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Polymarket CLOB Orderbook
x402
Polymarket CLOB Orderbook is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Returns live CLOB orderbook data for a Polymarket outcome token, including top N bids and asks, best bid/ask, mid-price, and spread.
Price / call$0.001
Success—
StatusUnknown
How this service works
Live CLOB orderbook for a Polymarket outcome token. Returns top N bids (highest first), top N asks (lowest first), best bid/ask, mid-price, and spread. Use a clobTokenId from polymarket-market or polymarket-search.
Output
Returns a structured orderbook with top N bids (sorted highest first) and top N asks (sorted lowest first) for the specified Polymarket CLOB outcome token, along with the best bid price, best ask price, mid-price, and spread.
Example use cases
Example prompt
“Pull the live Polymarket orderbook for token ID 12345678 with 20 levels on each side — show me the top bids and asks, best bid/ask, mid-price, and spread.”
Technical details
Endpoint
POSThttps://agent402.tools/api/polymarket-orderbookWhen to prefer
Use this endpoint when you need real-time orderbook depth, liquidity, and pricing information for a specific Polymarket outcome token. Prefer this over general market info endpoints when you need precise bid/ask levels for trading decisions, arbitrage analysis, or market making on Polymarket's CLOB.
Side effects
- Invalid or unknown clobTokenId returns an error or empty orderbook
- Depth value outside 1-50 range may be rejected or clamped
- Polymarket CLOB API unavailable causes upstream timeout
- Payment failure (x402) results in 402 status and no data returned
- Stale or illiquid market may return sparse or empty orderbook levels
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| depth | number | Levels each side to return (1-50, default 10). |
| tokenId | string | CLOB token id (decimal string) from market.clobTokenIds. |
Output
Schema · Response
{
"type": "json",
"example": {
"asks": [
{
"size": 800,
"price": 0.63
},
{
"size": 1200,
"price": 0.64
}
],
"bids": [
{
"size": 1000,
"price": 0.61
},
{
"size": 500,
"price": 0.6
}
],
"asset": "72909...",
"market": "0xabc...",
"source": "polymarket-clob",
"spread": 0.02,
"bestAsk": 0.63,
"bestBid": 0.61,
"tokenId": "72909...",
"midPrice": 0.62,
"timestamp": "1751234567"
}
}Tags
x402
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