polymarket-trading

Polymarket Trading (blockrun_polymarket)

Real-money trading on Polymarket's CLOB V2 (Polygon), signed locally by the user's BlockRun wallet key. Data discovery stays on blockrun_markets — this tool only trades.

Mental model

• Signer = the BlockRun wallet key (~/.blockrun/.session by default; a BLOCKRUN_WALLET_KEY env var or an existing agent wallet.json takes precedence). Never leaves the machine. setup prints the actual signer address — back up the key behind it, wherever it lives (key file or env-var value).
• Deposit wallet = a Polygon vault contract derived from that key (POLY_1271). It holds the betting funds in pUSD and only honors the signer's EIP-712 signatures. Deploy/approve/redeem are gasless (relayer).
• Money separation: bets spend pUSD on Polygon; x402 API fees spend USDC on Base. The budget ledger does NOT cover bets — confirm:true + caps do.
• Zero setup: no Polymarket account, no API keys, no gas token. On first setup the MCP bootstraps a builder key from the user's OWN wallet, then derives + deploys the vault (all gasless). Geoblock is handled by default — CLOB traffic routes through BlockRun's Finland egress out of the box.

Golden rules for agents

1. Never pass confirm:true unless the user explicitly approved that exact trade. Call once WITHOUT confirm → show the dry-run preview → ask → re-call with confirm:true.
2. Per-order cap POLYMARKET_MAX_BET_USD (default $25) and optional session cap are enforced server-side; don't try to split orders to sneak past them.
3. On ANY error, read the message — it says exactly what to do next (fund, approve, region, re-run setup). Don't retry blindly.

End-to-end flow

# 0. No Polymarket account or API keys needed — the MCP bootstraps everything
#    from the user's own wallet on first setup. (Geoblock is already handled:
#    CLOB traffic routes through BlockRun's Finland egress by default. Set
#    POLYMARKET_CLOB_HOST only to use your own egress, or to hit Polymarket
#    directly from a permitted region.)

# 1. Provision + inspect (idempotent, safe to re-run any time)
blockrun_polymarket action:"setup"
# → deposit wallet address + funding instructions + region status

# 2. Fund the vault from the user's Base USDC — gasless x402, one call ($0.01 fee,
#    non-custodial). pUSD credit is ASYNC (minutes) — re-run setup to watch it. Min $2.
blockrun_polymarket action:"fund" amount_usd:5             # dry-run preview
blockrun_polymarket action:"fund" amount_usd:5 confirm:true

# 3. Sign the one-time gasless approval batch (after user consent)
blockrun_polymarket action:"setup" confirm:true

# 4. Find a market, then resolve the selected condition (paid data)
blockrun_markets path:"markets/search" params:{q:"Bitcoin",status:"open",venue:"polymarket",limit:"20"}
blockrun_markets path:"polymarket/markets/keyset" params:{condition_id:"0x...",status:"open",limit:"5"}

# 5. Preview, then place
blockrun_polymarket_read action:"preview" side:"buy" token_id:"..." amount_usd:5 order_type:"FOK"
blockrun_polymarket action:"buy" token_id:"..." amount_usd:5 order_type:"FOK" confirm:true
#   or limit: price:0.45 size:10 (GTC; order_type:"GTD" + expires_at for expiry)
#   or via condition: condition_id:"0x..." outcome:"Yes"

# 6. Manage
blockrun_polymarket_read action:"orders"                # open orders
blockrun_polymarket action:"cancel" order_id:"..."      # or all:true
blockrun_polymarket_read action:"positions"             # holdings + PnL + redeemable

# 7. Claim winnings after resolution (gasless)
blockrun_polymarket action:"redeem" condition_id:"0x..."             # preview
blockrun_polymarket action:"redeem" condition_id:"0x..." confirm:true

# 8. Cash out — pUSD → native USDC on Base, back to the user's agent wallet
blockrun_polymarket action:"withdraw"                                # dry-run (full balance)
blockrun_polymarket action:"withdraw" confirm:true                   # (partial: amount_usd:5)