Get a Polymarket order book

Try in Playground

Retrieve the live order book for one outcome token: every bid and ask level as the CLOB serves it, the best bid and ask, tick size, minimum order size and last trade price.

GET/v1/polymarket/orderbookx-api-key

Headers

Get your API key

x-api-keystringrequiredheader

Your ScrapeAtlas customer key. Create one on /account/ and set SCRAPEATLAS_API_KEY.

Query parameters

tokenIdstringquery

Outcome token ID (the CLOB asset ID, decimal). Use tokenId or market, not both.

marketstringquery

Market slug, numeric market ID, condition ID (0x plus 64 hex characters), or a polymarket.com/event/<event>/<market> or /market/<slug> URL. An event URL without a market segment selects the single market that shares the event slug. Use with outcome to pick an outcome token.

min 1 chars · max 600 chars

Exampleexample-candidate-wins-2028

outcomestringquery

Outcome name when market is used, such as Yes or No (case-insensitive). Defaults to the market’s first outcome.

min 1 chars · max 100 chars

ExampleYes

Response fields

requestIdstring

Request correlation UUID.

Upstream requests, decoded response bytes and elapsed milliseconds.

accounting.upstreamRequestsinteger

Always included.

≥ 0

accounting.responseBytesinteger

Always included.

≥ 0

accounting.durationMsnumber

Always included.

≥ 0

successboolean

True when usable data is returned; inspect status and coverage for omissions.

statusenum

success, partial, failed or challenged. HTTP 200 can be partial.

one of: success, partial

sourceUrlstring

Public Polymarket page the data describes, or the public API URL when no page exists (an order book or price history requested by token ID).

absolute HTTPS URL

fetchedAtstring

UTC retrieval time.

complete is false when a warning names an omission, such as market_limit, level_limit, point_limit, comment_row_limit or stats_unavailable.

coverage.sourcestring

Always included.

coverage.completeboolean

Always included.

coverage.warningsstring[]

Always included.

tokenIdstring

Outcome token ID (the CLOB asset ID, decimal). Use tokenId or market, not both.

outcomestringoptional

Outcome name when market is used, such as Yes or No (case-insensitive). Defaults to the market’s first outcome.

The CLOB book: market (condition ID), asset_id (token ID), timestamp (milliseconds, string), hash, bids, asks, min_order_size, tick_size, neg_risk and last_trade_price. Prices and sizes are decimal strings.

book.marketstring

Always included.

book.asset_idstring

Always included.

book.timestampstring

Always included.

book.hashstring

Always included.

up to 1000 items

book.bids.pricestring

Always included.

book.bids.sizestring

Always included.

up to 1000 items

book.asks.pricestring

Always included.

book.asks.sizestring

Always included.

book.min_order_sizestringoptional

Optional.

book.tick_sizestringoptional

Optional.

book.neg_riskbooleanoptional

Optional.

book.last_trade_pricestringoptional

Optional.

Always included.

bestBid.pricestring

Always included.

bestBid.sizestring

Always included.

bestAsk.pricestring

Always included.

bestAsk.sizestring

Always included.

HTTP 200 returns the success variant. Check status: partial means usable data with warnings, and failed or challenged requests carry a failure object described in Errors & responses.

Error codes

HTTP	failure.code	Meaning
200	`partial`	Usable data with level_limit, point_limit, market_limit, comment_row_limit or *_unavailable warnings.
400	`invalid_request`	Missing, duplicate, conflicting, unsafe or unsupported parameters, a URL outside polymarket.com, or a cursor the source rejects.
401	`unauthorized`	Missing or invalid worker API key.
404	`not_found`	Unknown event, market, outcome, token, series, handle or wallet.
429	`upstream_rate_limited`	Polymarket throttled the request; no automatic retry.
502	`upstream_challenged`	Polymarket rejected the request or answered with a challenge page.
502	`unsupported_page`	Malformed, mismatched or non-JSON source data, or a profile page without its wallet address.
502	`response_too_large` `payload_too_complex`	Response exceeded byte or parsing limits.
502	`unsafe_redirect` `request_limit` `upstream_error`	Bounded source retrieval could not complete.
503	`busy`	All worker slots and queue places are occupied.
504	`timeout`	Total request deadline expired.

Code example

curl "https://api.scrapeatlas.com/v1/polymarket/orderbook?market=example-candidate-wins-2028&outcome=Yes" \
  -H "x-api-key: YOUR_API_KEY"

const response = await fetch(
  "https://api.scrapeatlas.com/v1/polymarket/orderbook?market=example-candidate-wins-2028&outcome=Yes",
  {
    headers: {
      "x-api-key": "YOUR_API_KEY"
    }
  }
);

const data = await response.json();
console.log(data.status, data);

type Result = {
  status: "success" | "partial" | "failed" | "challenged";
  requestId: string;
  [field: string]: unknown;
};

const response = await fetch(
  "https://api.scrapeatlas.com/v1/polymarket/orderbook?market=example-candidate-wins-2028&outcome=Yes",
  {
    headers: {
      "x-api-key": process.env.SCRAPEATLAS_API_KEY!
    }
  }
);

const data = (await response.json()) as Result;
if (data.status === "failed" || data.status === "challenged") {
  throw new Error(`Polymarket request failed: ${data.requestId}`);
}
console.log(data);

import requests

response = requests.get(
    "https://api.scrapeatlas.com/v1/polymarket/orderbook",
    headers={"x-api-key": "YOUR_API_KEY"},
    params={
        "market": "example-candidate-wins-2028",
        "outcome": "Yes"
    },
    timeout=60,
)
data = response.json()
print(data["status"], data)

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.scrapeatlas.com/v1/polymarket/orderbook?market=example-candidate-wins-2028&outcome=Yes", nil)
	req.Header.Set("x-api-key", "YOUR_API_KEY")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	var data map[string]interface{}
	json.NewDecoder(resp.Body).Decode(&data)
	fmt.Println(data["status"], data)
}

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        var client = HttpClient.newHttpClient();
        var request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.scrapeatlas.com/v1/polymarket/orderbook?market=example-candidate-wins-2028&outcome=Yes"))
            .GET()
            .header("x-api-key", "YOUR_API_KEY")
            .build();
        var response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}

Use your sa_live_… customer key at https://api.scrapeatlas.com.

Responses

Successful result. Synthetic example validated against the runtime contract.

{
  "success": true,
  "status": "success",
  "requestId": "00000000-0000-4000-8000-000000000001",
  "sourceUrl": "https://polymarket.com/event/presidential-election-winner-2028/example-candidate-wins-2028",
  "fetchedAt": "2026-10-13T00:00:00.000Z",
  "coverage": {
    "source": "public_api",
    "complete": true,
    "warnings": []
  },
  "accounting": {
    "upstreamRequests": 2,
    "responseBytes": 10030,
    "durationMs": 262
  },
  "tokenId": "714600000000000000000000000000000000000000000000000000000000000000000000001001",
  "outcome": "Yes",
  "book": {
    "market": "0x3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a3a",
    "asset_id": "714600000000000000000000000000000000000000000000000000000000000000000000001001",
    "timestamp": "1791887888316",
    "hash": "38d22fa084c768e1a6271a4863972c6e5fbd8550",
    "bids": [
      {
        "price": "0.60",
        "size": "2500"
      },
      {
        "price": "0.61",
        "size": "1200"
      }
    ],
    "asks": [
      {
        "price": "0.64",
        "size": "900"
      },
      {
        "price": "0.63",
        "size": "1500"
      }
    ],
    "min_order_size": "5",
    "tick_size": "0.01",
    "neg_risk": true,
    "last_trade_price": "0.620"
  },
  "bestBid": {
    "price": "0.61",
    "size": "1200"
  },
  "bestAsk": {
    "price": "0.63",
    "size": "1500"
  }
}

Missing, duplicate, conflicting, unsafe or unsupported parameters, a URL outside polymarket.com, or a cursor the source rejects.

{
  "requestId": "9d2f1c0a-6b1e-4c7d-9a8e-2f3b4c5d6e7f",
  "accounting": {
    "upstreamRequests": 0,
    "responseBytes": 0,
    "durationMs": 0
  },
  "success": false,
  "status": "failed",
  "failure": {
    "code": "invalid_request",
    "message": "Invalid request: missing, duplicate, unsupported or malformed parameters."
  }
}