Simmer Wallet Setup

Self-custody wallet setup for an agent that signs its own real-money trades on Polymarket or Kalshi. Two paths:

Already on a managed wallet? You don't need this skill. Managed setup is a one-time dashboard action — go to simmer.markets/dashboard, connect a Polygon wallet, approve the contracts, and the Simmer server signs trades within those approval bounds. No agent-side setup required.

Path A — OWS per-agent wallet (recommended)

OWS = Open Wallet Standard. Local-first encrypted vault, multi-chain, policy engine, agent-scoped API keys. The private key never leaves the local machine.

One-time setup

# Install OWS CLI
curl -fsSL https://docs.openwallet.sh/install.sh | bash
pip install open-wallet-standard

# Create a wallet for this agent
ows wallet create --name "my-agent-wallet"
# Stores at ~/.ows/wallets/, derives addresses for EVM (Polygon), Solana, etc.

# Fund it — show the EVM address to the human, they bridge USDC.e to Polygon
ows wallet show my-agent-wallet

Register the wallet with Simmer

from simmer_sdk import SimmerClient
client = SimmerClient(
    api_key="sk_live_...",
    ows_wallet="my-agent-wallet",   # name from `ows wallet create`
)

client.register_agent_wallet()  # one-time, Elite-tier gated
client.set_approvals()          # one-time per chain (signed via OWS)

⚠️ Setup requires a dashboard session. register_agent_wallet() and set_approvals() use the browser auth from simmer.markets/dashboard in addition to the API key — they don't work from a fully headless cron. Run them once after logging in. Trading is API-only after that.

(Alternative: set OWS_WALLET=my-agent-wallet in the environment and pass only api_key — the SDK auto-detects.)

Trade — same API, OWS routes the signing

result = client.trade(
    market_id, "yes", 10.0,
    venue="polymarket",
    reasoning="..."
)
# SDK builds the order, OWS signs locally, broadcast goes through Simmer

For Kalshi (Solana)

OWS is multi-chain. The same wallet has a Solana account derived automatically.

ows wallet show my-agent-wallet  # shows Solana address too
# Fund with SOL + USDC, complete KYC at dflow.net/proof

client = SimmerClient(
    api_key="sk_live_...",
    ows_wallet="my-agent-wallet",
    venue="kalshi",
)
client.trade(market_id, "yes", 5.0, reasoning="...")

No SOLANA_PRIVATE_KEY env var needed — OWS handles signing through the same vault.

What OWS gives over raw keys

• Encrypted at rest (AES-256-GCM, scrypt KDF). Private key only decrypted in-process for signing, then wiped.
• Policy engine — chain allowlists, daily caps, contract allowlists. Optional.
• Multi-chain — same vault, every chain Simmer supports.
• Per-agent isolation — separate wallets per agent for clean P&L attribution.
• Agent API keys with bounded access (revocable, expiring).

Path B — External raw key

Fully supported path for self-custody with an existing wallet. New agents should consider OWS first — same self-custody guarantee, encrypted at rest, multi-chain, and easier to layer policy controls. Raw-key flow stays supported for users who already have it set up.

Set the key in the environment, then construct the client:

export WALLET_PRIVATE_KEY="0x..."  # Polymarket Polygon wallet

client = SimmerClient(api_key="sk_live_...")
# private_key is auto-detected from WALLET_PRIVATE_KEY env var
client.link_wallet()
client.set_approvals()

⚠️ link_wallet() and set_approvals() need a dashboard session — they use the browser auth from simmer.markets/dashboard, not the SDK API key. Run them once from a logged-in dashboard, not a headless script. After that, the rest of the agent runs API-only.

Migrating to OWS when ready

No rush. When ready, import the existing key into OWS and switch over:

ows wallet import --name "my-agent-wallet" --private-key "$WALLET_PRIVATE_KEY"
unset WALLET_PRIVATE_KEY  # OWS handles signing from here

Then in the agent code:

client = SimmerClient(api_key="sk_live_...", ows_wallet="my-agent-wallet")
# Same trade() / set_approvals() / redeem() API — OWS routes the signing

The same wallet address is preserved, so existing positions and approvals carry over.

Polymarket token note

Polymarket trades against whatever collateral token Polymarket currently uses for its CLOB (currently pUSD, the V2 collateral). The dashboard at simmer.markets/dashboard shows what the wallet needs and walks through setup. Watch for the V2 era banner at the top — it's the entry point.

First-time activation (new users with no prior Polymarket activity): the dashboard prompts a USDC → pUSD wrap plus a one-time approval sequence (~8 signatures total). Total ~30 seconds of clicks and ~$0.20 in gas.

Existing Polymarket users with USDC.e from before V2: the dashboard prompts a one-click migration (~30s) — no need to re-deposit.

Either way, after setup client.set_approvals() should report all_set=True. If it doesn't, see docs.simmer.markets/v2-migration.

Risk monitor

The auto risk monitor (stop-loss, take-profit) is configured at simmer.markets/dashboard → Settings → Auto Risk Monitor. The SDK auto-executes pending exits each get_briefing() cycle. The agent must be running.

Troubleshooting

• "External wallet requires a pre-signed order" → key not configured. For OWS: ows wallet list to verify the wallet exists. For external: confirm WALLET_PRIVATE_KEY is set.
• "insufficient allowance" → run client.set_approvals() once per wallet.
• Balance shows $0 but funds visible elsewhere → check chain (Polygon vs Solana) and token (pUSD vs USDC.e). See dashboard migration tool for V2 conversion.

Links

• OWS docs: openwallet.sh
• Simmer wallet docs: docs.simmer.markets/wallets
• V2 migration guide: docs.simmer.markets/v2-migration