Node red with microservices

General
3

Thank you for your reply.
I progressed a little bit:
First picture: Flow
So when I go to localhost:1880/weater/London - then I get JSON {"q": "London"} in msg.req.params;
Second picture: My function
Just setting msg.payload with msq.req.parameters (because I thought msg.payload could be used for parameters in my final url)
Third picture:
Thre is option to use msg.payload as parameters - Does not work for me. I deleted from my api: q=London and tried to check "use msg.payload as parameters" - but it does not work.
V%C3%BDst%C5%99i%C5%BEek V%C3%BDst%C5%99i%C5%BEek2 !

So, how can I set q=Location from my msg.payload to my final api URL?

Thanks