Quick Start

Overview

The Xmarket API provides programmatic access to:

• Real-time orderbook data
• Order creation and management
• Market information
• Position tracking
• Trading operations

Base URLs

The API uses two base URLs depending on the endpoint type:

• Public endpoints (read-only, no authentication required):

  https://engine.xmarket.app/api/v1

  Used for: Markets, Orderbook data

• Authenticated endpoints (require API key):

  https://engine.xmarket.app/openapi/v1

  Used for: Orders, Positions, Trading operations

Prerequisites

Before you begin, you'll need:

1. An Xmarket account
2. An API key for authentication

Getting Your API Key

Step 1: Register an Account

Visit Xmarket and create your account if you haven't already.

Step 2: Generate API Key

1. Navigate to your account Settings page
2. Find the API Management section
3. Click Generate New API Key
4. Store your API key securely!

danger

Important: Keep your API key secure and never share it publicly or commit it to version control.

Authentication

All API requests require authentication using your API key in the x-api-key header:

x-api-key: YOUR_API_KEY

Making Your First Request

Let's start with a simple request to fetch orderbook data:

cURL

curl -X GET \
  'https://engine.xmarket.app/api/v1/orderbook/{outcomeId}' \
  -H 'x-api-key: YOUR_API_KEY'

Javascript

const API_KEY = 'YOUR_API_KEY';
const BASE_URL = 'https://engine.xmarket.app/api/v1';

async function getOrderbook(outcomeId) {
  const response = await fetch(
    `${BASE_URL}/orderbook/${outcomeId}`,
    {
      method: 'GET',
      headers: {
        'x-api-key': API_KEY,
        'Content-Type': 'application/json'
      }
    }
  );

  if (!response.ok) {
    throw new Error(`HTTP error! status: ${response.status}`);
  }

  return await response.json();
}

// Example usage
getOrderbook('outcome-id')
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

Python

import requests

API_KEY = 'YOUR_API_KEY'
BASE_URL = 'https://engine.xmarket.app/api/v1'

def get_orderbook(outcome_id):
    headers = {
        'x-api-key': API_KEY,
        'Content-Type': 'application/json'
    }

    response = requests.get(
        f'{BASE_URL}/orderbook/{outcome_id}',
        headers=headers
    )

    response.raise_for_status()
    return response.json()

# Example usage
try:
    orderbook = get_orderbook('outcome-id')
    print(orderbook)
except requests.exceptions.RequestException as e:
    print(f'Error: {e}')

Error Handling

The API uses standard HTTP status codes to indicate success or failure:

Status Code	Description
200	Success
201	Resource created
400	Bad Request - Invalid parameters
401	Unauthorized - Invalid or missing API key
404	Not Found - Resource doesn't exist
500	Internal Server Error

Error responses include a message explaining what went wrong:

{
  "message": "Invalid market ID"
}

Rate Limits

To ensure fair usage and system stability, the API implements rate limiting:

• Default limit: 100 requests per minute per API key

When you exceed the rate limit, you'll receive a 429 Too Many Requests response.

Next Steps

Now that you're set up, explore our detailed API documentation:

• Markets API - Browse and search prediction markets
• Orderbook API - View real-time market depth
• Orders API - Create, cancel, and manage orders
• Positions API - Track your trading positions

Support

If you encounter any issues or have questions:

• Check our FAQs
• Contact support through the platform