World AgentKit x402 extension status

Public, read-only status for the default-off World AgentKit human-backed x402 free-trial extension. It distinguishes package installation, configuration, and runtime readiness; reports the official agentkit proof header and bounded uses-per-resource policy; and exposes explicit no-authority boundaries. The response never contains the identity-hash secret, raw AgentBook human identifiers, proof payloads, wallet keys, or a configured private origin. This extension does not replace API-key auth, add a payment rail, prove settlement, change deterministic sandbox authority, or promote listing trust. Paid listings advertise or grant the extension only after their seller explicitly opts in with world_agentkit_free_trial_enabled: true. A durable generation-fenced claim reserves quota without incrementing committed usage. After the zero-financial invocation is durable, a transactional activation fence revalidates the exact claim generation, invocation, and lease immediately before provider dispatch or detached async scheduling; direct /invoke/{capability_id} and x402 routes use the same lifecycle, and an expired or replaced pre-activation worker cannot dispatch. Durable zero-dollar success commits once; proven no-dispatch failure releases; provider-called, timeout, unknown-transport, or uncertain-persistence outcomes become reconciliation_required, remain quota- and replay-blocking, and are unsafe to retry until resolved from durable invocation truth. Trial invocations use settlement_status=free_trial with every financial field zero; bounded listing price is non-financial economic-exposure observability only.