openai.com/api-keys" \
--link-text "Open OpenAI dashboard →" \
--tunnel cloudflared
# Multi-key mode (no -k flag, user enters key names and values)
uv run --with secret-portal secret-portal \
-f ~/.secrets/keys.env \
--tunnel cloudflared
Options
| Flag | Description |
|---|---|
-k, --key |
Pre-populate a single key name (user only enters the value) |
-f, --env-file |
Path to save secrets to (default: ~/.env) |
-i, --instructions |
HTML instructions shown above the input field |
-l, --link |
URL button for where to get/create the key |
--link-text |
Label for the link button (default: "Open console →") |
--tunnel |
cloudflared (recommended), ngrok, or none |
-p, --port |
Port to bind to (default: random) |
--timeout |
Seconds before auto-shutdown (default: 300) |
Tunneling
Use --tunnel cloudflared — it's free, requires no account, has no interstitial pages, provides HTTPS, and auto-downloads the binary if missing.
ngrok free tier shows an interstitial warning page that blocks mobile and automated use.
Without a tunnel, the port must be open in your firewall/security group. The CLI will warn you if it detects the port is unreachable.
Security
- One-time use: portal expires after a single submission
- Token auth: URL contains a random 32-byte token
- Secret values are never printed to stdout/stderr (enforced by tests)
- Env file is written with
600permissions (owner-only) - Secrets never touch chat history or terminal logs