Desktop tools

Cursor

Route Cursor Chat + Composer through Token Harbor.

Cursor's Chat + Composer feature both accept custom OpenAI endpoints.

Steps

https://tokenharbor.ai/v1

Paste your Token Harbor key (thk_live_…) in the API Key field.
Under Custom models, add the ids you want — gpt-5, claude-sonnet-4-5, claude-opus-4-5, deepseek-chat, etc.
Save. Cursor's Chat and Composer now route through Token Harbor.

Cursor uses both streaming and non-streaming requests depending on the operation. Token Harbor supports both transparently.
Context windows: Token Harbor forwards the client's full request up to the model provider's own limit (e.g. ~200K for Claude 3.5 Sonnet). No artificial truncation.
If a specific Cursor feature (Apply, Cmd-K edits) fails, check Cursor's debug console — the error usually states which incompatible header or parameter was sent. Token Harbor is strict about OpenAI-compat schema.

Desktop tools

Route Cursor Chat + Composer through Token Harbor.

Cursor's Chat + Composer feature both accept custom OpenAI endpoints.

https://tokenharbor.ai/v1

Paste your Token Harbor key (thk_live_…) in the API Key field.
Under Custom models, add the ids you want — gpt-5, claude-sonnet-4-5, claude-opus-4-5, deepseek-chat, etc.
Save. Cursor's Chat and Composer now route through Token Harbor.

Cursor uses both streaming and non-streaming requests depending on the operation. Token Harbor supports both transparently.
Context windows: Token Harbor forwards the client's full request up to the model provider's own limit (e.g. ~200K for Claude 3.5 Sonnet). No artificial truncation.
If a specific Cursor feature (Apply, Cmd-K edits) fails, check Cursor's debug console — the error usually states which incompatible header or parameter was sent. Token Harbor is strict about OpenAI-compat schema.