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Polygon DEX Best Execution Router
x402
Polygon DEX Best Execution Router is a paid API for AI agents from x402.donnyautomation.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns the optimal buy and sell venues across QuickSwap, SushiSwap, and Uniswap v3 on Polygon PoS, including cross-exchange spread in basis points, fee-adjusted arbitrage spread, and optimal trade size for a given token pair.
Price / call$0.01
Success—
StatusUnknown
How this service works
Cheapest venue to buy and richest to sell ONE pair on Polygon PoS across QuickSwap, SushiSwap and Uniswap v3. Returns buyAt and sellAt (venue, price, tvlUsd), midSpreadBps, grossSpreadBps, optimalInput, venuesConsidered. Requires ?pair=SYM/SYM (e.g. WMATIC/USDC). Errors: 400 bad_pair, 404 not_routable, 502 upstream_read_failed. Ranks venues for one pair; to rank EVERY pair use /scan. Execution at a size is /slippage. Chain-pinned; bare /route = BSC.
Output
Returns the best buy venue (e.g. QuickSwap), the best sell venue, the cross-exchange spread in basis points, a fee-adjusted gross arbitrage spread, and the optimal trade size for the specified Polygon PoS token pair. Data is sourced live from QuickSwap, SushiSwap, and Uniswap v3 on-chain state.
Example use cases
Arbitrage bot opportunity detection
“Is there a profitable arbitrage opportunity right now for WMATIC/USDC across Polygon DEXs? Tell me the spread in bps, which venue to buy on, which to sell into, and what the optimal trade size would be.”
Best execution for a large token swap
“I want to swap a big chunk of USDC into WETH on Polygon — which DEX gives me the best buy price right now and what's the fee-adjusted spread I should expect?”
Real-time DEX price comparison for trading agent
“Before I execute this WMATIC/USDC trade on Polygon, compare prices live across QuickSwap, SushiSwap, and Uniswap v3 and tell me which venue is cheapest to buy on and which pays the most to sell into.”
Technical details
Endpoint
GEThttps://x402.donnyautomation.com/polygon/routeWhen to prefer
Choose this endpoint when you need real-time best-execution routing specifically on Polygon PoS across QuickSwap, SushiSwap, and Uniswap v3. Prefer it over generic price feeds when you need cross-DEX spread analysis, fee-adjusted arbitrage metrics, and optimal trade sizing in a single call. Use the Arbitrum or Base sibling endpoints for those respective chains instead.
Side effects
- Unsupported token pair returns an error or empty result
- Highly illiquid pairs may return unreliable spread estimates
- Network congestion on Polygon may cause stale price data
- Malformed pair symbol (e.g. missing slash or wrong ticker) returns a validation error
- Payment failure (insufficient USDC balance for x402 micropayment) blocks the call
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ts": "2026-07-31T00:00:00.000Z",
"chainId": 137,
"network": "polygon"
}
}Tags
x402
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