Ok, i'm thinking, there's something about graphql i don't know... but perhaps others also don't know it. So i think it should be in the readme perhaps.

{
    process Mutation
}


{
  "errors": [
    {
      "message": "Unknown field \"process\" on type \"Query\"",
      "locations": [
        {
          "line": 30,
          "column": 2
        }
      ]
    },
    {
      "message": "Unknown field \"Mutation\" on type \"Query\"",
      "locations": [
        {
          "line": 30,
          "column": 10
        }
      ]
    }
  ]
}

Where do you run process Mutation?