webhook-handler-patterns
Best practices for webhook handlers. Use when implementing the handler sequence (verify first, parse second, handle idempotently), idempotency, error handling, retry logic, or framework-specific issues with Express, Next.js, or FastAPI.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/hookdeck/webhook-skills --skill webhook-handler-patterns- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads webhook-handler-patterns automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Webhook Handler Patterns
When to Use This Skill
- Following the correct webhook handler order (verify → parse → handle idempotently)
- Implementing idempotent webhook handlers
- Handling errors and configuring retry behavior
- Understanding framework-specific gotchas (raw body, middleware order)
- Building production-ready webhook infrastructure
Resources
Handler Sequence
- references/handler-sequence.md - Verify first, parse second, handle idempotently third
Best Practices
- references/idempotency.md - Prevent duplicate processing
- references/error-handling.md - Return codes, logging, dead letter queues
- references/retry-logic.md - Provider retry schedules, backoff patterns
Framework Guides
- references/frameworks/express.md - Express.js patterns and gotchas
- references/frameworks/nextjs.md - Next.js App Router patterns
- references/frameworks/fastapi.md - FastAPI/Python patterns
Quick Reference
Handler Sequence
- Verify signature first — Use raw body; reject invalid requests with 4xx.
- Parse payload second — After verification, parse or construct the event.
- Handle idempotently third — Check event ID, then process; return 2xx for duplicates.
See references/handler-sequence.md for details and links to provider verification and idempotency patterns.
Response Codes
| Code | Meaning | Provider Behavior |
|---|---|---|
2xx | Success | No retry |
4xx | Client error | Usually no retry (except 429) |
5xx | Server error | Retry with backoff |
429 | Rate limited | Retry after delay |
Idempotency Checklist
- Extract unique event ID from payload
- Check if event was already processed
- Process event within transaction
- Store event ID after successful processing
- Return success for duplicate events
Related Skills
- stripe-webhooks - Stripe payment webhook handling
- shopify-webhooks - Shopify e-commerce webhook handling
- github-webhooks - GitHub repository webhook handling
- resend-webhooks - Resend email webhook handling
- chargebee-webhooks - Chargebee billing webhook handling
- clerk-webhooks - Clerk auth webhook handling
- elevenlabs-webhooks - ElevenLabs webhook handling
- openai-webhooks - OpenAI webhook handling
- paddle-webhooks - Paddle billing webhook handling
- hookdeck-event-gateway - Webhook infrastructure that replaces your queue — guaranteed delivery, automatic retries, replay, rate limiting, and observability for your webhook handlers
FAQ
What does the webhook-handler-patterns skill do?
Best practices for webhook handlers. Use when implementing the handler sequence (verify first, parse second, handle idempotently), idempotency, error handling, retry logic, or framework-specific issues with Express, Next.js, or FastAPI.
How do I install webhook-handler-patterns?
Run npx skills add https://github.com/hookdeck/webhook-skills --skill webhook-handler-patterns in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/webhook-handler-patterns/ (personal) or .claude/skills/webhook-handler-patterns/ (project).
Which AI agents can use webhook-handler-patterns?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is webhook-handler-patterns safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains webhook-handler-patterns?
It is published by hookdeck in hookdeck/webhook-skills. It has 444 recorded installs.
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