Add debug.Stack() to Counter?

[guettli]

Debug client: too many API calls

I want to debug where my Go application does too many API requests to a third party service. The service has rate limits and I want to avoid to hit this limit.

Unfortunately I am not very familiar with the code base.

Is there a way to solve this with Prometheus client Go, so that I see which lines of the Go code do requests to the API?

My client uses the standard http package.

I can inject an own transport. This works fine. This way I was able to log all outgoing requests.

Now I could use debug.Stack() but afaik only labels are supported. Can I add the current stack trace while incrementing a counter?