Set mime type of response object in Flask

flask_response_mime_type.py

@app.route('/download', methods=['GET'])
def download():
    data = json.dumps({"example" : "json string"})
    response = make_response(data)
    response.headers['Content-Type'] = 'text/json'
    response.headers['Content-Disposition'] = 'attachment; filename=example.json'
    return response

how could i send token in header in flask restful api

If all your responses will have only one response content-type this approach is pretty useful (implemented on the flask app declaration):

@app.after_request
def after_request_func(data):
    response = make_response(data)
    response.headers['Content-Type'] = 'application/json'
    return response

'application/json' as my default response type for a basic API