How to pass a request to sagemaker using postman

Question

I've trained a model on sagemaker and have created the endpoint. I'm trying to invoke the endpoint using postman. But when training the model and even after that, I have not specified any header for the training data. I'm at a loss as to how to create payload while sending a post request to sagemaker

Answer 1

Here's an example for calling the sagemaker endpoint created in the quickstart guide. You can call it using text/csv or application/json formats:

In Postman: The url you want is POST https://runtime.sagemaker.{{region}}.amazonaws.com/endpoints/{{aws_model_name}}/invocations

In the Authorization tab, choose type AWS Signature and put in the values for your AccessKey and SecretKey (recommend you use variables for these), and sagemaker for Service Name.

Under Headers add:

Content-Type : text/csv

Accept: application/json

In Body: paste in your body, separated by commas (if yr following the quickstart guide, in the notebook you can simply run print(valid_set[0][60:61]) to get an example vector. You'll need to convert that value set into comma separated values

Clicking Send and you should be good to go!

For sending JSON data, change the Content-Type to application/json and you'll want the structure to look like this:

{
    "instances":[
        {
            "configuration": {},
            "features": [...]
        }
     ]
}