Yield-bearing dollar for agent operators

Agent
Dollar.

ASPAN is building a yield-bearing dollar for the agent economy, allowing AI agents and their operators to earn staking-backed yield on operating balances and use it to pay for compute, data, and services.

Launch demo ↗Read the docs

Pre-launch. Yield is designed to accrue through s-apUSD staking; this demo uses sample balances and simulated payments.

Operating dollar
apUSD
Yield balance
s-apUSD
Agent payments
Compute · Data
Yield source
BNB staking
Plate IOperator flow

Three steps.

  1. Fund operating balance

    Mint apUSD with LSTs

    Deposit supported LST collateral such as slisBNB, asBNB or wclisBNB, then mint apUSD for agent operating balances.

  2. Stake idle balance

    s-apUSD yield balance

    Stake idle apUSD as s-apUSD, where BNB staking rewards are designed to lift the exchange rate.

  3. Pay for services

    Compute, data, settlement

    Redeem s-apUSD when funds are needed, then use apUSD payment flows for compute, data and services. Stability mode can make redemptions include xBNB too.

Plate IIThe balances

Operate, earn,
then leverage.

  • apUSD

    Stablecoin

    The spendable operating balance for agents and operators. It is backed by over-collateralized LSTs and designed for compute, data, service and settlement flows.

  • s-apUSD

    Yield vault

    Stake apUSD when balances are idle. The live design routes BNB staking rewards into the s-apUSD exchange rate; if stability mode is triggered, redemption can include both apUSD and xBNB.

  • xBNB

    Dynamic BNB exposure

    The residual claim on collateral after apUSD liabilities. Its exposure changes with collateral ratio, absorbs vault volatility and can fall to zero if the system becomes underwater.

Plate IIIOperating balances that can earn

Staking-backed
yield.

Agents can hold apUSD for spendable balances, then stake idle balances as s-apUSD. The intended yield source is the LST collateral: BNB staking rewards are designed to route into the s-apUSD exchange rate while apUSD remains the unstaked dollar balance.

AssetYieldSource
USDT / USDCNone (0%)Mining subsidies, when offered
s-apUSDReal yieldBNB staking rewards

s-apUSD exchange rate

DAY 1
1 s-apUSD = 1.000 apUSD
SAMPLE
1 s-apUSD = 1.015 apUSD

Illustrative. No rate is promised before launch. If stability mode is triggered, s-apUSD redemption can include xBNB as well as apUSD.

Plate IVProgrammable payments

Pay for compute,
data and services.

The payment layer will let agent operators move from yield-bearing operating balances into conditional, streamed, escrowed or split settlement.

Upcoming

  • Conditional transfers

    apUSD will be able to carry release conditions for compute jobs, data access, service retainers and multi-party settlement.

  • Agent-native settlement

    AI agents and their operators will be able to hold, spend and settle apUSD balances without a custodian in the loop.

  • Yield that keeps working

    Idle operating balances are designed to stay staked as s-apUSD until the moment they are needed for payment.

Try payment demo ↗

None of this is live. Explore conditional payments for compute, data and service flows in the interactive concept demo.

Plate VFoundation

Why the vault
matters.

  • 01

    LST collateral

    slisBNB · asBNB · wclisBNB
    vault backing

    The dollar system starts with staked BNB collateral, so operating balances are anchored by productive LSTs.

  • 02

    BNB staking rewards

    s-apUSD
    yield route

    The live design routes collateral rewards toward s-apUSD, while unstaked apUSD remains the spendable dollar balance.

  • 03

    xBNB risk layer

    Dynamic
    exposure

    xBNB is the residual risk layer that absorbs collateral moves after apUSD liabilities are accounted for.

Plate VILeverage foundation

Leverage is a
straight line.

apUSD is accounted as a dollar liability, so collateral moves are reflected in the residual xBNB layer. At a fixed collateral ratio, the relationship is an illustrative straight line through the pivot, steeper as the ratio tightens.

3.00×xBNB
1.00×apUSD

The invariant

150%
120%300%

If BNB moves +10%

+30.0%

Illustrative. Leverage tokens decay in range-bound markets.

Plate VIIRisk management

Built-in risk
controls.

  • SM1

    Fee incentives

    CR 130–150%

    Configured fee tiers can discount or waive xBNB minting when collateral ratio moves below the normal range.

  • SM2

    Stability conversion

    CR below 130%

    The protocol can burn vault apUSD and credit xBNB to the s-apUSD vault, reducing dollar liabilities while stakers absorb risk.

  • REC

    Vault cleanup

    Post-SM2 recovery

    Keeper or owner cleanup can convert vault xBNB back into apUSD, capped per call and guarded by a 140% post-clean collateral ratio.

  • PAUSE

    Incident response

    Owner pause

    The owner can pause mint, redeem and recovery paths while oracle, collateral or operational issues are investigated.

Plate VIIISequencing

Roadmap.

  1. Phase 1

    Yielding dollar core

    Contracts / demo prototype

    apUSD, s-apUSD, xBNB and the LST-backed vault mechanics designed to fund staking-backed yield.

  2. Phase 2

    Programmable payments

    In design

    Conditional, streamed, escrowed and split settlement for compute, data and service payments.

  3. Phase 3

    Agent economy

    Exploratory

    AI agents as first-class users of yield-bearing operating balances.

Your next moveExplore ASPAN

Run the agent
dollar demo.

Mint apUSD, stake idle balances as s-apUSD, and try programmable payments with sample operating funds.

Launch demo Read the protocol docs ↗

No wallet required. Sample balances only. The protocol is pre-launch.