HTTP.jl how to paralelise HTTP.request

I have multiple RESTAPI workers (aprox 50). I am using HTTP POST to send data and wait for results. I would like to send all 50 request in paralell. I tried using @async and @spawn. With both approaches I came to limit in max parallel tasks up to number of threads/ HT cores.

As workers are stateless I could not take an approach when I first send task to workers and later gather results. I am looking for solution to have 50 HTTP requests running in parallel.