stripe-local-dev

Apps & Automation

Fix Stripe webhook 400 errors in local development. The problem: `stripe listen` generates a new secret each time it starts, but your app uses a stale secret from .env.local. This skill auto-syncs the ephemeral secret before your dev server starts. Auto-invoke when: stripe webhooks return 400, "signature verification failed", "No signatures found matching", webhooks not working locally, checkout succeeds but subscription doesn't update, STRIPE_WEBHOOK_SECRET mismatch, setting up stripe listen, configuring pnpm dev with Stripe.

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/stripe-local-dev

Ensure Stripe webhooks work in local development by auto-syncing ephemeral secrets.

The Problem

Stripe CLI generates a new webhook secret every time stripe listen starts. If your dev script auto-starts the listener but doesn't sync the secret, you get:

Webhook error: signature verification failed
No signatures found matching the expected signature for payload

The Solution Pattern

Auto-start requires auto-sync. Use dev-stripe.sh:

Extract secret via stripe listen --print-secret
Sync to environment (Convex env OR .env.local)
THEN start forwarding

Architecture Decision

Webhook Location	Secret Sync Target	Restart?	Recommendation
Convex HTTP (`convex/http.ts`)	`npx convex env set`	No	Best
Next.js API Route	`.env.local`	Yes	Requires orchestration

Prefer Convex HTTP webhooks - secret sync is instant, no restart needed.

Implementation

Option A: Convex HTTP Webhooks (Recommended)

Copy script:

cp ~/.claude/skills/stripe-local-dev/scripts/dev-stripe-convex.sh scripts/dev-stripe.sh
chmod +x scripts/dev-stripe.sh

Update package.json:

"stripe:listen": "./scripts/dev-stripe.sh"

Option B: Next.js API Webhooks

Copy script:

cp ~/.claude/skills/stripe-local-dev/scripts/dev-stripe-nextjs.sh scripts/dev-stripe.sh
chmod +x scripts/dev-stripe.sh

Update package.json:

"stripe:listen": "./scripts/dev-stripe.sh"

Note: Next.js needs restart to pick up env changes. The script warns about this.

Verification

After setup, run:

pnpm dev
# Then in another terminal:
stripe trigger checkout.session.completed
# Check logs for 200 response, not 400

Quick Diagnostics

Symptom	Cause	Fix
All webhooks return 400	Stale secret	Restart `pnpm dev` or run sync script
"signature verification failed"	Secret mismatch	Check CLI output matches env
Works once, fails after restart	No auto-sync	Add `dev-stripe.sh` script
CLI shows delivered, app shows error	Wrong env target	Check sync target (Convex vs .env.local)

Related Skills

/check-stripe - Audit Stripe integration
/stripe-health - Webhook health diagnostics
/stripe-audit - Comprehensive Stripe audit