---
title: 'Monitoring with Sentry'
description: 'Monitor Edge Functions with the Sentry Deno SDK.'
---

Add the [Sentry Deno SDK](https://docs.sentry.io/platforms/javascript/guides/deno/) to your Supabase Edge Functions to track exceptions and get notified of errors or performance issues.

### Prerequisites

- [Create a Sentry account](https://sentry.io/signup/).
- Make sure you have the latest version of the [Supabase CLI](/docs/guides/cli#installation) installed.

### 1. Create Supabase function

Create a new function locally:

```bash
supabase functions new sentryfied
```

### 2. Add the Sentry Deno SDK

Handle exceptions within your function and send them to Sentry.

```tsx
import * as Sentry from 'https://deno.land/x/sentry/index.mjs'

Sentry.init({
  // https://docs.sentry.io/product/sentry-basics/concepts/dsn-explainer/#where-to-find-your-dsn
  dsn: SENTRY_DSN,
  defaultIntegrations: false,
  // Performance Monitoring
  tracesSampleRate: 1.0,
  // Set sampling rate for profiling - this is relative to tracesSampleRate
  profilesSampleRate: 1.0,
})

// Set region and execution_id as custom tags
Sentry.setTag('region', Deno.env.get('SB_REGION'))
Sentry.setTag('execution_id', Deno.env.get('SB_EXECUTION_ID'))

Deno.serve(async (req) => {
  try {
    const { name } = await req.json()
    // This will throw, as `name` in our example call will be `undefined`
    const data = {
      message: `Hello ${name}!`,
    }

    return new Response(JSON.stringify(data), { headers: { 'Content-Type': 'application/json' } })
  } catch (e) {
    Sentry.captureException(e)
    // Flush Sentry before the running process closes
    await Sentry.flush(2000)
    return new Response(JSON.stringify({ msg: 'error' }), {
      status: 500,
      headers: { 'Content-Type': 'application/json' },
    })
  }
})
```

### 3. Deploy and test

Run function locally:

```bash
supabase start
supabase functions serve --no-verify-jwt
```

Test it: http://localhost:54321/functions/v1/sentryfied

Deploy function to Supabase:

```bash
supabase functions deploy sentryfied --no-verify-jwt
```

### 4. Try it yourself

Find the complete example on [GitHub](https://github.com/supabase/supabase/tree/master/examples/edge-functions/supabase/functions/sentryfied/index.ts).

## Working with scopes

Sentry Deno SDK currently do not support `Deno.serve` instrumentation, which means that there is no scope separation between requests. Because of that, when the Edge Functions runtime is reused between multiple requests, all globally captured breadcrumbs and contextual data will be shared, which is not the desired behavior. To work around this, all default integrations in the example code above are disabled, and you should be relying on [`withScope`](https://docs.sentry.io/platforms/javascript/enriching-events/scopes/#using-withscope) to encapsulate all Sentry SDK API calls, or [pass context directly](https://docs.sentry.io/platforms/javascript/enriching-events/context/#passing-context-directly) to the `captureException` or `captureMessage` calls.
