Cursor Custom Model API Key Returns HTTP Request Error

What this error means

With custom model API key get request error — configured third-party model returns request failures is a Cursor failure pattern reported for developers trying to fix api key request errors when configuring custom/third-party models in cursor ide settings. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Forum.cursor.com thread (t/with-custom-model-api-key-get-request-error/144251) documents users failing to use non-Cursor proprietary models due to API key request errors. Distinct from covered ‘model not available’ because it targets custom model API key validation specifically. Also corroborated by MiniMax-M2 issue #56 showing ‘does not work with your current plan or api key’ for third-party integrations. Category mapping: exact Cursor IDE config error.

Common causes

• Forum.cursor.com thread (t/with-custom-model-api-key-get-request-error/144251) documents users failing to use non-Cursor proprietary models due to API key request errors. Distinct from covered ‘model not available’ because it targets custom model API key validation specifically. Also corroborated by MiniMax-M2 issue #56 showing ‘does not work with your current plan or api key’ for third-party integrations. Category mapping: exact Cursor IDE config error.

Quick fixes

1. Confirm the exact error signature matches With custom model API key get request error — configured third-party model returns request failures.
2. Check the Cursor account, local tool state, and provider configuration involved in the failing workflow.
3. Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://forum.cursor.com/t/with-custom-model-api-key-get-request-error/144251
• https://github.com/MiniMax-AI/MiniMax-M2/issues/56
• https://www.reddit.com/r/cursor/comments/1qiqik4/the_model_default_does_not_work_with_your_current/

Evidence note: Forum.cursor.com thread (t/with-custom-model-api-key-get-request-error/144251) documents users failing to use non-Cursor proprietary models due to API key request errors. Distinct from covered ‘model not available’ because it targets custom model API key validation specifically. Also corroborated by MiniMax-M2 issue #56 showing ‘does not work with your current plan or api key’ for third-party integrations. Category mapping: exact Cursor IDE config error.

Related errors

• Cursor

FAQ

What should I check first?

Start with the exact With custom model API key get request error — configured third-party model returns request failures text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed Cursor workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without With custom model API key get request error — configured third-party model returns request failures.