Beam app request: Polymarket (prediction-market trading)

[LesCosmonautes]

App

Polymarket — place and manage prediction-market orders (CLOB) from a Beam agent.

One-liner: Prepare Polymarket prediction-market orders through Beam-mediated CLOB HTTP, order signing, and onchain settlement planning.

Chain

• Polygon
• Collateral / trading token: pUSD (Polymarket USD) — ERC-20 backed 1:1 by USDC, settlement in native USDC underneath
• Deposit in USDC (or 20+ supported tokens) → wrapped to pUSD via CollateralOnramp wrap(); unwrap via CollateralOfframp

Capabilities (CAPS)

CAP	Use
LIMIT ORDER	Build, sign and cancel CLOB orders (buy/sell YES/NO shares)
HTTP	Polymarket CLOB REST API — markets, order book, order submit
CHAIN READ	Positions, USDC balance, allowances
SIMULATE	Dry-run settlement / redemption before signing

Why I'd use it

• Prediction markets are order-book based
• Signing happens off-chain (EIP-712) then settles on-chain, which maps cleanly onto Beam permissions + SIMULATE before commit.
• Lets an agent price, place, and unwind positions with bounded, auditable permissions.

Acceptance criteria

• Read markets + order book via CLOB API
• Build and sign a limit order (with per-order size/price caps in Beam permissions)
• Simulate settlement/redeem before any on-chain tx
• Read current positions and PnL

Links

• https://polymarket.com
• https://docs.polymarket.com

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Also would use (lower priority, happy to file separately)

• Aerodrome (Base) — SWAP, VOTE, CHAIN READ, SIMULATE
• Morpho (Ethereum / Base) — SUPPLY, BORROW, CHAIN READ, SIMULATE
• Hyperliquid — PERP, LIMIT ORDER, HTTP, CHAIN READ