# MaintainX Webhooks

## When to Use This Skill

* How do I receive MaintainX webhooks?
* How do I verify the `x-maintainx-webhook-body-signature` header?
* How do I handle `NEW_WORK_ORDER` or `WORK_ORDER_STATUS_CHANGE` events?
* Why is my MaintainX webhook signature verification failing?
* Setting up MaintainX webhook handlers with replay protection

## Verification (core)

MaintainX sends two headers on every webhook: **`x-maintainx-webhook-body-signature`**
and `x-maintainx-webhook-uri-signature`. Both have the form `t=<unix>,v1=<hex>`.
Verify the **body signature**: `v1` is a hex `HMAC-SHA256` over
`{t}.{raw body}`, keyed with the webhook's secret (MaintainX **Settings >
Integrations > Copy secret**, used as a raw string). The URI signature uses the
same format over the full URI and is an optional extra. MaintainX has no SDK
verification helper, so verify manually against the **raw** body (don't
`JSON.parse` first). The docs recommend rejecting timestamps older than 5 minutes,
but retries and replays (including Hookdeck's) carry the original timestamp, so the
examples make that window opt-in (`MAINTAINX_TIMESTAMP_TOLERANCE_SECONDS`, default `0`).

```javascript
const crypto = require('crypto');

// toleranceSec = 0 (default) skips the timestamp window; a positive value opts in
function verifyMaintainxSignature(rawBody, header, secret, toleranceSec = 0) {
  const parts = Object.fromEntries(header.split(',').map((p) => p.split('=')));
  const { t: timestamp, v1: signature } = parts;
  if (!timestamp || !signature) return false;
  if (!/^\d+$/.test(timestamp)) return false;
  if (toleranceSec > 0 && Math.abs(Math.floor(Date.now() / 1000) - Number(timestamp)) > toleranceSec) return false;

  const expected = crypto
    .createHmac('sha256', secret)
    .update(`${timestamp}.${rawBody}`, 'utf8') // signed content = t + "." + raw body
    .digest('hex');

  try {
    return crypto.timingSafeEqual(Buffer.from(signature, 'hex'), Buffer.from(expected, 'hex'));
  } catch {
    return false; // length mismatch = invalid
  }
}

```

> **For complete handlers with route wiring, event dispatch, and tests**, see:
> 
> * [examples/express/](https://github.com/hookdeck/webhook-skills/tree/main/skills/maintainx-webhooks/examples/express/)
> * [examples/nextjs/](https://github.com/hookdeck/webhook-skills/tree/main/skills/maintainx-webhooks/examples/nextjs/)
> * [examples/fastapi/](https://github.com/hookdeck/webhook-skills/tree/main/skills/maintainx-webhooks/examples/fastapi/)

## Common Event Types

The event name is the `eventType` field in the JSON body (it matches the
subscription's type).

| Event | Triggered When |
| --- | --- |
| `NEW_WORK_ORDER` | A work order is created |
| `WORK_ORDER_CHANGE` | A work order's properties, assignees, or teams change |
| `WORK_ORDER_STATUS_CHANGE` | A work order moves between OPEN, IN_PROGRESS, ON_HOLD, and DONE |
| `NEW_WORK_REQUEST` | A work request is submitted |
| `ASSET_STATUS_CHANGE` | An asset goes ONLINE, OFFLINE, or changes custom status |

> **For the full event list** (assets, parts, purchase orders, users, and more), see [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/maintainx-webhooks/references/overview.md) and [MaintainX's webhook documentation](https://help.getmaintainx.com/build/webhooks).

## Environment Variables

```bash
# Secret from MaintainX Settings > Integrations > Webhooks > Copy secret
MAINTAINX_WEBHOOK_SECRET=your_webhook_secret_here
# Optional replay window in seconds; 0 (default) is off, a positive value opts in
MAINTAINX_TIMESTAMP_TOLERANCE_SECONDS=0

```

## Local Development

```bash
# Start tunnel (no account needed)
npx hookdeck-cli listen 3000 maintainx --path /webhooks/maintainx

```

## Reference Materials

* [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/maintainx-webhooks/references/overview.md) - What MaintainX webhooks are, common events
* [references/setup.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/maintainx-webhooks/references/setup.md) - Creating a webhook, getting the secret
* [references/verification.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/maintainx-webhooks/references/verification.md) - Signature verification details and gotchas