Python

import csv
import urllib.request
import json

url = 'https://app.planning.nl/OData/V1/projects?$select=Id,Number,Description'

authentication_header = 'X-API-KEY'
api_key = "api-key-hier"
file_path = 'output.csv'


# Create the request object and add the authentication header
req = urllib.request.Request(url+filters)
req.add_header(authentication_header, api_key)

# Send the request and read the response
response = urllib.request.urlopen(req)
data = response.read()

# Parse the response as JSON
json_data = json.loads(data)

# Extract the data from the JSON object
items = json_data['value']

# Create a CSV file and write the data to it
with open(file_path, 'w', newline='') as csvfile:
    writer = csv.writer(csvfile)
   
    # Write the header row
    writer.writerow(items[0].keys())
   
    # Write the data rows
    for item in items:
        writer.writerow(item.values())