The non-custodial USDC cashier for fantasy, contest, and sweepstakes operators. Players deposit to an address that is theirs, the money lands in your treasury, and every payout leaves from a wallet only you hold. Cage keeps the books, screens the wallets, and tells your backend what happened.
Every operator gets a portal. Approve payouts, sweep deposits into the treasury, and watch the books balance against the chain.
Three moves, and the money is never anywhere but a player's own address or your treasury. Cage watches the chain and does the checking. Your wallet does the signing.
Your backend asks Cage for the player's address and shows it. The player sends USDC from any wallet or exchange. Cage sees it land, re-reads the transfer from the chain, screens the sender, and tells your backend to credit the balance.
Player addresses are small contracts with one power: forward to your treasury. Press Sweep in the portal and one transaction moves everything in. Not to us, not to an attacker, not to anyone else.
Your backend asks for a payout. Cage screens the destination and queues it, and your wallet signs it from the portal. It counts as paid when the chain confirms it arrived, not when the wallet says so.
If anything does not match, the money waits. A stale sanctions list, a node that will not answer, or a transfer that does not match the chain all stop the flow. Cage never guesses.
The details that matter once the first real deposit lands.
There is no key on the server. Cage cannot move a cent, and neither can anyone who breaks into it.
Every deposit is re-read from the chain: right token, real transaction, enough confirmations. Large deposits wait for finality.
Every sending and receiving wallet is checked against the OFAC list, refreshed nightly. A match is held. It is never credited and never paid.
A deposit cannot be credited twice and a withdrawal cannot be paid twice. The database itself refuses.
Ledger against chain, to the unit, on demand. One number tells you everything is accounted for.
Your backend hears about every deposit and payout, signed so it can trust the message. Test it from the portal before any money moves.
Switch off the states where USDC funding is not allowed. Massachusetts is off by default. Plugs straight into Entry Check.
We run it, or you do. Same code, same portal, same nightly screening.
PHP and Node clients, plus a complete webhook receiver with signature checks and once-only crediting built in.
Custody is the main question with crypto. Here is the plain answer for every dollar that moves through Cage.
A contract with one power: send to your treasury. It cannot pay anyone else, and the address is the player's for good.
Every deposit ends up here. Your wallet, or a Safe multisig. Fixed in the contract on day one and never changed.
Cage builds the transaction. A person approves it in a wallet you hold. Nothing leaves the treasury any other way.
The addresses, the watching, the screening, the books, and the messages to your backend. Never the money.
Sign in and your cashier is in front of you. Approve what is waiting, press Pay all, press Sweep, and open the books. Appently sees the same screen when you need a hand.
Operator sign in →Your balance ledger stays yours. Cage tells you what arrived and what left. A developer wires it in a day or two with the drop-in clients.
Ask for the player's address and show it with a QR code and three facts: USDC, on Base, and the minimum amount.
Credit on deposit, close on payout. Signature checked, and each event applied once.
Hold the balance, ask Cage, show the status. A retry can never pay twice.
Approve, pay, sweep, and check the books. Nothing to build.
A bearer key, JSON in, JSON out. Amounts come as decimal strings and as whole units, so nothing is ever rounded.
# POST /v1/deposit-address, from your server { "player_id": "player-1", "ip": "152.2.10.1" } # 200 { "allowed": true, "address": "0x4B2c…9aF1", "chain": "Base", "token": "USDC", "min_deposit": "1.00" }
# POST /v1/payouts. request_id is yours; a retry returns the same payout. { "request_id": "wd-1001", "player_id": "player-1", "to": "0x8fA3…c02D", "amount": "100.00" } # 201 { "accepted": true, "payout": { "id": "pay_7c…", "status": "approved" } } # Then, on your webhook "type": "payout.confirmed" # the chain shows it arrived
Full docs, every event type, and the drop-in clients are on the portal's Integration page.
Crypto processors take 0.5% to 2% of every deposit and hold your money while they do it. Card processors take more and keep a reserve for months. Cage is a flat monthly rate, the money is never in anyone's hands but yours, and you can buy the license outright and pay nothing after.
One-time, on the monthly plans
For one brand getting started
For operators with real volume
Own it. Nothing monthly.
Higher volumes and additional brands are quoted. Network fees are pennies and are paid by the wallet that sends. On the monthly plans, pay annually and get twelve months for the price of ten. Prices in U.S. dollars.
Your stack, your treasury, your states. Tell us your stack and your treasury wallet, and you will have a portal login and an API key this week. Send a note, or book a call and we will walk through it together.
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