Content
# @hooksense/mcp
Model Context Protocol server for [HookSense](https://hooksense.com) — the webhook & callback layer for AI agents. Lets Claude Desktop, Cursor, Claude Code, Continue, and any MCP client create a callback URL, **wait for the result instead of polling**, and verify its signature — all from the agent session.
## Why
Agents that kick off async work — a deploy, a render, a human-in-the-loop approval, a long tool call, another agent — need the result back without burning context on polling loops. With this server the agent creates a callback endpoint, hands the URL to the job, then calls `wait_for_callback` and is woken the instant the webhook lands — signature-verified and decrypted. Stop polling for async results; await them.
## Setup
1. Get an API token at <https://hooksense.com/account/tokens>
2. Configure your MCP client (examples below)
### Claude Desktop / Claude Code
Add to `~/Library/Application Support/Claude/claude_desktop_config.json` (macOS) or `%APPDATA%\Claude\claude_desktop_config.json` (Windows):
```json
{
"mcpServers": {
"hooksense": {
"command": "npx",
"args": ["-y", "@hooksense/mcp"],
"env": {
"HOOKSENSE_TOKEN": "hsk_your_token_here"
}
}
}
}
```
### Cursor
Add to `~/.cursor/mcp.json`:
```json
{
"mcpServers": {
"hooksense": {
"command": "npx",
"args": ["-y", "@hooksense/mcp"],
"env": {
"HOOKSENSE_TOKEN": "hsk_your_token_here"
}
}
}
}
```
## Hello callback (60 seconds)
Once configured, ask your agent:
1. **Create** — "Create a callback endpoint." → the agent calls `create_callback_endpoint` and gets back a `callbackUrl` like `https://hooksense.com/w/ab12cd`.
2. **Fire** — point any job at that URL (or just `curl -X POST <callbackUrl> -d '{"status":"done"}'` from another terminal).
3. **Await** — "Wait for the callback." → the agent calls `wait_for_callback` and blocks until the webhook lands, then receives `{ status: "received", request: { body, headers, … } }`.
4. **Verify** (optional) — set a webhook secret on the endpoint, then "Verify the signature." → `verify_signature` confirms the payload is authentic before the agent acts on it.
No polling, no dashboards, no copy-paste.
## Tools
| Tool | Description |
|---|---|
| `create_callback_endpoint` | Create a callback endpoint; returns the `callbackUrl` |
| `wait_for_callback` | Block until the next callback lands, then return it (`timeoutMs`, `after` cursor) |
| `list_callbacks` | List callbacks received by an endpoint (summary view) |
| `get_callback_payload` | Fetch one callback with full headers + decrypted body |
| `verify_signature` | Timing-safe HMAC check against the endpoint's configured secret |
| `replay_callback` | POST a received callback to any target URL |
| `list_endpoints` | List your endpoints |
| `get_endpoint` | Get one endpoint's full settings |
## Environment
| Variable | Default | Notes |
|---|---|---|
| `HOOKSENSE_TOKEN` | _(required)_ | API token from /account/tokens |
| `HOOKSENSE_API` | `https://hooksense.com` | Override for self-hosted/staging |
## Example agent prompts
> "Create a callback endpoint, use it as the webhook for my Replicate prediction, and wait for the result — then summarize the output."
> "Open a callback URL, give it to the approval step, and block until a human approves before continuing."
> "Wait for the next Stripe callback on `payments-prod`, verify its signature, and tell me the amount."
## License
MIT
