Using your own API key with Cursor does not bypass Cursor's servers; the document states all requests, regardless of API key source, are processed through Cursor's backend.
This analysis describes what Cursor's agreement states, permits, or reserves. It does not constitute a legal determination about enforceability. Regulatory applicability and practical outcomes may vary by jurisdiction, enforcement context, and individual circumstances. Read our methodology
This provision clarifies that users who supply their own API keys cannot avoid Cursor's data pipeline, meaning the same data handling terms apply regardless of whether a personal or organizational API key is used.
Users who assumed that supplying their own API key would route requests directly to a model provider should note that the document states all requests still pass through Cursor's backend for prompt building, subjecting those requests to Cursor's applicable data use terms.
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"Even if you use your API key, your requests will still go through our backend! That's where we do our final prompt building.— Excerpt from Cursor's Cursor Data Use & Privacy Overview
(1) REGULATORY LANDSCAPE: This provision is relevant to GDPR data controller and processor classification, as Cursor's backend involvement in all requests means Cursor processes data regardless of API key source. This may affect how organizations classify Cursor in their data processing records and what contractual protections apply. CCPA disclosure obligations apply to this processing activity. (2) GOVERNANCE EXPOSURE: Medium. Organizations that deployed Cursor with employee-supplied or organizational API keys under the assumption that data would not pass through Cursor's infrastructure should update their data mapping and vendor assessments accordingly. The disclosure is operationally significant for enterprise risk management. (3) JURISDICTION FLAGS: EU/EEA organizations that assumed own-API-key usage avoided GDPR processor obligations for Cursor should reassess this position given this disclosure. Regulated industries where backend routing creates compliance concerns (e.g., legal, financial, healthcare) face heightened exposure. (4) CONTRACT AND VENDOR IMPLICATIONS: Enterprise contracts with Cursor should address backend processing of own-API-key requests explicitly. Procurement teams should confirm whether a data processing agreement covers this backend processing activity regardless of API key source. (5) COMPLIANCE CONSIDERATIONS: Organizations should update data processing records to reflect Cursor's backend involvement for all request types, and assess whether existing DPAs with Cursor cover this processing activity. This disclosure may constitute a material operational clarification requiring review of existing vendor risk assessments.
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This provision clarifies that users who supply their own API keys cannot avoid Cursor's data pipeline, meaning the same data handling terms apply regardless of whether a personal or organizational API key is used.
Users who assumed that supplying their own API key would route requests directly to a model provider should note that the document states all requests still pass through Cursor's backend for prompt building, subjecting those requests to Cursor's applicable data use terms.
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