Error when calling the Anomaly Detection API - microsoft-cognitive

Question

I've been messing with the Anomaly Detection API as part of the Microsoft Cognitive Services Labs. However, when I try to POST data to get a response, it always comes back as
400: TypeError('string indices must be integers'
Thinking this is an issue with the format of the data I'm giving it, I double check it with what they have as a sample:
{
"Period": 7,
"Points": [
{
"Timestamp": "2018-03-01T00:00:00Z",
"Value": 32858923
},
{
"Timestamp": "2018-03-02T00:00:00Z",
"Value": 29615278
},
{
"Timestamp": "2018-03-03T00:00:00Z",
"Value": 22839355
},
]
}
And here is some of the data that I'm sending to it that returns the error:
{
"Period": 1,
"Points":[
{
"Timestamp": "1962-01-01T00:00:00Z",
"Value": 589
},
{
"Timestamp": "1962-02-01T00:00:00Z",
"Value": 561
},
{
"Timestamp": "1962-03-01T00:00:00Z",
"Value": 640
}
]
}
Using Python to call the API with the requests package:
request = json.dumps(output)
config = json.load(open("config.json"))
url = "https://api.labs.cognitive.microsoft.com/anomalyfinder/v1.0/anomalydetection"
headers = {"Ocp-Apim-Subscription-Key": config["apiKey"]}
response = requests.post(url, headers=headers, json=request)
The output object is a dictionary that looks like this:
{'Period': 1,
'Points': [{'Timestamp': '1962-01-01T00:00:00Z', 'Value': 589},
{'Timestamp': '1962-02-01T00:00:00Z', 'Value': 561},
{'Timestamp': '1962-03-01T00:00:00Z', 'Value': 640}]}
Which was derived from the monthly milk production data set.
Is there something wrong with my data that I'm missing to cause it to return back that error?