GetResponse API Docs

{
    "url": "https://leadthing.dev/api/getresponse",
    "method": "POST",
    "headers": {
        "apiKey": "Sign in to get your LEADTHING.DEV API key",
        "content-type": "application/json"
    },
    "body": {
        firstname: "John",
        lastname: "Smith",
        email: "john.smith@example.com",
        ip: "127.0.0.1",
        listId: "1234",
        getresponseApiKey: "GET_RESPONSE_API_KEY"
    }
}