Prediction Market Similarity Search

x402

Prediction Market Similarity Search is a paid API for AI agents from api.predictionmarketdata.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns semantically similar prediction markets given a source event ticker identifier.

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Find semantically similar prediction markets given an event_ticker.

Output

A paginated list of semantically similar prediction markets for the given source event ticker, likely including market identifiers, names, exchange info, and similarity signals.

Example use cases

Example prompt

“Show me up to 10 prediction markets that are semantically similar to the event ticker INXU-2024-Q3 on predictionmarketdata.io, starting from the first result.”

Technical details

Endpoint

GEThttps://api.predictionmarketdata.io/prediction-markets/similar

When to prefer

Use this endpoint when you need to discover related or comparable prediction markets based on a known event ticker — ideal for building recommendation feeds, exploring correlated events, or diversifying a prediction market portfolio. Prefer over full-text search when semantic similarity is more important than keyword matching.

Side effects

Invalid or unknown event_ticker returns empty results or 404
Missing required event_ticker parameter returns 400 bad request
limit or offset out of range may return validation error
Payment failure (x402) if USDC balance is insufficient
Rate limiting if too many requests in a short period

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "similar": [
      {
        "score": 0.91,
        "event_ticker": "spurs-vs-knicks-game-3.POLYMARK"
      }
    ]
  }
}

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Technical details

Endpoint

GEThttps://api.predictionmarketdata.io/prediction-markets/similar

When to prefer

Side effects

Invalid or unknown event_ticker returns empty results or 404
Missing required event_ticker parameter returns 400 bad request
limit or offset out of range may return validation error
Payment failure (x402) if USDC balance is insufficient
Rate limiting if too many requests in a short period

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "similar": [
      {
        "score": 0.91,
        "event_ticker": "spurs-vs-knicks-game-3.POLYMARK"
      }
    ]
  }
}