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Polymarket Midpoint Price
x402
Polymarket Midpoint Price is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns the midpoint price (implied probability 0–1) for a Polymarket outcome token from the live CLOB order book
Price / call$0.05
Success—
StatusUnknown
How this service works
Midpoint price (implied probability, 0-1) for a Polymarket outcome token from the live order book. Free Polymarket CLOB data. token_id from polymarket-market-detail.
Output
A numeric midpoint price between 0 and 1 representing the implied probability of the outcome, derived from the live Polymarket CLOB order book (mid-point between best bid and best ask).
Example use cases
Check election outcome probability
“What's the live Polymarket probability right now for the 'Yes' outcome on the 2024 US presidential election market? Give me the midpoint price for token ID 71321057495192610898174985455085197958934673310580272847596498780490842282082.”
Monitor a sports prediction market
“I want to know the current implied odds from Polymarket's order book for whether the Chiefs win the Super Bowl — can you pull the midpoint price for that outcome token?”
Arbitrage probability check
“Pull the live Polymarket midpoint price for both the Yes and No tokens on this crypto price prediction market so I can see if there's a mispricing — token IDs are 12345 and 67890.”
Technical details
Endpoint
POSThttps://proxy.suverse.io/v1/data/polymarket-midpoint-priceWhen to prefer
Use this endpoint when you need a real-time, live order-book-derived probability for a specific Polymarket outcome token and already have the token_id (obtainable from polymarket-market-detail). Prefer this over scraping Polymarket's UI or using cached data sources when you need the freshest possible implied probability for trading, monitoring, or display purposes.
Side effects
- Invalid or unknown token_id returns an error or empty result
- Stale or illiquid markets may have wide spreads making the midpoint less reliable
- Payment failure (x402) if USDC balance is insufficient
- Network or Polymarket API downtime causing fetch failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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