hookdeck/postmark-webhooks
> Receive and process Postmark webhooks. Use when setting up Postmark webhook handlers, handling email delivery events, processing bounces, opens, clicks, spam complaints, or subscription changes.
npx skills add https://github.com/hookdeck/webhook-skills --skill postmark-webhooks
Take hookdeck/postmark-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.