> ## 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 deployment failed

> Start an automation when a Vercel deployment fails.

`onVercelDeploymentFailed` emits failed Vercel deployments without requiring a check for the provider's `deployment.error` discriminator.

```ts automations/watch-failed-vercel-deployments.automation.ts theme={null}
import { automation } from "automate.ax"
import { onVercelDeploymentFailed } from "automate.ax/vercel"

export default automation("Watch failed Vercel deployments", () => {
  const event = onVercelDeploymentFailed()
  event.transform(({ payload }) => ({
    deploymentId: payload.deployment.id,
    projectId: payload.project.id,
    url: payload.deployment.url,
  }))
})
```

Optional static `account` defaults to the project's Vercel OAuth binding.

## Trigger data

Returns the [deployment event shape](/reference/integrations/vercel/triggers/on-deployment-event), narrowed to `type: "deployment.error"`. Vercel calls failed deployment webhooks `deployment.error`; the Automate.ax callable uses the clearer “failed” name.