I’m reaching out because I’m encountering a recurring problem with my N8N setup. Specifically, whenever I try to integrate any external app—whether it’s OpenAI, Redis, or any other service—by pasting in the API key, I keep getting a connection error. It seems like N8N is unable to connect with any external service I try to link.
I’d really appreciate any guidance on what might be causing this or if anyone else has run into a similar issue. Any tips would be greatly appreciated!
For integrations of apps that already exists in n8n, there is always a documentation page regarding the integration. And usually the button is above the form as shown in the image I uploaded:

If you meant integrations with external services (e.g. using HTTP Request node) it’s usually a missing parameter. It differs from error to error of course. You should check out the documentation of that external service to understand their endpoints better in this case.
