❓ Voiceflow API: "Unauthorized" (401) Error Despite Correct Pro Subscription and API Key

[Michal_Splho]

Hi everyone! I’m trying to connect my Voiceflow assistant to a Telegram bot via Glitch using the Dialog Manager API (https://general-runtime.voiceflow.com/...), but I keep getting a 401 Unauthorized error.

Here’s what I’ve already verified:

I’m on a Pro subscription
I’ve generated a Dialog Manager API key (VF.DM.XXXX...) directly from the Integrations tab of the correct project
My project is not set to Private
The VOICEFLOW_VERSION_ID and endpoint match the project exactly
I’ve tried regenerating the API key, promoted it to Primary, and re-tested
Curl command is formatted correctly:

curl -X POST https://general-runtime.voiceflow.com/state/680fd1e068f7e890f0a9bae8/user/test-user/interact
-H “Authorization: Bearer VF.DM.xxxxx”
-H “Content-Type: application/json”
-d ‘{“action”: {“type”: “text”, “payload”: “hello”}}’

but I always receive:

{“statusCode”:401,“message”:“Unauthorized”}

What could be causing this? Is there a known issue with project linking, key validity, or the API backend?

First I tried to create a scenario in Make, with the same result, same error message. Then I tried to connect Voiceflow with Telegram via Glitch. There must be something in Voiceflow I am not aware of, or something.

Thanks in advance for any help!

[samliew]

Hello,

This does not look like a Make.com question. May I suggest asking on the Voiceflow forum or to contact Voiceflow support.

If you need further assistance, please provide the following:

1. Relevant Screenshots

Could you please share screenshots and screen recordings of what you are trying to do? Also include screenshots of any error messages, module settings (fields), relevant filter settings (conditions), and module output bundles. We need to see what you’re working with to give you the best advice.

You can upload images here using the Upload icon in the text editor:

Sharing these details will make it easier for others to assist you.

— @samliew

[Michal_Splho]

Hello,
Well, I tried first to create Make scenario, connect Telegram with Voiceflow agent. I got the same error. There is something with authorisation which does not work in Make either. I think somebody here might know what it is. Voiceflow forum did not bring any answers. I am adding the screenshots of Make scenario and error message.