Paysmith CLI — add a reversible $1 sandbox paywall demo to your app (paysmith init), inspect it (paysmith status), and remove it cleanly (paysmith remove). No signup required.

Next.js App Router templates for the Paysmith $1 unlock demo — installed by the Paysmith CLI, unlocked only by verified signed events, removable via a hash manifest.

Paysmith contract foundation: zod schemas for the wire contracts, prefixed ids, decimal-string money, RFC 8785-style canonical JSON, Ed25519 event signing, and idempotency primitives.

Verify Paysmith signed webhook events from raw request bytes — Ed25519 with timestamp tolerance and pinned key ids — and deduplicate at-least-once deliveries.

Paysmith JavaScript SDK — server client for sandbox payment intents, receipts and entitlements, plus browser-safe checkout helpers that never hold a token.