How to add request query string Parameters to my Azure API operation to make it more user friendly?

If your API operation uses URL template parameters, the client system must call it with parameter values specified in the correct position, like:

https://.../exchange-rate/USD/EUR/2020-10-10

The above URL is nice and short. But it confuses users: Is the rate for from USD to EUR or from EUR to UDS?

To avoid he confusion, you change the URL signature to use query string parameters, like

https://.../exchange-rate?from=USD&to=EUR&date=2020-10-10

One big advantage of query string parameters is that their position order is not important. So the following 3 URL are identical:

https://.../exchange-rate?from=USD&to=EUR&date=2020-10-10
https://.../exchange-rate?to=EUR&date=2020-10-10&from=USD
https://.../exchange-rate?date=2020-10-10&from=USD&to=EUR

Here are steps to create template parameters:

1. Go to the publisher portal of the API Management Service.

2. Open the "First API" and add a new operation "Get exchange rate #2".

3. Enter the following to create the operation:

HTTP verb: GET
URL template: /exchange-rate
Rewrite URL template: /currency-exchange
Display name: Get Exchange Rate #2

4. Click "Parameters" on the left. You see parameter fields displayed.

5. Click "ADD QUERY PARAMETER" repeatedly to enter 3 parameters:

NAME   DESCRIPTION          TYPE     VALUES       REQUIRED
from   From-currency code   string   USD          x
to     To-currency code     string   EUR          x
date   From-currency code   string   2020-10-10   x

The picture below shows you how to create request query string parameters for an API operation:

⇒Making API More User Friendly

⇒⇒Microsoft Azure API Management Tutorials