sample-blame.graphql

{
  repository(owner: "facebook", name: "mention-bot") {
    object(expression: "4f897712d6ea78aa25bb4772011cc248a2294138") {
      ... on Commit {
        blame(path: "cookieJar.js") {
          ranges {
            startingLine
            endingLine
            age
            commit {
              message
              author {
                name
              }
            }
          }
        }
      }
    }
  }
}

sample-response.json

{
  "data": {
    "repository": {
      "object": {
        "blame": {
          "ranges": [
            {
              "startingLine": 1,
              "endingLine": 57,
              "age": 10,
              "commit": {
                "message": "adding github auth flow",
                "author": {
                  "name": "Zeke Nierenberg"
                }
              }
            }
          ]
        }
      }
    }
  }
}