Prediction Metadata

Returns servable Hyperliquid prediction questions and registered open or resolved Polymarket conditions. The predictionMeta WebSocket channel uses the same payload. The standalone outcomeMarkets request has been removed.

Endpoint

POST /info

Request Body

{ "type": "predictionMeta" }

Response

{
  "outcomeMarkets": []
}

Prediction markets

The outcomeMarkets field is an array. Each row preserves its venue’s identity and settlement fields. For example, a Hyperliquid question in that array looks like:

[
  {
    "venue": "hyperliquid",
    "questionId": 820,
    "name": "May CPI year-over-year",
    "description": "One-decimal BLS CPI year-over-year value for May 2026.",
    "fallbackOutcome": 10217,
    "namedOutcomes": [10218],
    "settledNamedOutcomes": [],
    "outcomes": [
      {
        "outcomeId": 10218,
        "name": "Below 4.3%",
        "description": "Resolves Yes if May CPI is below 4.3%.",
        "quoteToken": "USDC",
        "sides": [
          {
            "sideIndex": 0,
            "label": "Yes",
            "assetId": "0004000005f77024",
            "hlEncoding": 100102180,
            "settleFraction": null
          },
          {
            "sideIndex": 1,
            "label": "No",
            "assetId": "0004000005f77025",
            "hlEncoding": 100102181,
            "settleFraction": null
          }
        ]
      }
    ]
  }
]

Polymarket conditions are listed in the same array under venue: "polymarket", one question per condition with one binary outcome. Only open (tradable) and resolved (redeemable) conditions are listed. Names are not stored on the node, so name, description and side label are null:

{
  "venue": "polymarket",
  "questionId": "0xabababababababababababababababababababababababababababababababab",
  "name": null,
  "description": null,
  "lifecycle": "open",
  "outcomes": [
    {
      "conditionId": "0xcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
      "name": null,
      "description": null,
      "quoteToken": "pUSD",
      "sides": [
        {
          "sideIndex": 0,
          "label": null,
          "assetId": "10010000000000000000000000000000000000000000000000000000000000000064",
          "tokenId": "100",
          "settleFraction": null
        },
        {
          "sideIndex": 1,
          "label": null,
          "assetId": "10010000000000000000000000000000000000000000000000000000000000000065",
          "tokenId": "101",
          "settleFraction": null
        }
      ]
    }
  ]
}

Polymarket sides carry tokenId (the venue identity, as hlEncoding is for Hyperliquid) and the outcome carries conditionId (as outcomeId is for Hyperliquid). settleFraction is null before resolution. For a resolved condition with a recorded redemption resolution, it is the stored payout numerator divided by the payout denominator, truncated to 20 decimal places for display. Redemption accounting uses the original exact ratio. If no resolution record is available, the fraction remains null.

Question (Hyperliquid)

Field	Meaning
`venue`	`"hyperliquid"`
`questionId`	Hyperliquid question ID, e.g., `820`
`name`	Question name, e.g., `"May CPI year-over-year"`
`description`	Resolution description
`fallbackOutcome`	Fallback outcome ID, e.g., `10217`
`namedOutcomes`	Outcome IDs belonging to the question, e.g., `[10218]`
`settledNamedOutcomes`	Named outcomes that have settled
`outcomes`	Outcome definitions

Outcome

Field	Meaning
`outcomeId`	Hyperliquid outcome ID, e.g., `10218`
`name`	Outcome name, e.g., `"Below 4.3%"`
`description`	Resolution description
`quoteToken`	Quote token, e.g., `"USDC"`
`sides`	Tradable outcome sides

Side

Field	Meaning
`sideIndex`	Zero-based side index, e.g., `0`
`label`	Human-readable label, e.g., `"Yes"`
`assetId`	16-character AssetId, e.g., `"0004000005f77024"`
`hlEncoding`	Encoded outcome-side ID, e.g., `100102180`
`settleFraction`	Currently `null`; settled sides are filtered out of this response

Use the side’s assetId in the standard Notional order action. Do not send hlEncoding as the order AssetId. Use the outcome’s numeric outcomeId with userOutcome.mergeOutcome to merge an equal number of its Yes and No shares back into USDC. Do not use a side assetId or hlEncoding as the merge outcome ID. Hyperliquid rows include currently servable outcomes. Polymarket rows include registered open or resolved conditions. Either venue can contribute no rows; outcomeMarkets is empty when neither venue has servable markets. This registry does not include unregistered Polymarket discovery results.

Start Here

Info

Analytics

Exchange

WebSocket

Endpoint

Request Body

Response

Prediction markets

Question (Hyperliquid)

Outcome

Side

​Endpoint

​Request Body

​Response

​Prediction markets

​Question (Hyperliquid)

​Outcome

​Side

Endpoint

Request Body

Response

Prediction markets

Question (Hyperliquid)

Outcome

Side