Roundhouse

prediction-prices

Odds/price history for ONE outcome of a prediction market (by id, 0x conditionId or slug): a normalized implied-probability time series plus a momentum summary — change, percent change, min/max, current and trend.

TradingLiveeip155:8453Exactvia cdp
https://api.agentstools.dev/prediction/prices
Prediction-marketsPolymarketPrice-historyOdds-historyTimeseries
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$46.91
Verified settled volume
4,519 settlements proven x402 by their on-chain EIP-3009 marker.
$0.015
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-08 09:48Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493

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": "0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493",
      "amount": "15000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.agentstools.dev/prediction/prices",
    "tags": [
      "prediction-markets",
      "polymarket",
      "price-history",
      "odds-history",
      "timeseries",
      "momentum",
      "probability",
      "trend",
      "forecasting",
      "clob"
    ],
    "mimeType": "application/json",
    "description": "Odds/price history for ONE outcome of a prediction market (by id, 0x conditionId or slug): a normalized implied-probability time series plus a momentum summary — change, percent change, min/max, current and trend.",
    "serviceName": "prediction-prices"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "id": "will-abiy-ahmed-be-the-next-prime-minister-of-ethiopia",
            "interval": "1w"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "id": "will-abiy-ahmed-…",
            "count": 2,
            "points": [
              {
                "p": 0.91,
                "t": 1783706403
              },
              {
                "p": 0.9565,
                "t": 1784310845
              }
            ],
            "context": {
              "outcome": "Yes",
              "interval": "1w",
              "question": "Will Abiy Ahmed be the next PM of Ethiopia?",
              "outcome_index": 0
            },
            "summary": {
              "trend": "up",
              "change": 0.0465,
              "n_points": 2,
              "end_price": 0.9565,
              "max_price": 0.9565,
              "min_price": 0.91,
              "change_pct": 5.11,
              "start_price": 0.91,
              "current_price": 0.9565
            },
            "disclaimer": "Prediction-market data, not financial advice.",
            "money_type": "real"
          }
        }
      },
      "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",
                "required": [
                  "id"
                ],
                "properties": {
                  "id": {
                    "type": "string",
                    "description": "Market/event id: numeric id, 0x conditionId, market-slug or event-slug"
                  },
                  "venue": {
                    "enum": [
                      "polymarket"
                    ],
                    "type": "string",
                    "description": "Venue (default polymarket)"
                  },
                  "outcome": {
                    "type": "string",
                    "description": "Outcome name (e.g. Yes/No) or index; default index 0 (usually Yes)"
                  },
                  "fidelity": {
                    "type": "integer",
                    "minimum": 1,
                    "description": "Resolution in minutes (default per interval)"
                  },
                  "interval": {
                    "enum": [
                      "1h",
                      "6h",
                      "1d",
                      "1w",
                      "1m",
                      "max"
                    ],
                    "type": "string",
                    "description": "History window (default 1d)"
                  }
                }
              }
            },
            "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.

0.015USDC≈ $0.015 USD
on Base · exact scheme

Pay 0.015 USDC on Base to 0xF22e…Ff493. The signed payment is good for 5 minutes.

Paid to
0xF22e…Ff493
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
15000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493",
    "amount": "15000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "id": "0xacec7e5b90ccb1ac4c950e3aff18156d6ce1bb7b0c87c001a281279412dca784",
          "interval": "1w"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "id": "0xacec…",
          "count": 2,
          "points": [
            {
              "p": 0.91,
              "t": 1783706403
            },
            {
              "p": 0.9565,
              "t": 1784310845
            }
          ],
          "context": {
            "outcome": "Yes",
            "interval": "1w",
            "question": "Will Bitcoin reach $95,000 by December 31, 2026?",
            "outcome_index": 0
          },
          "summary": {
            "trend": "up",
            "change": 0.0465,
            "n_points": 2,
            "end_price": 0.9565,
            "max_price": 0.9565,
            "min_price": 0.91,
            "change_pct": 5.11,
            "start_price": 0.91,
            "current_price": 0.9565
          },
          "disclaimer": "Prediction-market data, not financial advice.",
          "money_type": "real"
        }
      }
    },
    "schema": {
      "type": "object",
      "$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",
              "required": [
                "id"
              ],
              "properties": {
                "id": {
                  "type": "string",
                  "description": "Market/event id: numeric id, 0x conditionId, market-slug or event-slug"
                },
                "venue": {
                  "enum": [
                    "polymarket"
                  ],
                  "type": "string",
                  "description": "Venue (default polymarket)"
                },
                "outcome": {
                  "type": "string",
                  "description": "Outcome name (e.g. Yes/No) or index; default index 0 (usually Yes)"
                },
                "fidelity": {
                  "type": "integer",
                  "minimum": 1,
                  "description": "Resolution in minutes (default per interval)"
                },
                "interval": {
                  "enum": [
                    "1h",
                    "6h",
                    "1d",
                    "1w",
                    "1m",
                    "max"
                  ],
                  "type": "string",
                  "description": "History window (default 1d)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-08 09:48Z
Last indexed by Roundhouse
2026-11-07 09:10Z
Last enriched (probe, favicon, geo)
2026-09-24 02:15Z
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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 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 prediction-prices 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-prices'
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.agentstools.dev/prediction/prices, 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.