Https calls are not connecting to server

Question

I am working on Windows Service in visual studio 2017. In the rest api\'s call, getting exceptions while debugging code. Sometimes first 2 3 calls working after

Answer 1

The inner error of that 503 is:

The remote server returned an error: (429)

HTTP 429 indicates too many requests. Maybe your upstream server can’t process all requests sent.

This can happen when you reached rate limiting / throttling value if you’re calling a third party API.

UPDATE

As per page 28 in the API docs, you could configure throttling when creating a new API. Check if the throttling is too small or maybe turn off the throttling and see if that could fix the error?