Microsoft Restricts VSCode Extensions on Cursor AI IDE: Licensing, Market Policies, and Community Impact

Two days ago a user on the Cursor AI programming tool forum asked whether VSCode extensions, specifically Microsoft’s C/C++ extension, could still be used on Cursor, sparking widespread discussion.

It was discovered that versions 1.18.21 and later of the extension no longer function on Cursor, while version 1.17.62 still works, indicating a recent change in compatibility.

Analysis of the extension’s 192‑line license reveals a clause that limits its use to VSCode and other Microsoft‑approved products, explicitly prohibiting use on third‑party tools such as Cursor.

Further investigation traced the restrictive rule to line 485 of the nativeStrings.json file, a phrase added on April 1, which enforces the limitation.

Microsoft’s VSCode marketplace terms state that extensions may only be used with “in‑scope products and services,” including Visual Studio, VS Code, GitHub Codespaces, Azure DevOps, and Azure DevOps Server, and the company appears to be enforcing these terms more strictly.

Because of this, developers using Cursor see pop‑up notifications when attempting to use features like “Find All References” with the Microsoft C/C++ extension, and the extension’s functionality is disabled.

The Open VSX marketplace, created by the Eclipse Foundation as an open alternative, offers fewer extensions and lower adoption, but it remains a potential route for developers seeking unrestricted tools.

Cursor’s recent AI‑driven “Agent Mode” may have triggered Microsoft’s tighter enforcement, as the AI features position Cursor as a direct competitor to VS Code.

Community reactions range from criticism of Microsoft’s market‑locking tactics to concerns about open‑source code being leveraged for profitable AI products, with many users expressing frustration over subscription costs and seeking alternatives like the clangd extension.