@hookflo/tern-mcp

MCP server for Tern — add verified webhook handlers to any project from Claude Code.

Install

Add to your Claude Code MCP config:

{
  "mcpServers": {
    "tern": {
      "command": "npx",
      "args": ["@hookflo/tern-mcp"]
    }
  }
}

Tools

add_webhook

Generate a complete verified webhook handler for any platform and framework. Returns code only (no filesystem writes). Framework is required.

add a Stripe webhook handler for my Next.js app
add a Clerk webhook with queue and Slack alerts
(If framework is missing, Claude should ask before calling add_webhook)

get_capabilities

Entry-point menu of everything Tern MCP can do.

what can Tern help me with?

verify_signature

Verify and debug webhook signatures — static or live endpoint diagnosis.

why is my Shopify webhook returning 400?
verify this stripe signature: headers... body... secret...

manage_dlq

List failed events and replay them.

show me all failed webhook events
replay dlq event dlq_abc123

list_platforms

List all 16+ supported platforms with algorithms and header formats.

what webhook platforms does Tern support?

Supported Platforms

Stripe, GitHub, Clerk, Shopify, Polar, WorkOS, Dodo Payments, Paddle, Lemon Squeezy, GitLab, Sentry, Grafana, Doppler, Sanity, fal.ai, Replicate

Links

• GitHub: github.com/Hookflo/tern
• Docs: tern.hookflo.com

Build & Publish

# build
npm run build

# test locally
node dist/index.js

# publish
npm publish --access public

Claude Code Config for testing

{
  "mcpServers": {
    "tern": {
      "command": "npx",
      "args": ["@hookflo/tern-mcp"]
    }
  }
}

Add this to ~/.claude/claude_desktop_config.json to test locally before publishing.