A paper trading environment built on live Polymarket CLOB quotes. Bring your own strategy — bot, agent, or thesis. Real prices. Real order types. No real USDC at risk.
36-HOUR FREE TRIAL · NO CARD REQUIRED
The structure is unique. Testing with real money means debugging with your wallet. Most traders pay the market to find out their bot has a sign error.
Pay to find bugs. Order sizing errors, wrong side logic, fee miscalculations — every mistake costs real USDC.
Can't isolate edge. A winning week could be the market, not your strategy. There's no clean signal in noisy data.
Binary outcomes, CLOB quirks, NegRisk. None of this translates from crypto or equities. You need reps before you risk capital.
Debug for free. Run your bot against live CLOB prices, catch every logic error, iterate without cost.
Clean P&L analytics. Separate luck from edge with per-strategy tracking, fill history, and win rate data.
API parity. One environment variable is all that changes between sandbox and live. No re-wiring required.
Every feature is designed for the builder who wants API parity with live Polymarket — so moving from sandbox to live is a one-line change.
Fills are priced at actual Polymarket bid/ask in real time. If the market moves, your fills reflect it.
Real pricesSame order types as live Polymarket. Fill-and-Kill for immediate execution, Good-Till-Cancelled for limit orders. Your bot logic works identically.
API parityConnect Claude, GPT, or any MCP-compatible agent directly. Test your autonomous trading agent before it touches real USDC.
Agent-readyIsolate whether a loss was bad logic or bad market conditions. Track fills, positions, win rate, and ROI per strategy run.
Per-strategyRun your strategy against historical Polymarket data. Validate your logic on past markets before committing to live ones. (Pro+)
Historical dataFull programmatic access. Issue API keys, connect multiple bots, and integrate with your existing trading infrastructure.
ProgrammableWhether you're writing a bot in Python or building an AI agent with Claude, the integration is the same — and so is the path to live Polymarket.
# Place a paper order curl -X POST https://api.polysandbox.trade/v1/sandbox/{sandbox_id}/order \ -H "X-API-Key: YOUR_KEY" \ -d '{"token_id":"0x3a4b...","side":"buy","budget_usd":50,"order_type":"FAK"}' → {"filled": 50.0, "avg_price": 0.624}
Full API reference at docs.polysandbox.trade.
// ~/.claude/claude_code_config.json { "mcpServers": { "polysandbox": { "url": "https://sandbox-x402-mcp.polysandbox.workers.dev/mcp", "transport": "http" } } } export POLYSANDBOX_API_KEY="your_api_key" export POLYSANDBOX_PRIVATE_KEY="0x..." # Polygon wallet for signal payments
Works with Claude Code, Claude Desktop, and any MCP client. Signal tools use x402 micropayments on Polygon — see MCP docs.
36-hour free trial on every new account. No card required. If the sandbox fits your workflow, subscribe.
No credit card required
We've built, validated, and run these strategies on live Polymarket. Once you're inside, you'll find them waiting. If they add to your edge, one click subscribes. If not — your own strategy is still the point.
Directional signal for short-window BTC, ETH, SOL, and XRP price prediction markets. Fires multiple times daily per asset with a defined confidence score. Plug it in and measure.
Directional signal for daily temperature outcome markets across 12 major cities. Fires when our probability estimate diverges meaningfully from current market pricing.
No. The sandbox is fully independent. You don't touch real Polymarket until you're ready.
Yes. Your fills are priced at live Polymarket CLOB quotes pulled in real-time. The only thing fake is the USDC.
Your sandbox pauses. Your data stays. Subscribe to continue — or export your results and decide later.
Yes. The sandbox exposes the same REST API your bot would use against live Polymarket. Change one environment variable and you're live.
Model Context Protocol. It lets AI agents (Claude, GPT, etc.) interact with the sandbox as a tool. Build an autonomous trading agent and test it here before it touches real money.
Signals run inside your sandbox. The sandbox is the environment — signals are optional strategies you can layer on top of your own.
Signals are available on a token or subscription basis, visible inside the app. Try them in the sandbox first — subscribe only if they fit your workflow.
No. Polysandbox is an independent product. We use Polymarket's public CLOB data to price fills. We are not affiliated with, endorsed by, or partnered with Polymarket.
All plans are self-serve. If you need team seats, a custom SLA, or a dedicated channel, email quants@polysandbox.trade.