# Polymarket CLOB Order Book

> Polymarket CLOB Order Book is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Returns the live central limit order book (bids and asks with price and size) for a specific Polymarket outcome token

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/polymarket-orderbook
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-clob-order-book-e12156eb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DrkvyV_FKfJUmZbMAYzXh

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability polymarket-clob-order-book-e12156eb -d '<json body>'
```

Example prompt: Show me the live order book for Polymarket outcome token 71321045679652173895...  — I want to see the current bids and asks with sizes so I can gauge market depth before placing a trade.

## When to prefer this

Use this endpoint when you need real-time, granular order book data (individual price levels and sizes) for a specific Polymarket outcome token — not just the aggregate odds. Prefer this over Polymarket market detail endpoints when you need to assess liquidity depth, estimate slippage, monitor spreads, or detect order book imbalances. Requires a token_id obtained from the polymarket-market-detail endpoint.

## Known failure modes

- Invalid or unknown token_id returns an error or empty book
- Token_id not obtained from polymarket-market-detail endpoint causes lookup failure
- Payment failure (x402) if USDC balance is insufficient
- Network or proxy timeout if Polymarket CLOB is temporarily unavailable
- Market may be resolved/closed and no longer have an active order book

## How this service works

Live CLOB order book for a Polymarket outcome token: bids and asks with price + size. The real market depth behind the odds. Free Polymarket CLOB data. token_id from polymarket-market-detail.

## Output

A live snapshot of the order book for the specified Polymarket outcome token, including a list of bid price/size pairs and ask price/size pairs representing real resting orders in the CLOB, reflecting current market depth and liquidity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-clob-order-book-e12156eb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)