API with different token name did not work ( Web.Contents function)

[Do5779]

Hi Experts,

I am searching for hours, watching tutorials and also have no idea how to get the right answer. So I hope you can help me:

I want to get the informations of this website per API: Documentation | Exchange Rates API,
e.g. for the latest prices. So thats the documentation: 

https://api.exchangeratesapi.io/v1/latest
    ? access_key = API_KEY
    & base = USD
    & symbols = GBP,JPY,EUR

At first I try to connect the Webservice with the surface of power BI, but this didn't work because of the name of the key ( access_key) instead of Authorization. Now my plan was to take the code, how it was offerd in the blog (Power Query Web.Contents cheat sheet walkthrough | by Oscar Martinez | PowPCo) at Example No. 5 but i don't get it. How I can adress the freaking name of the token?

It seems to me something like :

let

Source = Json.Document(
        Web.Contents(
            "https://api.exchangeratesapi.io/v1/latest",
            [
Query = [
access_key = "123"

]])),

in
    Source

  or

let
    Source = Json.Document(Web.Contents(
        "https://api.exchangeratesapi.io/v1/latest",

        Query =[

    ApiKeyName="access_key",
    apikey = "123"
        ]
  
  ))

in 
     Source

In this solution I should only set the "Key Name" and set the Key at the login screen. But It also did not work. Is the key incorrect or did I some mistakes?

Get Data through API - Microsoft Power BI Community

Code: 

let
    Source = Json.Document(Web.Contents(
        "https://api.exchangeratesapi.io/v1/latest",

      [

    ApiKeyName="? access_key"]
        
  
  ))
        
    
in 
     Source

Screen:

The Key "123" is only for the understanding.

Thanks a lot 😭

[lbendlin]

Your first option is most appropriate but you are missing the other query components. You need to supply base and symbols too.