hookdeck/nmi-webhooks
> Receive and verify NMI (Network Merchants) webhooks. Use when setting up NMI webhook handlers, debugging Webhook-Signature verification, or handling transaction events like transaction.sale.success, transaction.auth.success, use Standard Webhooks — the Webhook-Signature header is "t=<nonce>,s=<sig>" (comma-separated) where t is a NONCE (not a Unix timestamp), and the signature is HMAC-SHA256 over "<nonce>.<raw_body>", lowercase hex.
npx skills add https://github.com/hookdeck/webhook-skills --skill nmi-webhooks
Take hookdeck/nmi-webhooks from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.
The instructions reference npx.
Without those the skill loads but fails at the first command.