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Building paid security.txt, rel-attribute, and security-headers APIs for AI agents (x402)

This story is from 2026-09-12. It is preserved in the archive; the latest stories are on the live feed.

Three new sub-cent endpoints just shipped to the URL Metadata API (x402-paid on Base mainnet). Each costs $0.0005 USDC per call — five tenths of a USDC cent — and runs through the same pay-once-call-once x402 settlement the rest of the 35-route catalog uses. Here's what each one does and which agen…

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  1. 2026-09-12 00:13 · DEV Community — AI
    Building paid security.txt, rel-attribute, and security-headers APIs for AI agents (x402)

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