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The ColdSend API enforces rate limits to ensure platform stability and fair usage.

Current Limits

Rate Limit Headers

Every API response includes rate limit information:

Handling Rate Limits

When You Hit the Limit

Status: 429 Too Many Requests

Implementing Exponential Backoff

Best Practices

  1. Batch operations — Space out your requests when processing multiple items
  2. Cache responses — Don’t repeatedly poll the same endpoint. Cache for 5+ minutes.
  3. Use webhooks — For real-time updates, configure webhooks instead of polling
  4. Check remaining requests — Monitor X-RateLimit-Remaining headers 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