ATRIUM
Open the desk

Options, written in glass

An on-chain options desk where agents write and buy covered calls and cash-secured puts on stock tokens. Fully collateralised, settled on Robinhood Chain.

The options desk
built for agents

01What it is

Every option is a plate of collateral.

ATRIUM is an options desk that lives on-chain. A writer locks the full collateral before an option exists: the stock token for a call, the dollars for a put. A buyer pays the premium and receives the option as an NFT.

Nothing is lent, nothing is margined, no oracle decides. At expiry the holder chooses, and the contract swaps the assets.

02How it works

Four moves, all on-chain.

  1. 01

    Write

    Lock one stock token for a call, or strike × size in USDG for a put. Pick a strike and an expiry. Your plate goes up on the wall.

    atrium write NVDA put -8%
  2. 02

    Quote

    The premium comes from Black-Scholes on 30-session realised volatility, with a floor of 0.25% of notional so small lots are never mispriced.

    atrium quote NVDA put 168
  3. 03

    Buy

    The buyer pays the premium in USDG. 98% goes to the writer at once, 2% to the desk. The option arrives in the wallet as an NFT.

    atrium buy 0x…plate
  4. 04

    Settle

    Before expiry the holder may exercise: pay the strike for a call, deliver the token for a put. Otherwise the writer's collateral comes home.

    atrium exercise 0x…plate

03The board

Every plate on the wall is a strike.

Indicative · preview

8 stock tokens, 7 strikes each, 4 weekly expiries: 56 plates hang in the hall. Hover a row and its plate lights up. Select one to open a ticket.

—spot · — vol
StrikeFrom spotPremiumYieldBreak-evenP(ITM)

04For agents

Your agent already speaks it.

Connect over MCP, call the HTTP API and pay per call with x402, or drop the one-file CLI into any runtime. Every transaction is simulated before your agent is charged. A failed simulation costs nothing.


      
    
    
    
  
    

  
  
    
    
    
      
    05Pricing
    
      
    Fair by formula, floored by size.
    
      
    Premium is Black-Scholes with r = 0 on 30 sessions of realised volatility. A flat minimum would make a one-share option cost many times its fair value, so the floor is 0.25% of notional instead: one share and a hundred shares are priced on the same terms.
    
      
    
        
    premium = max( BS(S, K, σ30, T), 0.25% · K · size )
    
        
    writer = 98% · premium · paid at once
    
        
    desk = 2% · premium · split below
    
      
    
    
    
    
    
      
    
        
        
        
      
    
      
        
        
        
        
        strike
        0
        price at expiry →
      
      
    
    
    
  
    

  
  
    
    
    
      
    06$ATRM
    
      
    The token takes the desk's cut.
    
      
    Every premium pays a 2% desk fee. The router splits it in the same transaction, by a ratio fixed in the contract. Nobody can redirect it, including us.
    
      
      
      
        
    • 50%StakersPaid in USDG to staked $ATRM, pro rata.
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    • 30%Buyback & burnBuys $ATRM on the market and burns it, on every settlement. Live from the first trade.
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    • 20%House vaultCapital for the house writer, so the wall stays full.
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    Desk fee—
    
          
    To stakers—
    
          
    Burned—
    
          
    House vault—
    
        
    
        
    Illustration of the split, not a forecast of volume.
    
      
    
    
    
  
    

  
  
    
    
    
      
    07Safety
    
      
    Built so nothing can be owed.
    
    
    
    
    
    Risks. Smart contracts can fail. Options can expire worthless. Writers can be assigned at a worse price than the market. Stock tokens are not available in every jurisdiction. Nothing on this page is financial advice.
    
  
    

  
  
    
    
    
      
    08Questions
    
      
    Plainly answered.
    
      
    
        
    What is a covered call?
    You own the stock token and lock it in the contract. Someone pays you a premium for the right to buy it from you at the strike before expiry. You keep the premium either way.
    
        
    What is a cash-secured put?
    You lock enough USDG to buy the token at the strike. Someone pays you a premium for the right to sell it to you at that price. If they don't, your USDG comes back with the premium kept.
    
        
    Do I need an agent to use ATRIUM?
    No. The desk works from a wallet in the browser. Agents simply get first-class access: MCP tools, a paid HTTP API and a CLI.
    
        
    What does an agent pay?
    0.02 USDG per paid API call through x402, signed once with no account and no API key. Reading the chain is free. The 2% desk fee applies to premium only.
    
        
    Who writes options when nobody else does?
    The house writer. Every hour it lists puts 8% below spot and calls 8% above, funded by the house vault's share of fees. It is a fixed rule, not a black box.
    
        
    What happens at expiry?
    If the holder exercised, the assets have already swapped. If not, the option expires and the writer withdraws the collateral. The NFT stays as a record.
    
        
    Is ATRIUM live?
    This site and the board are a preview with indicative prices. Contracts deploy at launch; their addresses and the $ATRM contract will be published here and on X.
    
      
    
    
    
  
    

  
  
    
    
    
      
    09Daylight
    
      
    Step inside.
    
      
    An options desk your agent can reach in one call. Collateral first, always.
    
      
    
        Open the desk
        Connect an agent