Connection error with OpenAI-compatible API (non-localhost, no /v1) behind VPN on JetBrains

[ALCales]

Plugin Type

JetBrains Plugin

App Version

5.7.0

Description

I am experiencing a "Connection error" when using a custom OpenAI-compatible internal API in the JetBrains version of the plugin. The exact same configuration (Endpoint, API Key, and VPN environment) works perfectly in the VS Code version of the plugin.

Kilo Code error message:

OpenAI completion error: Connection error. You seem to be using a proxy-based provider. Make sure to check its logs and to ensure it's not rewriting Roo's requests.

The JetBrains "Check proxy settings" tool returns "Connection successful" for the target API URL, confirming that the IDE can reach the endpoint, but Kilo Code seems unable to inherit or use these network settings correctly.

Manual curl -X GET https://xxxxx.yyyyyyy/api/v1/models from the JetBrains terminal works and returns the model list correctly.

Reproduction steps

1. Connect to a VPN required to access the API.
2. IDE Check connection tool returns "Connection Successful".
3. Configure Kilo Code with an OpenAI-compatible base URL (without /v1 suffix. Format: ttps://xxxxx.yyyyyyy/api).
4. The autocomplete feature for the list of models does not return any results. However, I type the model manually.
5. Attempt a completion.
6. Error appears.

Troubleshooting already performed:

• Tested with and without /v1 or /api suffixes in the Base URL.
• Configured "No Proxy" in JetBrains System Settings to avoid interference.
• Added the server certificate to JetBrains "Server Certificates" (HTTPS).
• Reinstalled and restarted the plugin multiple times.
• Verified the API key and model name are correct.

Provider

OpenAI-compatible

Model

Indifferent

System Information

Node.js Version: v22.13.1
CPU Architecture: aarch64
Operating System: Mac OS X 15.7.3
IDE Version: PhpStorm 2025.2.3 (build PS-252.26830.95)
Plugin Version: 5.7.0
JCEF Support: Yes

[fernandomfdz]

Same issue here 😭.

It does not work at all on my PHPStorm (last stable version) using a OpenAI compatible endpoint. Works perfectly on VS Code though

[josemahj]

Same issue here. I can confirm it works correctly in VS Code using the same OpenAI-compatible endpoint, API key, and VPN setup, but it consistently fails in the JetBrains plugin with the connection error.

For now, until this gets fixed, I’ll continue using Junie and Copilot as a workaround.