Hi ckarmy,

Yup. From the documentation:

We do enforce a small amount of rate limiting. Our current limits are 40 requests every 10 seconds and are limited by IP address, not API key. You can use the 'X-RateLimit' headers that get returned with every request to keep track of your current limits. If you exceed the limit, you will receive a 429 HTTP status with a 'Retry-After' header. As soon your cool down period expires, you are free to continue making requests.

Cheers.