Polymarket Kalshi verdict

Name: Polymarket Kalshi verdict
Price: 0.05 USDC
Availability: InStock

Get one signed Polymarket versus Kalshi card with both yes prices, both links, and the cents left after the books. Pass ?q= as the topic, or omit q for the widest live gap. The signature checks with the published receipt key. $0.05 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.

TradingLiveeip155:8453Exactvia cdp

https://aizamon.com/x402/v1/verdict

PolymarketKalshiVerdictx402Market

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 14 snapshots so far.

$13.66

Verified settled volume

176 settlements proven x402 by their on-chain EIP-3009 marker.

$0.050

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-27 13:41Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "sku": "SKU_AG_VERDICT_01",
        "name": "USD Coin",
        "version": "2",
        "intentId": "83f412d4-98a8-40c7-8cac-25efb859623f",
        "amountUsdc": 0.05,
        "resourceUrl": "https://aizamon.com/x402/v1/verdict",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://aizamon.com/x402/v1/verdict",
      "description": "Get one signed Polymarket versus Kalshi card with both yes prices, both links, and the cents left after the books. Pass ?q= as the topic, or omit q for the widest live gap. The signature checks with the published receipt key. $0.05 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.",
      "maxAmountRequired": "50000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://aizamon.com/x402/v1/verdict",
    "tags": [
      "polymarket",
      "kalshi",
      "verdict",
      "x402",
      "market",
      "under-cap"
    ],
    "iconUrl": "https://aizamon.com/favicon.svg",
    "mimeType": "application/json",
    "description": "Polymarket Kalshi verdict. Get one signed Polymarket versus Kalshi card with both yes prices, both links, and the cents left after the books. Pass ?q= as the topic, or omit q for the widest live gap. The signature checks with the published receipt key. $0.05 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.",
    "serviceName": "Polymarket Kalshi verdict"
  },
  "acceptsV2": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "sku": "SKU_AG_VERDICT_01",
        "name": "USD Coin",
        "version": "2",
        "intentId": "83f412d4-98a8-40c7-8cac-25efb859623f",
        "amountUsdc": 0.05,
        "resourceUrl": "https://aizamon.com/x402/v1/verdict",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxAmountRequired": "50000",
      "maxTimeoutSeconds": 300
    }
  ],
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "q": "openai ipo"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true,
            "sku": "SKU_AG_VERDICT_01",
            "result": {
              "verdict": {
                "line": "Example market: Polymarket yes 0.5, Kalshi yes 0.42, gap 8 cents, cheaper on kalshi.",
                "found": true,
                "paste": "Example market: Polymarket yes 0.5, Kalshi yes 0.42, gap 8 cents, cheaper on kalshi.",
                "netCents": 3
              }
            },
            "protocol": "x402"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "q": {
                    "type": "string",
                    "description": "Market topic. Omit for the widest live gap. The result is a sentence plus both links."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "properties": {
                  "ok": {
                    "type": "boolean"
                  },
                  "sku": {
                    "type": "string"
                  },
                  "result": {
                    "type": "object"
                  },
                  "protocol": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    },
    "aizamon": {
      "sku": "SKU_AG_VERDICT_01",
      "note": "Standard x402 v2. Prefer PAYMENT-SIGNATURE (EIP-3009). Legacy: send USDC then X-PAYMENT {intentId,txHash}.",
      "asset": "USDC",
      "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
      "accept": "https://aizamon.com/x402/v1/verdict",
      "network": "eip155:8453",
      "resumed": true,
      "settler": {
        "mode": "cdp_facilitator",
        "note": "CDP facilitator will verify+settle PAYMENT-SIGNATURE payloads (Bazaar indexing).",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "network": "eip155:8453",
        "payaiUrl": "https://facilitator.payai.network",
        "cdpFacilitator": true,
        "settlerAddress": "0x76ECF3983f71F397e31D4645eAf8A493347e7FfC",
        "payaiFacilitator": true,
        "localSettlerConfigured": true
      },
      "intentId": "83f412d4-98a8-40c7-8cac-25efb859623f",
      "protocol": "x402",
      "queryHint": "Pass ?q= market topic keywords (e.g. ?q=openai+ipo). Optional ?echo= string echoed back.",
      "amountUsdc": 0.05,
      "howToSettle": {
        "headers": {
          "x-agent-id": "<optional-stable-bot-id>",
          "PAYMENT-SIGNATURE": "base64url(PaymentPayload v2 with resource + accepted + payload.authorization)"
        },
        "preferred": "x402 client SDK / wallet agent signs EIP-3009 and retries with PAYMENT-SIGNATURE",
        "legacyHeaders": {
          "X-PAYMENT": "base64url({\"intentId\":\"…\",\"txHash\":\"0x…\",\"paymentRail\":\"usdc_base\"})"
        },
        "classicFulfill": {
          "body": {
            "txHash": "0x…",
            "payload": {},
            "intentId": "83f412d4-98a8-40c7-8cac-25efb859623f",
            "paymentRail": "usdc_base"
          },
          "path": "https://aizamon.com/fulfill",
          "method": "POST"
        }
      },
      "nextStepCute": "Any x402 wallet: sign PAYMENT-SIGNATURE for 0.05 USDC on Base, retry this URL. No MCP install. No email.",
      "recoveryToken": "ca404ea2870e1aa4a296eb9fd2ee16599e13d5d770d7fd52"
    }
  },
  "x402Version": 1
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.05USDC≈ $0.05 USD

on Base · exact scheme

Pay 0.05 USDC on Base to 0xB885…C2887. The signed payment is good for 5 minutes.

Paid to: 0xB885…C2887
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 50000 smallest units

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "sku": "SKU_AG_VERDICT_01",
      "name": "USD Coin",
      "version": "2",
      "intentId": "31e832a3-9927-4613-9d14-17510e491921",
      "amountUsdc": 0.05,
      "resourceUrl": "https://aizamon.com/x402/v1/verdict",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxAmountRequired": "50000",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "q": "openai ipo"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "sku": "SKU_AG_VERDICT_01",
          "result": {
            "verdict": {
              "line": "Example market: Polymarket yes 0.5, Kalshi yes 0.42, gap 8 cents, cheaper on kalshi.",
              "found": true,
              "paste": "Example market: Polymarket yes 0.5, Kalshi yes 0.42, gap 8 cents, cheaper on kalshi.",
              "netCents": 3
            }
          },
          "protocol": "x402"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "q": {
                  "type": "string",
                  "description": "Market topic. Omit for the widest live gap. The result is a sentence plus both links."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "ok": {
                  "type": "boolean"
                },
                "sku": {
                  "type": "string"
                },
                "result": {
                  "type": "object"
                },
                "protocol": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-27 13:41Z
Last indexed by Roundhouse: 2026-11-09 08:10Z
Last enriched (probe, favicon, geo): 2026-11-01 06:16Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 14 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service Polymarket Kalshi verdict and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Polymarket%20Kalshi%20verdict'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://aizamon.com/x402/v1/verdict, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.