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Polymarket Midpoint Prices
web-searchfinancial-dataprediction-marketsweathertraveldata
Polymarket Midpoint Prices is a paid API for AI agents from AIsa MPP Data APIs at api.aisa.one, paid per call via MPP, $0.012/call, status unknown (last checked 2026-10-18).
Retrieves midpoint prices (average of best bid and best ask) for one or more Polymarket prediction market token IDs.
Price / call$0.012
Success—
StatusUnknown
How this service works
Retrieves midpoint prices for multiple token IDs using query parameters. The midpoint is calculated as the average of the best bid and best ask prices. <!-- aisa-pricing:start --> Published reference price: $0.012 USD per successful request. Account-specific pricing and final settlement may differ. <!-- aisa-pricing:end -->
Output
A JSON object mapping each requested token ID (as a string key) to its current midpoint price (as a string value), where the midpoint is the arithmetic mean of the best bid and best ask prices on Polymarket for that token.
Example use cases
Check election outcome probability
“What's the current fair-value midpoint price for Polymarket tokens 71321 and 71322? I want to see what the market implies for each side of the election outcome.”
Monitor arbitrage opportunity across tokens
“Fetch the midpoint prices for these Polymarket token IDs — 88421,88422,88423 — so I can compare them and spot any mispricing between correlated outcomes.”
Build a prediction market dashboard
“Pull the current midpoint prices for all these token IDs: 10011,10012,10013,10014,10015 so I can display the implied probabilities on my dashboard.”
Technical details
Endpoint
GEThttps://api.aisa.one/apis/v1/polymarket/midpoints?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time fair-value pricing for Polymarket prediction market tokens, especially when querying multiple tokens in a single call. Prefer this over individual price lookups when you need batch midpoint calculations. It is ideal for monitoring implied probabilities, building dashboards, or running arbitrage detection across correlated outcomes.
Side effects
- Invalid or malformed token IDs return missing keys or errors in the response map
- Tokens with no active order book may return null or zero midpoint
- Rate limiting or payment failures result in 402/429 errors
- Very large lists of token IDs may cause request timeouts
- Token IDs for expired or resolved markets may return stale or unavailable prices
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token_idsrequired | string | Comma-separated list of token IDs |
Output
Schema · Response
{
"type": "object",
"description": "Map of token ID to midpoint price",
"additionalProperties": {
"type": "string"
}
}Tags
web-searchfinancial-dataprediction-marketsweathertraveldatasearch
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