Where does the bug appear (feature/product)?
Cursor IDE
Describe the Bug
In Cursor Settings → Models → API Keys, all provider API key input fields (OpenAI, Anthropic, Google) appear visually disabled (gray / inactive) and do not accept keyboard input. Enabling Override OpenAI Base URL does not make the key or base URL editable. Goal was to point OpenAI-compatible traffic at a local MLX server (http://localhost:9999/v1) with a placeholder API key.
Steps to Reproduce
Open Cursor Settings (Models page).
Expand API Keys.
Click the OpenAI / Anthropic / Google API key text fields.
Try to type a key.
Toggle Override OpenAI Base URL on.
Observe whether a base URL text field becomes editable and whether any key field accepts input.
Expected Behavior
Key fields accept typing; after enabling Override, the OpenAI base URL field is editable (e.g. set to localhost).
Screenshots / Screen Recordings
Operating System
MacOS
Version Information
Cursor: 3.15.6 (stable)
VS Code: 1.128.0
Commit: a1f686545fd0ce8917bbd2449f733551a9bce420
Date: 2026-08-06T01:41:03.876Z
(Also confirm via Cursor → About Cursor → Copy when posting.)
For AI issues: which model did you use?
N/A — bug is in Settings → Models → API Keys UI before model use. Intended local setup: OpenAI-compatible MLX at http://localhost:9999/v1.
For AI issues: add Request ID with privacy disabled
N/A (settings UI; no chat request). If you reproduce after temporarily disabling Privacy Mode and something generates a request, paste Request ID from chat … → Copy Request ID.
Additional Information
Account: Pro+ (stripeMembershipType: pro_plus, subscription active).
Admin settings cache: byokDisabled: false (BYOK not admin-blocked; API Keys section is visible).
Privacy Mode: enabled (PRIVACY_MODE_NO_TRAINING).
Invalid settings.json keys were tried earlier (cursor.openai.apiKey, cursor.general.openAIBaseURL) and removed — those are unknown configuration settings and are not how BYOK is configured.
Workarounds tried: clicking fields, toggling Override, considering restart / sign-out.
Console: please attach any errors from Help → Toggle Developer Tools → Console while clicking the gray fields.
Does this stop you from using Cursor
No - Cursor works, but with this issue