Unified historical orderbook

curl --request GET \
  --url https://api.probsights.com/historical/orderbook \
  --header 'X-API-Key: <api-key>'

import requests

url = "https://api.probsights.com/historical/orderbook"

headers = {"X-API-Key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'X-API-Key': '<api-key>'}};

fetch('https://api.probsights.com/historical/orderbook', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

GET

historical

orderbook

Unified historical orderbook

curl --request GET \
  --url https://api.probsights.com/historical/orderbook \
  --header 'X-API-Key: <api-key>'

import requests

url = "https://api.probsights.com/historical/orderbook"

headers = {"X-API-Key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'X-API-Key': '<api-key>'}};

fetch('https://api.probsights.com/historical/orderbook', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

Unified historical orderbook for Kalshi and Polymarket. Supports interval and unified formats depending on market type.

Request

https://api.probsights.com/historical/orderbook

Query parameters

exchange

string

required

kalshi or polymarket.

market_id

string

required

Venue-native market ID (Kalshi ticker or Polymarket condition / numeric id).

format

string

interval or unified. Defaults based on market type when omitted.

start_time

string

Range start in Unix milliseconds.

end_time

string

Range end in Unix milliseconds.

granularity

string

default:"1m"

Bucket size for range queries: 1m or 5m.

limit

integer

default:"100"

Max rows per page (1–200).

Examples

Polymarket interval market

curl -H "X-API-Key: YOUR_API_KEY" \
  "https://api.probsights.com/historical/orderbook?exchange=polymarket&market_id=2834699&limit=5"

import requests

response = requests.get(
    "https://api.probsights.com/historical/orderbook",
    headers={"X-API-Key": "YOUR_API_KEY"},
    params={"exchange": "polymarket", "market_id": "2834699", "limit": 5},
)

Kalshi bracket market

curl -H "X-API-Key: YOUR_API_KEY" \
  "https://api.probsights.com/historical/orderbook?exchange=kalshi&market_id=KXBTC-26JUL1217-B73375&limit=5"

import requests

response = requests.get(
    "https://api.probsights.com/historical/orderbook",
    headers={"X-API-Key": "YOUR_API_KEY"},
    params={"exchange": "kalshi", "market_id": "KXBTC-26JUL1217-B73375", "limit": 5},
)

Polymarket historical orderbook Arbitrage overview

⌘I

Getting started

Search

Historical

Arbitrage

Whales

Unified historical orderbook

Request

Query parameters

Examples

Polymarket interval market

Kalshi bracket market

​Request

​Query parameters

​Examples

​Polymarket interval market

​Kalshi bracket market

Request

Query parameters

Examples

Polymarket interval market

Kalshi bracket market