Inbound Message Firewall API: pay-per-call workflow vs account-based APIs

Inbound Message Firewall API: pay-per-call workflow vs account-based APIs

An inbound message that cites a source needs both checked before an agent acts. Checking the message alone leaves the source unverified.

| Need | Account-based API | AgentUtility draft angle | |---|---|---| | Pre-action gate job | Sign up, store keys, handle billing | Pay per call with x402 and get one act, verify, or block decision | | Workflow shape | Stitch a prompt-injection API, a moderation API, an AI-detection API, and a content-authenticity API by hand | Start from Inbound Message Firewall API as one $0.06 bundled call | | Review status | Marketing claim risk | Policy gate required before publication |