Issue with Kepware API Script in Ignition's Project Library (401 Error)

Automated Testing
1

Hi everyone,

I've written two scripts to automate the creation of channels, devices, tag groups, and tags in Kepware using its API.

  1. Script 1 : Uses API requests via system.net.httpClient().
  2. Script 2 : Uses Kepware's Python libraries (kepconfig).

Issue

When I run Script 1:
It works fine in:

  • Local IDE (e.g., PyCharm, VS Code, etc.)
  • Ignition's Script Console
  • Directly on an Ignition component (e.g., button script)

However, when I move it to Ignition's Project Library and try executing the function, I get a 401 Unauthorized error.

What I've Tried

  • Checked authentication details (same credentials work in other cases).
  • Used both system.net.httpPost() and system.net.httpClient().post().
  • Verified that Kepware is running and accessible.
  • Confirmed that Script 2 (using kepconfig) works without issues.

Has anyone encountered this before? Could there be a difference in how Ignition handles authentication for scripts in the Project Library vs. direct execution?

Scripts Below for Reference:
(Script 1 - API requests)


import json
def createChannel(channelName, deviceDriver):
url = "http://127.0.0.1:57412/config/v1/project/channels"
payload = {
"common.ALLTYPES_NAME": channelName,
"servermain.MULTIPLE_TYPES_DEVICE_DRIVER": deviceDriver
}
headers = {
'Authorization': 'Basic Q………….',
'Content-Type': 'application/json'
}
response = system.net.httpClient().post(url, headers=headers, data=json.dumps(payload))
print("Create Channel Response:", response.statusCode)

(Similar functions for device, tag group, and tag creation)

(Script 2 - Kepware libraries)

import kepconfig.connection as connection
import kepconfig.connectivity as connectivity
from kepconfig.connectivity import channel, device, tag
server = connection.server(host='127.0.0.1', port=57412, user='Administrator', pw='')
try:
    channel_data = {"common.ALLTYPES_NAME": "ChannelY", "servermain.MULTIPLE_TYPES_DEVICE_DRIVER": "Modbus TCP/IP Ethernet"}
    channel.add_channel(server, channel_data)
except:
    print("Channel exists")

(Similar structure for device, tag group, and tag creation)
Version: 8.1.36
Any insights or suggestions would be greatly appreciated! Thanks in advance.

2

In a project library, all code you expect to use must be in a function, so you can call the function. Indentation matters.

3

If this is really just http and not https you should be able to do a Wireshark capture and see what’s different about the requests.

4

Yes, I made sure it is in a function and properly indented.

5

I am guessing when you move script to library, its trying to access the Kepware from the Gateway Server which may have different configuration than this:
server = connection.server(host='127.0.0.1', port=57412, user='Administrator', pw='')

And when you call the same form button or ignition script console, it refers the Kepware from the client server.