With the query that you're using as shown, it would only give you the Types of objects. You can get all the queries of Query type with the below:
{
__schema {
queryType {
name
fields {
name
}
}
}
}
For example, running the above on GitHub's GraphQL responds with the below:
{
"data": {
"__schema": {
"queryType": {
"name": "Query",
"fields": [
{
"name": "codeOfConduct"
},
{
"name": "codesOfConduct"
},
{
"name": "enterprise"
},
{
"name": "enterpriseAdministratorInvitation"
},
{
"name": "enterpriseAdministratorInvitationByToken"
},
{
"name": "license"
},
{
"name": "licenses"
},
{
"name": "marketplaceCategories"
},
{
"name": "marketplaceCategory"
},
{
"name": "marketplaceListing"
},
{
"name": "marketplaceListings"
},
{
"name": "meta"
},
{
"name": "node"
},
{
"name": "nodes"
},
{
"name": "organization"
},
{
"name": "rateLimit"
},
{
"name": "relay"
},
{
"name": "repository"
},
{
"name": "repositoryOwner"
},
{
"name": "resource"
},
{
"name": "search"
},
{
"name": "securityAdvisories"
},
{
"name": "securityAdvisory"
},
{
"name": "securityVulnerabilities"
},
{
"name": "topic"
},
{
"name": "user"
},
{
"name": "viewer"
}
]
}
}
}
}
You can search for the remaining fields within fields that you might need to add to your query by searching for __Field in the Documentation Explorer of GraphiQL.
