Troubleshooting A 400 Error When Posting Json Data To A Flask Endpoint From Javascript

By themelower On Jul 17, 2025

Sending Json Data To A Flask Using Requests In Python Askpython I was trying to send some json data to the sever following some online articles and the official flask documentation, but i keep getting a 400 error. what i've tried hasn't worked so far. Discover how to resolve a `400 error` when posting json data to a flask endpoint from your javascript application. learn about request handling differences in flask and how to debug.

Sending Json Data To A Flask Using Requests In Python Askpython My root endpoint works fine as shown in the screenshot below, but my post endpoint is returning a 400 bad request. this is confusing to me since it seems like it's all been formatted correctly. You are setting the content type header in your javascript code to "application json", which is correct. however, your flask view function does not check the content type header correctly.

How To Post And Send Json Data In Flask

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Troubleshooting a 400 Error When Posting JSON Data to a Flask Endpoint from JavaScript

Troubleshooting a 400 Error When Posting JSON Data to a Flask Endpoint from JavaScript

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