"Variable \"$id\" of required type \"ID!\" was not provided."

Question

I am trying to query by passing the variable id in the query variable window. This results in an error "Variable \"$id\" of required type \"ID!\" was not provided."

When I run a different query without passing a variable in the query variable section it successfully returns results.

Why does one produce an error, but not the other?

Answer 1

You have to select the QUERY VARIABLES tab, and put the variable value there. You can check that in the attached image.

Answer 2

In the first screenshot you've typed JSON into the "HTTP Headers" tab, not the "Query Variables" tab. Clear out this section and type the JSON variables object into the correct tab.