AI agents can now pay for things on their own. The — seller-side Express middleware. Turns any upstream into a paid, attested endpoint.
(MIT) gives Claude Desktop / Claude Code / Cursor a
buy → verify-before-act tool out of the box.Either way: if your code acts on data it paid for, verify it first. Provenance is cheap. Acting on tampered bytes isn't.
Questions or corrections welcome in the comments — I'd rather fix something than leave it wrong.
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