Case · Open on Arc Mainnet
Ryntra Guard
Stablecoin operations for teams on Arc
The problem
Teams that pay in stablecoins need one way of paying: checked before the wallet signs, proven after Arc settles — without handing their keys or funds to anyone.
The approach
- Request: who is paid, how much, in which stablecoin, on Arc — or a link the payer opens and pays
- Check: the network, the recipient against sanctions lists, the balance and the fee — with a reason when it stops a payment
- Approve: your own wallet approves the exact payment — change the amount or the recipient and it no longer applies
- Settle: Arc settles it, and Ryntra reads the chain back to match what settled to what was approved
- Receipt: every payment closes with a sealed receipt anyone can re-check against Arc, without trusting Ryntra
Who it's for
- Teams paying contractors from their own wallet, with an approval on every payout
- Companies whose finance team has to account for the treasury, payment by payment
- Developers who request, check and prove payments from inside their own product
What it gives
- A payment checked before anyone signs, with the approval bound to exactly what is signed
- Your team's wallet signs every payment — Ryntra holds no keys and no funds
- What settled matched to what was approved, read back from Arc
- A sealed receipt anyone can verify with open-source code — no account, no key
What exists now
- Live on Arc Mainnet: verify any Ryntra receipt — no account, no wallet
- Open on Arc Mainnet: get paid with a link or QR; send, checked before you sign; payouts with an approval
- Open on Arc Mainnet: send to your exchange account on Arc; top up Arc from another network
- On testnet: exchange USDC ↔ EURC; export receipts for your books
What this case does not claim
Boundaries are part of the case. If it's not listed as existing, it isn't claimed.
- Ryntra holds no keys and no funds, and nothing passes through its addresses
- Payments are open on Arc Mainnet; the full app runs on testnet
- Coming, not open: getting paid and paying out in EURC, a Safe treasury, batches, card or bank top-up, agent budgets and the payment intents API
- Checks apply to payments prepared in Ryntra; wallet-level rules come with Safe
- Amounts and addresses on Arc are public; Circle services only where Circle serves your country
What I build now.
My attention is on two products of one brand: Ryntra and Ryntra Guard. This page stays as a record of what came before.