# Rate limiting

We enforce a rate limit on how many HTTP requests can be made in a  given period. When the limit is reached, our PSD2 API will return an error `429 Too Many Requests`.

To allow you to handle this rate limiting in a programmatic way, the following headers are sent along every response: 
- `RateLimit-Limit`: total number of available requests between two quota resets;
- `RateLimit-Remaining`: number of available requests until the quota is reset;
- `RateLimit-Reset`: time remaining (in seconds) until the quota is reset.