This works to create a flow run with no parameters:

mutation {
  create_flow_run(
    input: {flow_id: "XXXXXXXXXXX"}
  ) {
    id
  }
}

Since

parameters

is another argument to the create_flow_run function, I figured I could simply add it to the input dict, but every version I have tried has led to an error of

Expected Type JSON

. My first pass was:

mutation {
  create_flow_run(
    input: {flow_id: "XXXXXXXXX", parameters: {cycler_id: 123}}
  ) {
    id
  }
}

and I've tried adding quotes in several places, changing the value to a string, but all to no avail. Thanks for any help!

It will handle that JSON for you if you pass in a dict of parameters

Thanks, Kevin. I'll post the right answer when I work through that example.

Ok, I was able to get it working. I had to have two different elements in the body. "query" is

mutation ($input: createFlowRunInput!) {
  createFlowRun(input: $input) {
    flow_run {
      id
    }
  }
}

and "variables" is

{
  "input": {
    "parameters": {
      "cycler_number": 7
    },
    "versionGroupId": "XXXXXXXXXXX"
  }
}

Thanks as always for pointing me in the right direction