Limits

Rate Limits

The API implements rate limiting to ensure fair usage and system stability.

Limits by Category

Endpoint Category	Rate Limit	Window
Authentication	10 requests	per minute
Market Data (read)	100 requests	per minute
Trading (write)	50 requests	per minute
Account Management	30 requests	per minute

Rate Limit Headers

Rate limit information is returned in response headers:

Header	Description
X-RateLimit-Limit	Maximum requests allowed in window
X-RateLimit-Remaining	Remaining requests in current window
X-RateLimit-Reset	Unix timestamp when limit resets
Retry-After	Seconds to wait (only on 429 response)

Example Response Headers

X-RateLimit-Limit: 100
X-RateLimit-Remaining: 95
X-RateLimit-Reset: 1703052700

Handling Rate Limits

When rate limited (HTTP 429), implement exponential backoff:

import time
import requests

def make_request_with_retry(url, headers, max_retries=3):
    for attempt in range(max_retries):
        response = requests.get(url, headers=headers)

        if response.status_code == 429:
            # Use Retry-After header if available
            retry_after = int(response.headers.get("Retry-After", 2 ** attempt))
            print(f"Rate limited. Waiting {retry_after} seconds...")
            time.sleep(retry_after)
            continue

        return response

    raise Exception("Rate limit exceeded after max retries")

Request Size Limits

Limit	Value
Maximum request body size	1 MB
Maximum URL length	8,192 characters
Maximum headers size	16 KB

Batch Limits

Operation	Limit
Order book instruments per request	20
Orders per list request	1,000
Instruments per list request	1,000

Best Practices

1. Cache static data - Venues and instruments change infrequently
2. Use WebSocket for real-time data - Reduces polling overhead
3. Batch requests - Use list endpoints instead of multiple single requests
4. Implement backoff - Respect rate limits with exponential backoff
5. Monitor headers - Track remaining quota to avoid hitting limits