See the public footprint.
Understand the risk.

import os
import requests

url = (
    "https://api.ferretly.com"
    "/api/Subjects"
)
key = os.getenv("FERRETLY_API_KEY")
subject = {
    "name": "John Doe",
    "city": "Anytown",
    "state": "CA",
}

response = requests.post(
    url,
    headers={"X-Api-Key": key},
    json={"subjectData": subject},
)
print(response.json())

const url =
  "https://api.ferretly.com" +
  "/api/Subjects";
const key = process.env.FERRETLY_API_KEY;

const response = await fetch(url, {
  method: "POST",
  headers: { "X-Api-Key": key },
  body: JSON.stringify({
    subjectData: {
      name: "John Doe",
      city: "Anytown",
      state: "CA",
    },
  }),
});

console.log(await response.json());

var client = new HttpClient();
var key = Environment
    .GetEnvironmentVariable(
        "FERRETLY_API_KEY");
client.DefaultRequestHeaders.Add(
    "X-Api-Key", key);

var url =
    "https://api.ferretly.com"
    + "/api/Subjects";
var response = await client
    .PostAsJsonAsync(url, new {
        subjectData = new {
            name = "John Doe",
            city = "Anytown",
            state = "CA",
        }
    });

curl --request POST \
  --header "X-Api-Key: $FERRETLY_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "subjectData": {
      "name": "John Doe",
      "city": "Anytown",
      "state": "CA"
    }
  }' \
  https://api.ferretly.com/api/Subjects