The GST Card Exchange · Mint
The Custodian's desk.
This is Dad's tool. Load your custodian key, choose a card, set the edition and the friend who will hold it, and mint a signed certificate. The signature proves it came from you — and anyone can verify it without your key.
1 · Load your custodian key
Your private key never leaves this browser. Keep the key file somewhere safe — it is what makes a card real.
No custodian key loaded.
2 · Choose the card & edition
Custody rule. Only The Custodian mints. Paper points are for learning, never money; cards are never sold. A minted certificate is a fan-tribute collectible for the family circle.
Certificate preview
The signed certificate is embedded inside the PNG image, so the picture is the proof. Send the PNG to your friend; they can hold it and verify it on the Verify page.