CLOB Read (Public)

Get Prices Batch

Get prices for multiple tokens in one request.

Public endpoint — no authentication required.

PolySim {"token_ids": ["TOKEN_A", "TOKEN_B"]} → returns {"TOKEN_A": "0.52", "TOKEN_B": "0.74"}.
Polymarket [{"token_id": "TOKEN_A", "side": "BUY"},...] (py-clob-client / clob-rust shape) → returns {"TOKEN_A": {"BUY": "0.52"}, "TOKEN_B": {"BUY": "0.74"}}.

The PM-shape response shape mirrors PM exactly (per docs.polymarket.com/trading/orderbook §Batch Requests). The simulator returns the cached outcome price for both BUY and SELL — separate bid/ask aren’t held in the price cache, so PM porters get the correct response shape (no more 422) but the BUY/SELL values are the same midpoint. Use single-token GET /v1/price?token_id=...&side=... when you need a true best-bid / best-ask off the live book.

POST

prices

Get Prices Batch

curl --request POST \
  --url https://api.polysimulator.com/v1/prices \
  --header 'Content-Type: application/json' \
  --data '
{
  "token_ids": [
    "<string>"
  ]
}
'

import requests

url = "https://api.polysimulator.com/v1/prices"

payload = { "token_ids": ["<string>"] }
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({token_ids: ['<string>']})
};

fetch('https://api.polysimulator.com/v1/prices', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.polysimulator.com/v1/prices",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'token_ids' => [
        '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.polysimulator.com/v1/prices"

	payload := strings.NewReader("{\n  \"token_ids\": [\n    \"<string>\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.polysimulator.com/v1/prices")
  .header("Content-Type", "application/json")
  .body("{\n  \"token_ids\": [\n    \"<string>\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.polysimulator.com/v1/prices")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"token_ids\": [\n    \"<string>\"\n  ]\n}"

response = http.request(request)
puts response.read_body

{}

{
  "error": "<string>",
  "message": "<string>",
  "details": {},
  "request_id": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "details": {},
  "request_id": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "details": {},
  "request_id": "<string>"
}

Body

application/json

BatchTokenPriceRequest · object
PmBatchPriceItem · object[]

Accepts BOTH shapes: (1) PolySim {"token_ids": ["..."]} → returns {token_id: price_str}; (2) Polymarket [{"token_id": "...", "side": "BUY|SELL"}, ...] → returns {token_id: {SIDE: price_str}} (mirrors py-clob-client.get_prices()). Both shapes cap at 500 items per request.

token_ids

string[]

required

Required array length: 1 - 500 elements

Response

Successful Response

Response Getprices
Response Getprices

{key}

string

Get MidpointGet the order-book midpoint for a single token. Public endpoint — no authentication required. Mirrors Polymarket's `GET /midpoint?token_id=...`.

Get Prices Batch

curl --request POST \
  --url https://api.polysimulator.com/v1/prices \
  --header 'Content-Type: application/json' \
  --data '
{
  "token_ids": [
    "<string>"
  ]
}
'

import requests

url = "https://api.polysimulator.com/v1/prices"

payload = { "token_ids": ["<string>"] }
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({token_ids: ['<string>']})
};

fetch('https://api.polysimulator.com/v1/prices', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.polysimulator.com/v1/prices",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'token_ids' => [
        '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.polysimulator.com/v1/prices"

	payload := strings.NewReader("{\n  \"token_ids\": [\n    \"<string>\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.polysimulator.com/v1/prices")
  .header("Content-Type", "application/json")
  .body("{\n  \"token_ids\": [\n    \"<string>\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.polysimulator.com/v1/prices")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"token_ids\": [\n    \"<string>\"\n  ]\n}"

response = http.request(request)
puts response.read_body

{}

{
  "error": "<string>",
  "message": "<string>",
  "details": {},
  "request_id": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "details": {},
  "request_id": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "details": {},
  "request_id": "<string>"
}

Overview

Endpoints

Get Prices Batch

Body

Response