Roundhouse

d2ngmd5yvdfkqu.cloudfront.net

Historical pricing for a single prediction market on one exchange.

TradingLiveeip155:8453Exactvia cdp
https://d2ngmd5yvdfkqu.cloudfront.net/price-history
Settlements · 30d
79↓ 36%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$1.48
Verified settled volume
1,133 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-06-08 22:17Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x995c0abdcd2ad76548e5f7deb54d32549b2b781f

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": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x995c0abdcd2ad76548e5f7deb54d32549b2b781f",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.predictionmarketdata.io/price-history",
    "mimeType": "",
    "description": "Historical pricing for a single prediction market on one exchange."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "event": "KXNBAGAME-26JUN08SASNYK.KALSHI",
            "limit": "288",
            "interval": "300000",
            "exchangeId": "4141"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "data": [
              {
                "ts": "2026-06-07T20:25:00Z",
                "markets": [
                  {
                    "volume": "5817.81",
                    "lowPrice": "0.55",
                    "highPrice": "0.55",
                    "openPrice": "0.55",
                    "volumeUsd": "3199.79",
                    "closePrice": "0.55",
                    "tradeCount": 49,
                    "lukkaSymbol": "KXNBAGAME-26JUN08SASNYK-NYK_yes.KALSHI"
                  }
                ]
              }
            ],
            "count": 1,
            "dataType": "predictionHistoryCandles",
            "lastDate": "2026-06-07T20:25:00Z",
            "sourceId": 4141,
            "firstDate": "2026-06-07T20:25:00Z",
            "eventTicker": "KXNBAGAME-26JUN08SASNYK.KALSHI"
          }
        }
      },
      "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"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "event",
                  "exchangeId"
                ],
                "properties": {
                  "to": {
                    "type": "string",
                    "description": "UTC end timestamp in ISO-8601 format."
                  },
                  "from": {
                    "type": "string",
                    "description": "UTC start timestamp in ISO-8601 format."
                  },
                  "event": {
                    "type": "string",
                    "description": "Event ticker or market identifier (from /prediction-markets)."
                  },
                  "limit": {
                    "type": "string",
                    "description": "Maximum number of buckets to return (e.g. 288 for 24h of 5m candles)."
                  },
                  "interval": {
                    "type": "string",
                    "description": "Bucket size in milliseconds (e.g. 300000 for 5-minute candles)."
                  },
                  "exchangeId": {
                    "type": "string",
                    "description": "Numeric exchange ID. 4141=Kalshi, 4137=Polymarket, 4008=Gemini."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

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

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x995c…b781f. The signed payment is good for 5 minutes.

Paid to
0x995c…b781f
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x995c0abdcd2ad76548e5f7deb54d32549b2b781f",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "event": "KXNBAGAME-26JUN08SASNYK.KALSHI",
          "limit": "288",
          "interval": "300000",
          "exchangeId": "4141"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "data": [
            {
              "ts": "2026-06-07T20:25:00Z",
              "markets": [
                {
                  "volume": "5817.81",
                  "lowPrice": "0.55",
                  "highPrice": "0.55",
                  "openPrice": "0.55",
                  "volumeUsd": "3199.79",
                  "closePrice": "0.55",
                  "tradeCount": 49,
                  "lukkaSymbol": "KXNBAGAME-26JUN08SASNYK-NYK_yes.KALSHI"
                }
              ]
            }
          ],
          "count": 1,
          "dataType": "predictionHistoryCandles",
          "lastDate": "2026-06-07T20:25:00Z",
          "sourceId": 4141,
          "firstDate": "2026-06-07T20:25:00Z",
          "eventTicker": "KXNBAGAME-26JUN08SASNYK.KALSHI"
        }
      }
    },
    "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"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "event",
                "exchangeId"
              ],
              "properties": {
                "to": {
                  "type": "string",
                  "description": "UTC end timestamp in ISO-8601 format."
                },
                "from": {
                  "type": "string",
                  "description": "UTC start timestamp in ISO-8601 format."
                },
                "event": {
                  "type": "string",
                  "description": "Event ticker or market identifier (from /prediction-markets)."
                },
                "limit": {
                  "type": "string",
                  "description": "Maximum number of buckets to return (e.g. 288 for 24h of 5m candles)."
                },
                "interval": {
                  "type": "string",
                  "description": "Bucket size in milliseconds (e.g. 300000 for 5-minute candles)."
                },
                "exchangeId": {
                  "type": "string",
                  "description": "Numeric exchange ID. 4141=Kalshi, 4137=Polymarket, 4008=Gemini."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-06-08 22:17Z
Last indexed by Roundhouse
2026-07-08 21:00Z
Last enriched (probe, favicon, geo)
2026-09-22 15:15Z
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 d2ngmd5yvdfkqu.cloudfront.net 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=d2ngmd5yvdfkqu.cloudfront.net'
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://d2ngmd5yvdfkqu.cloudfront.net/price-history, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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