Source Trust Envelope API: pay-per-call workflow vs account-based APIs

Source Trust Envelope API: pay-per-call workflow vs account-based APIs

Citing a bad source costs more than the call to check it. An agent needs a verdict, not three raw reports to reconcile itself.

| Need | Account-based API | AgentUtility draft angle | |---|---|---| | Pre-citation trust job | Sign up, store keys, handle billing | Pay per call with x402 and get a single verdict | | Workflow shape | Stitch a content-authenticity API, a web search API, and a domain-reputation API by hand | Start from Source Trust Envelope API as one $0.07 bundled call | | Review status | Marketing claim risk | Policy gate required before publication |