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Polymarket Orderbook
x402
Polymarket Orderbook is a paid API for AI agents from 164.160.90.241.sslip.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).
Returns live CLOB orderbook data for a Polymarket outcome token, including best bid/ask, midpoint, spread, and full bid/ask ladders.
Price / call$0.05
Success—
StatusUnknown
How this service works
Live Polymarket CLOB orderbook for an outcome token: best bid/ask, midpoint, spread and full bid/ask ladders.
Output
Returns structured orderbook data including the best bid price, best ask price, midpoint price, spread, and the complete bid and ask ladders (price levels and quantities) for the specified Polymarket CLOB outcome token.
Example use cases
Check prediction market price before trading
“I'm thinking about buying the 'Yes' outcome on a Polymarket market — can you pull the live orderbook for token 71321045679652aea97d61089b484e7fde7b37c0f08c1002d0cafc7ac02a87f4 and tell me the best ask price and current spread?”
Monitor liquidity of a Polymarket outcome
“I want to know how liquid this Polymarket token is right now — fetch the full bid/ask ladder for token 0x1234abcd and show me how much depth there is on each side.”
Track midpoint price for arbitrage signal
“Keep checking the midpoint price on Polymarket outcome token 98765xyz and alert me if it diverges significantly from 0.5 — first pull the current orderbook so I can see where it's trading.”
Technical details
Endpoint
GEThttps://164.160.90.241.sslip.io/api/oracle-polymarket-orderbook?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time Polymarket prediction market orderbook data, including depth and spread, for a specific outcome token. Prefer this over general market data APIs when your use case is specifically Polymarket CLOB token pricing, liquidity analysis, or pre-trade price discovery.
Side effects
- Invalid or unknown token_id returns an error or empty orderbook
- Token with no open orders returns empty bid/ask ladders
- Network timeout if Polymarket CLOB API is temporarily unavailable
- Stale data if the underlying Polymarket feed has a brief lag
- Missing token_id query parameter returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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