Why are limit headers not always showing on a request?

The reason why response headers are not always present in the API responses is that, in some cases, we are unaware of their specific usage or requirements. To ensure that we promptly respond to your API calls and avoid unnecessary delays, we choose to provide a response without including the response headers. This decision is made with the intention of optimizing the operation of our API. By selectively excluding the inclusion of response headers in every request, we can enhance the overall performance and efficiency of the API.

To provide clarity and transparency regarding the absence of response headers, we have documented this behavior on our official documentation page, which can be found at https://docs.coinapi.io/market-data/rest-api#request-limit--apikey