Bring a framing.
Let others take it.
Pool assets around a theme, publish the analytics behind it, and let anyone size into the whole framing in one call.
Explore the bins
Trade everything.
Borrow nothing.
A full mobile trading terminal on Monad. Size is notional, not debt — and your margin comes from gAUSD and vUSD already earning in Euler.
Move to discover ↗
Interactive visualisation / Illustrative, not live market data
One terminal.
Every market.
Nothing borrowed.
WHY OPENCASH
A full trading interface on Monad, where notional is accounting rather than debt, margin comes from assets already earning, and a bin takes a whole framing in one call.
One deposit.
A whole market.
From idle collateral
to an open position.
OpenCash sits between Euler's vaults and Monad's venues. Notional is accounting rather than debt, margin keeps earning while it backs you, and every call is signed by your own passkey.
openCASH
Yield-bearing collateralUnbacked notionalThematic binsPasskey-signed calls BUILT ONMonadEuler vaultsPasskey signing ↗
Trade a market.
Or a whole framing.
Notional sizing that borrows nothing, margin drawn from assets already earning, and bins that pool a theme into one position.
NOTIONAL / MARGIN × LEVERAGE FOR LEVERAGE
Size without borrowing.
Notional is margin × leverage — accounting, not a loan. Nothing is lent, no interest accrues, and there is no lending pool on the critical path.
- Size
- margin × leverage
- Borrowed
- Nothing
- Liquidation
- Euler's engine, not ours
COLLATERAL / EULER VAULTS FOR gAUSD & vUSD HOLDERS
Margin that never stops earning.
Collateral stays in the Euler vault it already sits in, under your own sub-account. The yield keeps running for as long as the position is open.
- Accepted
- gAUSD · vUSD · PT-AUSD
- Held in
- Euler vaults, your sub-account
- Yield
- Runs while the position is open
THEMATIC BINS / POOLED FRAMING FOR ANYONE WITH A VIEW
The framing is the instrument.
A bin pools assets around one theme — AI capex, a name in the headlines, gold against the dollar — with analytics on every pool. Institutions size into a framing, or out of it, in a single call.
- Composition
- Pooled around one theme
- Pricing
- Each leg on its own venue
- Feeds
- Official markets only
Proposed surfaces. No live markets are listed on OpenCash yet.
See a position form.
Make the next move.
A small, interactive look at the terminal we’re building. Walk a sample bin from idle collateral to a signed call.
INTERACTIVE DEMO
OpenCash Sample Bin
Illustrative basket · No funds or transactions are sent.
A CLEAR PATH FROM IDEA TO POSITION- 01 Supply idle collateral Ready
- 02 Pick a bin Upcoming
- 03 Set the notional Upcoming
- 04 Sign with your passkey Upcoming
Start with gAUSD already earning in an Euler vault.
One terminal.
Every leg connected.
For traders, bin builders, and developers composing positions across Monad's venues.
Bring a framing.
Compose the legs.
Keep your own keys.
Build against an EIP-7702 delegate on Monad. A passkey authorises a session key scoped to named targets and selectors; OpenCash never receives a private key.
View integration overview
OpenCashDelegate verifies a WebAuthn assertion on
the P-256 precompile, then executes a batch of calls. Anything outside an
authorised scope is unreachable.
authorizeSession(key, expiry, targets[], selectors[])
executeWithSession(calls[], signature)
verifyAndExecute(calls[], webAuthnAuth)
revokeSession(key)
rotatePasskey(x, y)Stated honestly: delegation adds a code path, it does not remove the account key's own authority. What it removes is the app's ability to withdraw.
Every market.
One call.
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