A wallet built for AI agents
Every agent gets its own spend-capped sub-wallet over MCP and can buy what it needs from any platform that runs on GG-Coin — the first money rail built for software that spends on its own.
Agent wallets · Gaming
Money your AI agents can spend — with your approval.
GG-Coin gives every AI agent a spend-capped wallet it can use to buy what it needs from any platform that runs on GG-Coin. When an agent goes to pay, you confirm it with one tap on your phone — like 3D Secure, but for agents.
An agent's 500 GG charge pauses over its spend limit, a push notification lands on the owner's phone, one biometric tap approves it, and the ledger records the double entry.
One closed-loop coin, two markets — agent wallets and gaming. A virtual-goods currency with a developer-first SDK and a native agent layer; not a crypto token, not a gift card, not a payment processor.
Built for the places your users already are
SDKsJavaScriptLuaJavaPythonC#PHPGo
PlatformsFiveMGarry's ModMinecraftUnityWeb & backendMCP agents
You approve every payment
Like 3D Secure, but for agents: when an agent goes to pay, you get a push on your phone and confirm with one tap. Nothing moves without you — strong authentication and near-zero chargebacks.
Game and creator economies
Games and creator platforms get a real wallet, an SDK, and a payout-free coin economy in an afternoon — one integration, any country.
One wallet, four moves
The whole lifecycle — from funding to an auditable ledger — in the order it happens.
Buy coin into your master wallet
Fiat in, coin out. Integer-exact amounts on a real ledger from the first entry.
Master wallet12,500 GG
checkout purchase+2,000 GG
Give each agent a capped sub-wallet
Its MCP token is bound to that wallet alone — a leaked token can never drain the master. Caps and velocity checks are enforced server-side.
agent-7cap 500 GG / day
mcp_tok_•••7f2scoped
Over the threshold, you decide
Small spends clear on their own inside the limits you set. Bigger ones pause and push to your phone — one biometric tap releases them, or you decline.
platform-y : api-credits500 GG
one-tap biometricapproved
Every move on the ledger
Append-only, double-entry. Nothing is edited in place — corrections net to zero, so history stays honest.
debit agent-7500
credit platform-y500
net0
Give your first agent a wallet in an afternoon.
Start buildingBuilt like money infrastructure
No adoption theater — the guarantees a payment integration is supposed to ship with.
Append-only double-entry ledger
Balances are derived, never edited in place. Corrections are new entries that net to zero, so history stays auditable.
Read the docs →Mandatory 2FA
TOTP on every account, owner and operator alike. No opt-out.
Read the docs →HMAC-signed webhooks
Timestamp + nonce on every event, retried with backoff. Verify the signature, trust the event.
Read the docs →Server-side spend caps
Hard caps and velocity checks enforced on the server — never on the client.
Read the docs →Sub-wallet-scoped MCP tokens
Each agent token is bound to one sub-wallet. A compromise leaks a wallet, never the master.
Read the docs →Built for developers first
Grab an API key and drop in an SDK: mint and move coin with integer-exact amounts, and let the double-entry ledger keep every balance honest. HMAC-signed webhooks, server-side spend limits, and 2FA come standard.
import { GGCoin } from "@developerz.ai/ggcoin-sdk";
const gg = new GGCoin({ apiKey: process.env.GGCOIN_KEY });
// An agent buys API credits from another platform. Above the
// owner's limit, the charge waits for a one-tap phone approval.
await gg.transactions.post({
subWallet: agent.walletId,
amount: 500n,
memo: "platform-y:api-credits",
});Go deeper
The thinking behind the coin, and the fastest paths into it.
Thesis
Why a closed-loop coin, and why now
Gaming, AI, and the agent economy on one rail — the core concepts behind the product.
Read the concepts →AgentsThe agent guide
Give an agent a wallet over MCP: sub-wallets, caps, and the approval loop.
Read the guide →QuickstartSDK quickstarts
From API key to first charge, in seven languages.
Pick a language →Questions, answered
What is a closed-loop currency?
Fiat goes in, coin comes out, and the coin is spent inside integrated platforms. It only ever flows one way: in. That keeps GG-Coin a virtual good — in the Robux and V-Bucks lineage — not a money service.
Is GG-Coin a crypto token?
No. There is no chain, no speculation, no exchange listing. GG-Coin is a virtual-goods currency on an append-only double-entry ledger, with mandatory 2FA on every account.
How do agent approvals work?
Each agent charges its own spend-capped sub-wallet. Below your threshold it transacts on its own; above it, the charge pauses and pushes to your phone, where one biometric tap releases it — or you decline.
Which platforms and SDKs are supported?
SDKs for JavaScript, Lua, Java, Python, C#, PHP, and Go — covering FiveM, Garry's Mod, Minecraft, Unity, and web or backend stacks — plus a native MCP layer for AI agents.
How do I start building?
Grab a sandbox key at labs.ggcoin.ai. Sandbox mirrors production, so you can build and test the entire flow — wallets, charges, approvals, and webhooks — before you go live.
Put a wallet in your agent's hands.
Sandbox keys mirror production — build the whole flow before you go live.
Running a game or creator platform? See use cases