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Copilot Studio - Autonomous Agents
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Bad connection with custom connector.

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Posted on by
 Hello people. 
I have done a custom agent with copilot studio and I want it to connect to a personal API that I have running locally on localhost. I have done some research and in order to do so, I have to download a microsoft gateway, which I have done, and configure it. Done that. Later I have to create a custom connector that connects to the specificied localhost URL through that gateway. As well, I have done that. My problem appears when I try to use this custom connector in my agent through a topic. I have connected and configured my custom connector with my custom agent . Nevertheless, as soon as my topic reaches the part of it that uses the custom connector this error pops up in the window: Lo siento, se ha producido un error. Código de erro: SystemError. Id. de la conversación: f029bf14-7d98-41fe-8331-49e5ad81f79d. Hora (UTC): 10/15/2025 7:55:10 AM. 
I have tried everything, exposing publically my API, does not work, re-confifuring my connector, my gateway, my topic, all. 
 
This is how I have my topic : 
 
 
 
And this is my gateway: 
 
 
 
My custom connector: 
 
 
And my tool in the agent: 
 
Do not know what is not working. Would love some help.
 
Thank you
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