Roundhouse

Prediction markets, Polymarket

Prediction markets, Polymarket. Polymarket events (one question with one or several markets, such as an election with many candidates): the busiest open events by 24-hour volume or those matching a search, with volume, liquidity, end date, tags, the number of open markets and the five leading outcomes by price. Use to see who leads a multi-candidate market or to browse what is being traded now.

SearchLiveeip155:8453Exactvia cdp
https://agent-data-tools.revmesh2074.workers.dev/polymarket/events
Polymarket-eventsPrediction-marketsPolymarketElection-oddsOdds
Settlements · 30d
872
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$7.61
Verified settled volume
873 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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 2026-11-10 21:05Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x6293ded2684F1A76E26bEcef87c137D691Fbf800

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.

{
  "hint": "Try it free: add trial=1 to this request (25 free successful calls per caller). Paid x402 tool. x402 v2 clients: terms in the PAYMENT-REQUIRED header, pay with PAYMENT-SIGNATURE (for example @x402/fetch or AgentCash). x402 v1 clients: terms in this body, pay with X-PAYMENT. No wallet? Pay $1 by card in one step at https://buy.stripe.com/fZufZhdSGgq3bFU5MNbII06 (1,000 credits, about 100 calls at $0.01; the key is shown right after payment; other packs at https://agent-data-tools.revmesh2074.workers.dev/credits), then send the key as Authorization: Bearer adt_… or, if your client can only fetch a URL, add &api_key=adt_… to this URL. Free example output: add sample=1. Free docs: https://agent-data-tools.revmesh2074.workers.dev/llms.txt",
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x2074C40346Ae2A90e0E4A391bceE6F16BF5277f5",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://agent-data-tools.revmesh2074.workers.dev/polymarket/events",
      "description": "Polymarket events (one question with one or several markets, such as an election with many candidates): the busiest open events by 24-hour volume or those matching a search, with volume, liquidity, end date, tags, the number of open markets and the five leading outcomes by price. Use to see who leads a multi-candidate market or to browse what is being traded now.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "q": {
              "type": "string",
              "required": false,
              "description": "Optional search, e.g. president 2028; without it the busiest events by 24h volume"
            },
            "limit": {
              "type": "integer",
              "required": false,
              "description": "Events to return, 1-10 (default 5)"
            }
          },
          "discoverable": true
        },
        "output": {
          "note": "Polymarket public data at call time; prices are the market's implied probability (0-1). Not financial advice.",
          "count": 1,
          "query": "president",
          "events": [
            {
              "url": "https://polymarket.com/event/republican-presidential-nominee-2028",
              "slug": "republican-presidential-nominee-2028",
              "tags": [
                "Politics"
              ],
              "title": "Republican Presidential Nominee 2028",
              "volume": 727850358.28,
              "endDate": "2028-11-08T04:59:00Z",
              "leading": [
                {
                  "slug": "will-jd-vance-win-the-2028-republican-presidential-nomination",
                  "title": "J.D. Vance",
                  "yesPrice": 0.52,
                  "volume24h": 300000
                }
              ],
              "liquidity": 32474302.97,
              "volume24h": 2470204.52,
              "openMarkets": 128
            }
          ],
          "checkedAt": "2026-11-05T16:40:00.000Z"
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x2074C40346Ae2A90e0E4A391bceE6F16BF5277f5",
      "scheme": "exact",
      "network": "polygon",
      "mimeType": "application/json",
      "resource": "https://agent-data-tools.revmesh2074.workers.dev/polymarket/events",
      "description": "Polymarket events (one question with one or several markets, such as an election with many candidates): the busiest open events by 24-hour volume or those matching a search, with volume, liquidity, end date, tags, the number of open markets and the five leading outcomes by price. Use to see who leads a multi-candidate market or to browse what is being traded now.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "q": {
              "type": "string",
              "required": false,
              "description": "Optional search, e.g. president 2028; without it the busiest events by 24h volume"
            },
            "limit": {
              "type": "integer",
              "required": false,
              "description": "Events to return, 1-10 (default 5)"
            }
          },
          "discoverable": true
        },
        "output": {
          "note": "Polymarket public data at call time; prices are the market's implied probability (0-1). Not financial advice.",
          "count": 1,
          "query": "president",
          "events": [
            {
              "url": "https://polymarket.com/event/republican-presidential-nominee-2028",
              "slug": "republican-presidential-nominee-2028",
              "tags": [
                "Politics"
              ],
              "title": "Republican Presidential Nominee 2028",
              "volume": 727850358.28,
              "endDate": "2028-11-08T04:59:00Z",
              "leading": [
                {
                  "slug": "will-jd-vance-win-the-2028-republican-presidential-nomination",
                  "title": "J.D. Vance",
                  "yesPrice": 0.52,
                  "volume24h": 300000
                }
              ],
              "liquidity": 32474302.97,
              "volume24h": 2470204.52,
              "openMarkets": 128
            }
          ],
          "checkedAt": "2026-11-05T16:40:00.000Z"
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "related": [
    {
      "url": "https://agent-data-tools.revmesh2074.workers.dev/token-report",
      "name": "Honeypot token check, token risk",
      "price": "$0.01"
    },
    {
      "url": "https://agent-data-tools.revmesh2074.workers.dev/token",
      "name": "Token info, Base ERC-20 facts",
      "price": "$0.01"
    },
    {
      "url": "https://agent-data-tools.revmesh2074.workers.dev/wallet-audit",
      "name": "Wallet risk check",
      "price": "$0.01"
    }
  ],
  "resource": {
    "url": "https://agent-data-tools.revmesh2074.workers.dev/polymarket/events",
    "tags": [
      "polymarket-events",
      "prediction-markets",
      "polymarket",
      "election-odds",
      "odds"
    ],
    "iconUrl": "https://agent-data-tools.revmesh2074.workers.dev/logo.png",
    "mimeType": "application/json",
    "description": "Prediction markets, Polymarket. Polymarket events (one question with one or several markets, such as an election with many candidates): the busiest open events by 24-hour volume or those matching a search, with volume, liquidity, end date, tags, the number of open markets and the five leading outcomes by price. Use to see who leads a multi-candidate market or to browse what is being traded now.",
    "serviceName": "Prediction markets, Polymarket"
  },
  "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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x6293…bf800. The signed payment is good for 5 minutes.

Paid to
0x6293…bf800
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
10000units
on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x6293…bf800
Token contract
0x3c49…c3359
Payment window
5 minutes
10000units
on Arbitrum · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x6293…bf800
Token contract
0xaf88…e5831
Payment window
5 minutes
10000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
82wfSC…fa9Q6
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6293ded2684F1A76E26bEcef87c137D691Fbf800",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6293ded2684F1A76E26bEcef87c137D691Fbf800",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6293ded2684F1A76E26bEcef87c137D691Fbf800",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
    },
    "payTo": "82wfSCZhCmZA7zwqqt6Q3FG8nqYBwUvbThP6M97fa9Q6",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "q": "president"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "note": "Polymarket public data at call time; prices are the market's implied probability (0-1). Not financial advice.",
          "count": 1,
          "query": "president",
          "events": [
            {
              "url": "https://polymarket.com/event/republican-presidential-nominee-2028",
              "slug": "republican-presidential-nominee-2028",
              "tags": [
                "Politics"
              ],
              "title": "Republican Presidential Nominee 2028",
              "volume": 727850358.28,
              "endDate": "2028-11-08T04:59:00Z",
              "leading": [
                {
                  "slug": "will-jd-vance-win-the-2028-republican-presidential-nomination",
                  "title": "J.D. Vance",
                  "yesPrice": 0.52,
                  "volume24h": 300000
                }
              ],
              "liquidity": 32474302.97,
              "volume24h": 2470204.52,
              "openMarkets": 128
            }
          ],
          "checkedAt": "2026-11-05T16:40:00.000Z"
        }
      }
    },
    "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": [],
              "properties": {
                "q": {
                  "type": "string",
                  "examples": [
                    "president"
                  ],
                  "description": "Optional search, e.g. president 2028; without it the busiest events by 24h volume"
                },
                "limit": {
                  "type": "integer",
                  "examples": [
                    3
                  ],
                  "description": "Events to return, 1-10 (default 5)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "note": {
                  "type": "string"
                },
                "count": {
                  "type": "number"
                },
                "query": {
                  "type": "string"
                },
                "events": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "url": {
                        "type": "string"
                      },
                      "slug": {
                        "type": "string"
                      },
                      "tags": {
                        "type": "array",
                        "items": {
                          "type": "string"
                        }
                      },
                      "title": {
                        "type": "string"
                      },
                      "volume": {
                        "type": "number"
                      },
                      "endDate": {
                        "type": "string"
                      },
                      "leading": {
                        "type": "array",
                        "items": {
                          "type": "object",
                          "properties": {
                            "slug": {
                              "type": "string"
                            },
                            "title": {
                              "type": "string"
                            },
                            "yesPrice": {
                              "type": "number"
                            },
                            "volume24h": {
                              "type": "number"
                            }
                          }
                        }
                      },
                      "liquidity": {
                        "type": "number"
                      },
                      "volume24h": {
                        "type": "number"
                      },
                      "openMarkets": {
                        "type": "number"
                      }
                    }
                  }
                },
                "checkedAt": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "bc_09e30bdm"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  }
}

Provenance

Seen in the source catalog
2026-11-10 21:05Z
Last indexed by Roundhouse
2026-11-11 07:50Z
Last enriched (probe, favicon, geo)
2026-11-06 23:16Z
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

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 Prediction markets, Polymarket 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=Prediction%20markets%2C%20Polymarket'
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://agent-data-tools.revmesh2074.workers.dev/polymarket/events, 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.