> ## Documentation Index
> Fetch the complete documentation index at: https://docs.automate.ax/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Automate.ax automations are TypeScript programs.
> Use Bun for installation and command examples.
> Use Automate.ax for the product name and automate.ax for the package, CLI, and domain.
> Treat documented public APIs as current; do not invent transitional or deprecated names.

# On Vercel domain certificate deleted

> Run an automation when Vercel reports domain certificate deleted.

`vercel.onDomainCertificateDeleted` starts an automation for the corresponding Vercel webhook event.

```ts automations/on-domain-certificate-deleted.automation.ts theme={null}
import { automation } from "automate.ax"
import { vercel } from "automate.ax/vercel"

export default automation("On Vercel domain certificate deleted", () => {
  const event = vercel.onDomainCertificateDeleted()
  event.transform(({ payload }) => payload.cert)
})
```

## Input

The trigger accepts optional static `account` selection. Without it, Automate.ax uses the project's Vercel OAuth binding.

## Output

The event includes `id`, `createdAt`, `region`, its exact `type` discriminator, and a typed `payload`. `payload.cert` contains Vercel's deleted certificate details.

## Provider behavior

Automate.ax verifies Vercel's signature, routes the event to the matching installation, and deduplicates the delivery by event ID.