Task

Evaluate Spf Record

1 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

Email authentication x402 REST usage

Evaluate an SPF record against an IPv4/IPv6 address using only its literal ip4/ip6/all mechanisms. DNS-dependent mechanisms (include, a, mx, exists, redirect) reached before a match yield an honest `indeterminate` result...

emailauth.openverbs.com Comms & Messaging 1 calls / 30d checked 2026-10-26

0.004 USDC per call per call

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