Current Limits
| Limit | Value |
|---|---|
| Requests per minute | 100 |
| Requests per hour | 1,000 |
Rate Limit Headers
Every API response includes rate limit information:| Header | Description |
|---|---|
X-RateLimit-Limit | Maximum requests per window |
X-RateLimit-Remaining | Requests remaining |
X-RateLimit-Reset | Unix timestamp when window resets |
Handling Rate Limits
When You Hit the Limit
Status:429 Too Many Requests
Implementing Exponential Backoff
- Python
- JavaScript
Best Practices
- Batch operations — Space out your requests when processing multiple items
- Cache responses — Don’t repeatedly poll the same endpoint. Cache for 5+ minutes.
- Use webhooks — For real-time updates, configure webhooks instead of polling
- Check remaining requests — Monitor
X-RateLimit-Remainingheaders before bulk operations
Contacting Support
If you need higher rate limits, contact support@coldsend.pro with:- Your account ID
- Expected request volume
- Detailed use case description

