AI & the web
CORS
Browser rules and response headers controlling cross-origin access by frontend scripts.
In everyday use
An embedded tool needs permission to read data from another domain.
What to keep in mind
It is not a general replacement for authentication or server-side access controls.
Also searched as: Cross-Origin Resource Sharing
Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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