Roundhouse AI

market-resolution

Did it happen? Check whether a prediction market event has settled on Polymarket or Kalshi and get the resolved outcome, resolution time, source and market URL. A cheap oracle for agents that must verify a real-world outcome before acting.

TradingLiveeip155:8453Exactvia cdp
https://x402.fenixfoundry.com/resolution
Prediction-marketsResolutionOraclePolymarketKalshi
Calls · 30d
6↑ 35%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.54
Verified settled volume
68 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.
5
Calls · 30d
Upstream's own call count for this endpoint, not ours.
4
Unique payers · 30d
Last called 2026-09-17 03:25Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x737426d3eD53930B889b3f61774669a0FDf3BE54

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.

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 0x7374…3BE54. The signed payment is good for 1 minute.

Paid to
0x7374…3BE54
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x737426d3eD53930B889b3f61774669a0FDf3BE54",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "q": "Did the US government shut down in 2026?"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "id": "KXGOVSHUTDOWN-26",
          "url": "https://kalshi.com/markets/kxgovshutdown-26",
          "query": "Did the US government shut down in 2026?",
          "venue": "kalshi",
          "outcome": "No",
          "resolved": true,
          "closeTime": "2026-01-31T00:00:00.000Z",
          "confidence": 0.93,
          "resolvedAt": "2026-01-31T18:04:00.000Z",
          "attribution": "Implied probabilities and resolution status are derived from public Polymarket and Kalshi market data by x402.fenixfoundry.com. Not affiliated with, endorsed by, or a data feed of either venue. Informational only, not investment advice.",
          "resolutionSource": "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",
              "anyOf": [
                {
                  "required": [
                    "q"
                  ]
                },
                {
                  "required": [
                    "venue",
                    "id"
                  ]
                }
              ],
              "properties": {
                "q": {
                  "type": "string",
                  "maxLength": 500,
                  "description": "Natural-language event query, e.g. \"Did the US government shut down in 2026?\". Use this or venue+id."
                },
                "id": {
                  "type": "string",
                  "description": "Direct lookup: Polymarket event slug or Kalshi ticker. Requires venue."
                },
                "venue": {
                  "enum": [
                    "polymarket",
                    "kalshi"
                  ],
                  "type": "string",
                  "description": "Direct lookup: which venue the market lives on. Requires id."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "resolved",
                "outcome",
                "resolvedAt",
                "resolutionSource",
                "venue",
                "url",
                "confidence",
                "attribution"
              ],
              "properties": {
                "id": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "url": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "query": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "venue": {
                  "enum": [
                    "polymarket",
                    "kalshi",
                    null
                  ],
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "outcome": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "description": "Settled outcome as published, e.g. \"Yes\"."
                },
                "resolved": {
                  "type": "boolean",
                  "description": "True once the venue has settled the market."
                },
                "closeTime": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "description": "Scheduled close time for markets that have not settled."
                },
                "confidence": {
                  "type": "number",
                  "description": "0..1 confidence that this market is the event you asked about."
                },
                "resolvedAt": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "attribution": {
                  "type": "string"
                },
                "resolutionSource": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "description": "Venue that published the settlement."
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-17 03:25Z
Last indexed by Roundhouse
2026-09-24 12:10Z
Last enriched (probe, favicon, geo)
2026-09-13 15:45Z
x402 version
2
Max timeout
60s
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. 30 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 market-resolution 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=market-resolution'
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://x402.fenixfoundry.com/resolution, 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.