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Never Charged for a No: A Machine-Checkable Refusal Contract for Paid Agent APIs

This story is from 2026-10-06. It is preserved in the archive; the latest stories are on the live feed.

Your agent calls a paid endpoint. The endpoint refuses — wrong policy, missing subject, upstream data down — and the invoice still lands. The refusal was free to say ; the charge was real. If you have ever audited agent spend and found rows of settled payments attached to error responses, you know…

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  1. 2026-10-06 20:59 · DEV Community — AI
    Never Charged for a No: A Machine-Checkable Refusal Contract for Paid Agent APIs

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