Alternative to · ngrok
ngrok tunnels your laptop. HookSense lets your agent await callbacks.
ngrok is brilliant for ad-hoc HTTP tunneling when a human is at the keyboard. But an AI agent doesn't need a tunnel to localhost — it needs to create a callback endpoint and block on the result. HookSense gives the agent a signed callback URL and a wait_for_callback primitive over MCP, no tunnel required.
What developers tell us about ngrok
- It's a tunnel for human-driven testing, not a programmable callback layer an agent can await over MCP.
- Tunnel restarts mean a new URL — useless as a stable callback target for a long-running agent job.
- ngrok's inspector shows live traffic, but there's no signature verification and no wait_for_callback primitive.
- Behind a corporate firewall, tunnel setup is non-trivial — and pointless when the agent just needs a hosted callback URL.
Why teams switch
Your agent awaits the result over MCP
create_callback_endpoint then wait_for_callback — the agent blocks until the signed payload arrives. No tunnel, no localhost, no polling.
MCP-native install
`npx @hooksense/mcp` adds the callback toolset to Claude or Cursor. The agent owns the endpoint lifecycle end to end.
Signature-verified callbacks
verify_signature is built in — every inbound callback is HMAC-checked before the agent acts on it. ngrok has no equivalent.
Works without a tunnel or open port
The callback endpoint is hosted by HookSense; there's nothing to tunnel and no inbound port to open. Corporate networks just work.
Pricing, side by side
ngrok
$8–20/mo
Tunnel for human testing: 3 endpoints, request quota, data usage
HookSense
$0 / $29/mo
Catch: callback endpoints + MCP. Hook: more endpoints, signature verification, retries (soon)
How to migrate (15 minutes)
- 1Install the MCP server: `npx @hooksense/mcp` in Claude or Cursor.
- 2Have your agent call create_callback_endpoint to get a hosted, signed callback URL.
- 3Hand that URL to the long-running tool, async job, or human approver — no tunnel needed.
- 4The agent calls wait_for_callback and blocks until the signed result arrives.
- 5Stop running `ngrok http 3000` before every agent run.
FAQ
Do I still need ngrok for non-callback tunneling?
Possibly. If you tunnel SSH, share a local dev server, or test webhooks by hand, ngrok is still the right tool. HookSense is the agent-native callback layer — it gives an agent a hosted callback URL and a wait_for_callback primitive, not a tunnel.
How does an agent await a callback without a tunnel?
The callback endpoint is hosted by HookSense. The agent calls wait_for_callback over MCP and blocks until the signed payload arrives — nothing runs on localhost and no port is opened.
Can the callback survive across a long agent run?
Yes. The endpoint is stable for the life of the job, so a long tool call or a human-in-the-loop approval can take minutes or hours and the agent still receives the signed result.
Give your agent a callback URL.
Add HookSense to Claude or Cursor with `npx @hooksense/mcp`. Free to start; request early access for paid plans.
Get a callback URL