When an application exceeds the rate limit for a given API endpoint, the API will return a HTTP 429 “Too Many Requests” response code.
1. Concurrent API request limits (Production server)
The following table lists the limits per package for concurrent requests (calls) with a duration of 20 seconds or longer.
| Package | Limit |
|---|---|
| Starter | 1 |
| Advanced | 2 |
| Enterprise | 3 |
| Unlimited | 5 |
2. Total API request limits (Production server)
The following table lists the limits for the total API requests (calls) per 24-hour period.
| Package | Limit |
|---|---|
| Starter | 1.000 |
| Advanced | 10.000 |
| Enterprise | 25.000 |
| Unlimited | 50.000 |
3. API request limits (Sandbox server)
All API requests have the same limitations for any package: 1 request per second and 5000 (1000) requests per day.
4. Fair-use policy
All API usage is bound by a fair-use policy and is aimed to generate bookings. We reserve the right to change the limitations and to limit or close API access at any time, should we see abusive behaviour or should the API affect the overall system stability.
5. Get a higher limit
If your API usage requires more calls than your package allows, contact our Support Team and ask for an upgrade.
6. An alternative to frequent API calls
Consider using Webhooks to avoid too many API calls.