Roundhouse AI

api.predictionmarketdata.io

Hourly prediction market volume and trade activity by exchange. Returns exchange-level metrics such as USD volume, trade count, and raw volume for a requested time range.

TradingLiveeip155:8453Exactvia facilitator:dexter
https://api.predictionmarketdata.io/market-overview
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.
$0.0010
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
Never called
—
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": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.predictionmarketdata.io/market-overview",
    "mimeType": "",
    "description": "Time-bucketed prediction market volume and trade-count by exchange."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "to": "2026-06-08T00:00:00Z",
            "from": "2026-06-07T00:00:00Z",
            "interval": "3600000"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "data": [
              {
                "time": "2026-06-07T00:00:00Z",
                "volume": "4299.0",
                "sourceId": 4008,
                "volumeUsd": "1700.9",
                "entityCode": "GMNI",
                "entityName": "Gemini",
                "tradeCount": 37,
                "instrumentType": "PREDICTION_MARKET"
              }
            ],
            "count": 144,
            "dataType": "prediction-volume-by-exchange"
          }
        }
      },
      "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": [
                  "from",
                  "to",
                  "interval"
                ],
                "properties": {
                  "to": {
                    "type": "string",
                    "description": "UTC end timestamp in ISO-8601 format."
                  },
                  "from": {
                    "type": "string",
                    "description": "UTC start timestamp in ISO-8601 format."
                  },
                  "interval": {
                    "type": "string",
                    "description": "Bucket size in milliseconds (e.g. 300000 = 5m, 3600000 = 1h)."
                  }
                }
              }
            },
            "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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 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
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x995c0abdcd2ad76548e5f7deb54d32549b2b781f",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://api.predictionmarketdata.io/market-overview",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog
2026-09-24 19:42Z
Last indexed by Roundhouse
2026-09-24 21:45Z
Last enriched (probe, favicon, geo)
2026-09-16 20:15Z
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 api.predictionmarketdata.io 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=api.predictionmarketdata.io'
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://api.predictionmarketdata.io/market-overview, 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.