mirrored listing x402 eip155:8453

What a trade size actually executes at on Polygon PoS, simulated against live reserves

What a trade size actually executes at on Polygon PoS, simulated against live reserves. Returns best (venue, amountOut, executionPrice, priceImpactBps, feeBps, totalCostBps), routingGain, venues[]. Requires ?pair=SYM/SYM AND ?amountUsd=25000 (or ?amountIn=). pair alone = 400 missing_amount. Errors: 400 bad_pair|missing_amount|bad_amount, 404 no_pools|no_quote|cannot_size_in_usd, 502 upstream_read_failed. Spot price without a size is /price. Chain-pinned; bare /slippage = BSC.

10000 (raw units)

price

calls / 30d

unique payers

2026-08-30

updated

Provider

x402.donnyautomation.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x2740651e046c59aB2A6510401140643292d3a96F",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "amountUsd": "10000",
          "pair": "WMATIC/USDC"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "chainId": 137,
          "network": "polygon",
          "ts": "2026-07-31T00:00:00.000Z"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "amountIn": {
                  "description": "Trade size denominated in the FIRST pair symbol instead of USD. An alternative to amountUsd; supplying either one is enough.",
                  "type": "string"
                },
                "amountUsd": {
                  "description": "Trade size in USD, e.g. 10000. Required unless amountIn is given instead.",
                  "type": "string"
                },
                "pair": {
                  "description": "Token pair as SYM/SYM on Polygon PoS (e.g. WMATIC/USDC).",
                  "type": "string"
                }
              },
              "required": [
                "pair",
                "amountUsd"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://x402.donnyautomation.com/polygon/slippage"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402.donnyautomation.com/polygon/slippage");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402.donnyautomation.com/polygon/slippage")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/4947.json, and this resource appears in /discovery/resources and /discovery/search.