JellyCoin.
A small, honest coin with one unusual rule: every single coin has to be mined by a real GPU. No faucet, no mint button, and deliberately no CPU mining.
It is play money for a workshop and an art registry — and it is not for sale.
🚫 No CPU mining, by rule
👥 Humans approve everything
📜 Open white paper
JellyCoin is not an investment.
It has no price, no exchange listing, and no promise of value. You cannot buy it here. Nobody is raising money with it. It is not a security, not a store of real-world value, and not a thing to speculate on.
It exists so that a hobby workshop’s hardware, artwork and software workers have something to trade in. If that sounds like a toy economy — good, that’s exactly what it is, and we’d rather say so on the front page than bury it.
What JellyCoin actually is
One machine keeps the ledger. Any graphics card in the world can compete to mine the next block. That’s the whole idea.
Real work, real scarcity
New coins only appear when a GPU actually solves a block — electricity through silicon. There is no way to conjure supply out of a database.
A second life for old cards
The proof-of-work runs on just about any OpenCL graphics card. Hardware too old for modern AI work is still a first-class miner here.
No CPU mining, ever
Botnets, cloud burst instances and “just run it on the server” shortcuts are all CPU-shaped. Excluding CPUs keeps issuance tied to hardware people really own.
One authority node
A single node keeps the ledger and verifies the work — and we say so plainly. It is not decentralised and it isn’t pretending to be.
Checkable by anyone
Every coin traces back to a block whose header hashes below its recorded target. Given the block list, anyone can re-verify the whole chain with a few lines of code.
Art, agents & compute
JLY pays for artwork registered to its own content hash and meters shared compute between friendly nodes.
Chain facts at publication
A fixed snapshot, written down honestly rather than piped in from a live ticker.
Recorded 20 July 2026. These numbers are static text and will drift — there is no live feed on this page, on purpose. Of the supply above, 1,000,000 JLY was the founding float; the rest has been mined block by block.
Four steps, no mystery
The same shape as any proof-of-work coin, just smaller and more honest about its scale.
Ask for work
A miner requests a job from the node and receives a block header to solve, plus the difficulty target it has to beat.
Hash on the GPU
The card grinds through candidate values looking for a hash that lands below the target. This is the part that costs real electricity.
Submit the proof
A winning value goes back to the node, which re-verifies the whole thing at full precision before it believes a word of it.
Get paid
A valid block mints its reward to the rig’s wallet and extends the chain. Jobs are single-use and expire quickly, so old work can’t be replayed.
✅ What JellyCoin is not
So nobody has to guess:
- Not decentralised, and not pretending to be
- Not an investment, a security, or a store of real value
- Not for sale by software — a human approves every outward action
- Not mineable by CPU, botnet, or API shortcut
- Not raising funds, and not listed anywhere
The white paper says all of this too, in more detail.
Papers & source code
The specification is public so anyone can check the claims on this page — or build their own miner.
📜 The white paper
Design goals, the authority-node trade-off stated bluntly, the full proof-of-work specification, the token economy, and a plain list of what the coin is not.
🔑 Security & protocols
How the ledger stays honest: single-use work, server-side re-verification, encrypted rig credentials, scheduled backups, and an openly stated blast radius.
jellycoin-core is open source
The authority-node core — ledger plus proof-of-work validation, standalone with no infrastructure dependencies — is published in full. Read it, audit it, or lift the proof-of-work spec for something of your own.
Small coin, open code.
Everything on this page is checkable — the core, the white paper and the proof-of-work spec are all public.