---
title: "Hono"
description: "Learn how to set up Sentry in your Hono app and capture your first errors."
url: https://docs.sentry.io/platforms/javascript/guides/hono/
---

# Hono | Sentry for Hono

##### Beta

This SDK is currently in **beta**. Beta features are still in progress and may have bugs. Please reach out on [GitHub](https://github.com/getsentry/sentry-javascript/issues/new/choose) if you have any feedback or concerns

The `@sentry/hono` SDK supports Hono 4+ across multiple runtimes: Cloudflare Workers, Node.js, and Bun. It works as Hono middleware, so you can drop it into your existing app with minimal setup.

Are you using @hono/sentry?

The community middleware `@hono/sentry` has been deprecated in favor of `@sentry/hono`, which provides better performance and more features. To migrate:

1. Uninstall `@hono/sentry` and `toucan-js`
2. Follow the install and configure steps below for your runtime
3. Replace the old middleware with the new `sentry()` middleware

## [Prerequisites](https://docs.sentry.io/platforms/javascript/guides/hono.md#prerequisites)

You need:

* A Sentry [account](https://sentry.io/signup/) and [project](https://docs.sentry.io/product/projects.md)
* Your application up and running
* Hono version `4.0.0` or above

## [Install](https://docs.sentry.io/platforms/javascript/guides/hono.md#install)

Choose the features you want to configure, and this guide will show you how:

Error Monitoring\[ ]Tracing\[ ]Profiling\[ ]Logs

Want to learn more about these features?

* [**Issues**](https://docs.sentry.io/product/issues.md) (always enabled)
  <!-- -->
  :
  <!-- -->
  Sentry's core error monitoring product that automatically reports errors, uncaught exceptions, and unhandled rejections. If you have something that looks like an exception, Sentry can capture it.
* [**Tracing**](https://docs.sentry.io/product/tracing.md):
  <!-- -->
  Track software performance while seeing the impact of errors across multiple systems. For example, distributed tracing allows you to follow a request from the frontend to the backend and back.
* [**Profiling**](https://docs.sentry.io/product/explore/profiling.md):
  <!-- -->
  Gain deeper insight than traditional tracing without custom instrumentation, letting you discover slow-to-execute or resource-intensive functions in your app.
* [**Logs**](https://docs.sentry.io/product/explore/logs.md):
  <!-- -->
  Centralize and analyze your application logs to correlate them with errors and performance issues. Search, filter, and visualize log data to understand what's happening in your applications.

### [Install the Sentry SDK](https://docs.sentry.io/platforms/javascript/guides/hono.md#install-the-sentry-sdk)

Install the `@sentry/hono` package:

```bash
npm install @sentry/hono
```

### [Install the Peer Dependency for Your Runtime](https://docs.sentry.io/platforms/javascript/guides/hono.md#install-the-peer-dependency-for-your-runtime)

The SDK needs a runtime-specific peer dependency. Install the one that matches your environment and keep its version in sync with `@sentry/hono`. You won't import it directly, but it must be present in your project.

```bash
npm install @sentry/cloudflare
```

### [Install the Profiling Package (Node.js Only)](https://docs.sentry.io/platforms/javascript/guides/hono.md#install-the-profiling-package-nodejs-only)

Profiling is only available for the Node.js runtime. Install the `@sentry/profiling-node` package:

```bash
npm install @sentry/profiling-node --save
```

## [Configure](https://docs.sentry.io/platforms/javascript/guides/hono.md#configure)

Cloudflare Workers: Enable Node.js Compatibility

If you're deploying to Cloudflare Workers, set the `nodejs_compat` compatibility flag. The SDK needs `AsyncLocalStorage`, which requires this flag.

`wrangler.jsonc`

```jsonc
{
  "compatibility_flags": ["nodejs_compat"]
}
```

Node.js: Initialize Sentry Before Your App

Node.js requires Sentry to initialize before your application loads so it can instrument third-party libraries (like database clients). Create a separate initialization file:

`instrument.mjs`

```typescript
import * as Sentry from "@sentry/hono/node";
// ___PRODUCT_OPTION_START___ profiling
import { nodeProfilingIntegration } from "@sentry/profiling-node";
// ___PRODUCT_OPTION_END___ profiling

Sentry.init({
  dsn: "___PUBLIC_DSN___",

  // Adds request headers and IP for users, for more info visit:
  // https://docs.sentry.io/platforms/javascript/guides/hono/configuration/options/#sendDefaultPii
  sendDefaultPii: true,
  // ___PRODUCT_OPTION_START___ profiling

  integrations: [nodeProfilingIntegration()],
  // ___PRODUCT_OPTION_END___ profiling
  // ___PRODUCT_OPTION_START___ performance

  // Set tracesSampleRate to 1.0 to capture 100%
  // of spans for tracing.
  // We recommend adjusting this value in production
  // Learn more at
  // https://docs.sentry.io/platforms/javascript/guides/hono/configuration/options/#tracesSampleRate
  tracesSampleRate: 1.0,
  // ___PRODUCT_OPTION_END___ performance
  // ___PRODUCT_OPTION_START___ profiling

  // Set profilesSampleRate relative to tracesSampleRate
  // Learn more at
  // https://docs.sentry.io/platforms/javascript/configuration/options/#profileSessionSampleRate
  profileSessionSampleRate: 1.0,
  // ___PRODUCT_OPTION_END___ profiling
  // ___PRODUCT_OPTION_START___ logs

  // Enable logs to be sent to Sentry
  enableLogs: true,
  // ___PRODUCT_OPTION_END___ logs
});
```

Load this file with the `--import` flag when starting your app. You can also set this as an environment variable instead:

```bash
node --import ./instrument.mjs app.js
```

### [Add the Sentry Middleware](https://docs.sentry.io/platforms/javascript/guides/hono.md#add-the-sentry-middleware)

Add the `sentry()` middleware as early as possible in your Hono app.

Before continuing, make sure you've completed the runtime-specific steps above: **Cloudflare Workers** users need to enable Node.js compatibility, and **Node.js** users need to create the instrument file. Since Node.js initializes Sentry in that file, the middleware doesn't take any options.

`index.ts`

```typescript
import { Hono } from "hono";
import { sentry } from "@sentry/hono/cloudflare";

const app = new Hono();

app.use(
  sentry(app, {
    dsn: "___PUBLIC_DSN___",

    // Adds request headers and IP for users, for more info visit:
    // https://docs.sentry.io/platforms/javascript/guides/hono/configuration/options/#sendDefaultPii
    sendDefaultPii: true,
    // ___PRODUCT_OPTION_START___ performance

    // Set tracesSampleRate to 1.0 to capture 100%
    // of spans for tracing.
    tracesSampleRate: 1.0,
    // ___PRODUCT_OPTION_END___ performance
    // ___PRODUCT_OPTION_START___ logs

    // Enable logs to be sent to Sentry
    enableLogs: true,
    // ___PRODUCT_OPTION_END___ logs
  }),
);

// Your routes here

export default app;
```

Cloudflare Workers: Accessing env from Worker Bindings

To access environment variables from your Cloudflare Worker bindings (for example, to store the DSN as a secret), pass a callback instead of a plain options object. The function receives the Worker `env`:

`index.ts`

```typescript
import { Hono } from "hono";
import { sentry } from "@sentry/hono/cloudflare";

type Bindings = { SENTRY_DSN: string };

const app = new Hono<{ Bindings: Bindings }>();

app.use(sentry(app, (env) => ({ dsn: env.SENTRY_DSN })));

export default app;
```

### [Report Unhandled Exceptions](https://docs.sentry.io/platforms/javascript/guides/hono.md#report-unhandled-exceptions)

By default, Sentry captures exceptions from Hono's `onError` handler, excluding errors with 3xx or 4xx status codes. No additional configuration is needed for this.

### [Add Readable Stack Traces With Source Maps (Optional)](https://docs.sentry.io/platforms/javascript/guides/hono.md#add-readable-stack-traces-with-source-maps-optional)

The stack traces in your Sentry errors probably won't look like your actual code without unminifying them. To fix this, upload your source maps to Sentry. The easiest way to do this is by using the Sentry Wizard.

Alternatively, take a look at our [Uploading Source Maps](https://docs.sentry.io/platforms/javascript/guides/hono/sourcemaps/uploading.md) documentation.

```bash
npx @sentry/wizard@latest -i sourcemaps
```

## [Verify Your Setup](https://docs.sentry.io/platforms/javascript/guides/hono.md#verify-your-setup)

### [Issues](https://docs.sentry.io/platforms/javascript/guides/hono.md#issues)

First, let's verify that Sentry captures errors and creates issues in your Sentry project. Add the following code snippet to your main application file, adding a route that triggers an error that Sentry will capture:

```javascript
app.get("/debug-sentry", () => {
  throw new Error("My first Sentry error!");
});
```

### [Tracing](https://docs.sentry.io/platforms/javascript/guides/hono.md#tracing)

To test your tracing configuration, update the previous code snippet by starting a trace to measure the time it takes for the execution of your code:

```javascript
app.get("/debug-sentry", async () => {
  await Sentry.startSpan(
    {
      op: "test",
      name: "My First Test Transaction",
    },
    async () => {
      await new Promise((resolve) => setTimeout(resolve, 100)); // Wait for 100ms
      throw new Error("My first Sentry error!");
    },
  );
});
```

### [Logs NEW](https://docs.sentry.io/platforms/javascript/guides/hono.md#logs-)

To verify that Sentry catches your logs, add some log statements to your application:

```javascript
Sentry.logger.info("User example action completed");

Sentry.logger.warn("Slow operation detected", {
  operation: "data_fetch",
  duration: 3500,
});

Sentry.logger.error("Validation failed", {
  field: "email",
  reason: "Invalid email",
});
```

### [View Captured Data in Sentry](https://docs.sentry.io/platforms/javascript/guides/hono.md#view-captured-data-in-sentry)

Now, head over to your project on [Sentry.io](https://sentry.io/) to view the collected data (it takes a couple of moments for the data to appear).

Need help locating the captured errors in your Sentry project?

* Open the
  <!-- -->
  [**Issues**](https://sentry.io/orgredirect/organizations/:orgslug/issues/)
  <!-- -->
  page and select an error from the issues list to view the full details and context of this error. For more details, see this
  <!-- -->
  [interactive walkthrough](https://docs.sentry.io/product/sentry-basics/integrate-frontend/generate-first-error.md#ui-walkthrough).
* Open the
  <!-- -->
  [**Traces**](https://sentry.io/orgredirect/organizations/:orgslug/explore/traces/)
  <!-- -->
  page and select a trace to reveal more information about each span, its duration, and any errors. For an interactive UI walkthrough, click
  <!-- -->
  [here](https://docs.sentry.io/product/sentry-basics/distributed-tracing/generate-first-error.md#ui-walkthrough).
* Open the
  <!-- -->
  [**Profiles**](https://sentry.io/orgredirect/organizations/:orgslug/profiling/)
  <!-- -->
  page, select a transaction, and then a profile ID to view its flame graph. For more information, click
  <!-- -->
  [here](https://docs.sentry.io/product/explore/profiling/profile-details.md).
* Open the
  <!-- -->
  [**Logs**](https://sentry.io/orgredirect/organizations/:orgslug/explore/logs/)
  <!-- -->
  page and filter by service, environment, or search keywords to view log entries from your application. For an interactive UI walkthrough, click
  <!-- -->
  [here](https://docs.sentry.io/product/explore/logs.md#overview).

## [Next Steps](https://docs.sentry.io/platforms/javascript/guides/hono.md#next-steps)

At this point, you should have Sentry integrated into your Hono application and already be sending data to your Sentry project.

Now's a good time to customize your setup and look into more advanced topics:

* Explore [practical guides](https://docs.sentry.io/guides.md) on what to monitor, log, track, and investigate after setup
* Learn how to [manually capture errors](https://docs.sentry.io/platforms/javascript/guides/hono/usage.md)
* Continue to [customize your configuration](https://docs.sentry.io/platforms/javascript/guides/hono/configuration.md)
* Get familiar with [Sentry's product features](https://docs.sentry.io/product.md) like tracing, insights, and alerts

Are you having problems setting up the SDK?

* Find various topics in [Troubleshooting](https://docs.sentry.io/platforms/javascript/guides/hono/troubleshooting.md)
* [Get support](https://sentry.zendesk.com/hc/en-us/)

## Other JavaScript Frameworks

- [Angular](https://docs.sentry.io/platforms/javascript/guides/angular.md)
- [Astro](https://docs.sentry.io/platforms/javascript/guides/astro.md)
- [AWS Lambda](https://docs.sentry.io/platforms/javascript/guides/aws-lambda.md)
- [Azure Functions](https://docs.sentry.io/platforms/javascript/guides/azure-functions.md)
- [Bun](https://docs.sentry.io/platforms/javascript/guides/bun.md)
- [Capacitor](https://docs.sentry.io/platforms/javascript/guides/capacitor.md)
- [Cloud Functions for Firebase](https://docs.sentry.io/platforms/javascript/guides/firebase.md)
- [Cloudflare](https://docs.sentry.io/platforms/javascript/guides/cloudflare.md)
- [Connect](https://docs.sentry.io/platforms/javascript/guides/connect.md)
- [Cordova](https://docs.sentry.io/platforms/javascript/guides/cordova.md)
- [Deno](https://docs.sentry.io/platforms/javascript/guides/deno.md)
- [Effect](https://docs.sentry.io/platforms/javascript/guides/effect.md)
- [Electron](https://docs.sentry.io/platforms/javascript/guides/electron.md)
- [Elysia](https://docs.sentry.io/platforms/javascript/guides/elysia.md)
- [Ember](https://docs.sentry.io/platforms/javascript/guides/ember.md)
- [Express](https://docs.sentry.io/platforms/javascript/guides/express.md)
- [Fastify](https://docs.sentry.io/platforms/javascript/guides/fastify.md)
- [Gatsby](https://docs.sentry.io/platforms/javascript/guides/gatsby.md)
- [Google Cloud Functions](https://docs.sentry.io/platforms/javascript/guides/gcp-functions.md)
- [Hapi](https://docs.sentry.io/platforms/javascript/guides/hapi.md)
- [Koa](https://docs.sentry.io/platforms/javascript/guides/koa.md)
- [Nest.js](https://docs.sentry.io/platforms/javascript/guides/nestjs.md)
- [Next.js](https://docs.sentry.io/platforms/javascript/guides/nextjs.md)
- [Nitro](https://docs.sentry.io/platforms/javascript/guides/nitro.md)
- [Node.js](https://docs.sentry.io/platforms/javascript/guides/node.md)
- [Nuxt](https://docs.sentry.io/platforms/javascript/guides/nuxt.md)
- [React](https://docs.sentry.io/platforms/javascript/guides/react.md)
- [React Router Framework](https://docs.sentry.io/platforms/javascript/guides/react-router.md)
- [Remix](https://docs.sentry.io/platforms/javascript/guides/remix.md)
- [Solid](https://docs.sentry.io/platforms/javascript/guides/solid.md)
- [SolidStart](https://docs.sentry.io/platforms/javascript/guides/solidstart.md)
- [Svelte](https://docs.sentry.io/platforms/javascript/guides/svelte.md)
- [SvelteKit](https://docs.sentry.io/platforms/javascript/guides/sveltekit.md)
- [TanStack Start React](https://docs.sentry.io/platforms/javascript/guides/tanstackstart-react.md)
- [Vue](https://docs.sentry.io/platforms/javascript/guides/vue.md)
- [Wasm](https://docs.sentry.io/platforms/javascript/guides/wasm.md)

## Topics

- [Capturing Errors](https://docs.sentry.io/platforms/javascript/guides/hono/usage.md)
- [Source Maps](https://docs.sentry.io/platforms/javascript/guides/hono/sourcemaps.md)
- [Logs](https://docs.sentry.io/platforms/javascript/guides/hono/logs.md)
- [Tracing](https://docs.sentry.io/platforms/javascript/guides/hono/tracing.md)
- [AI Agent Monitoring](https://docs.sentry.io/platforms/javascript/guides/hono/ai-agent-monitoring.md)
- [Application Metrics](https://docs.sentry.io/platforms/javascript/guides/hono/metrics.md)
- [Profiling](https://docs.sentry.io/platforms/javascript/guides/hono/profiling.md)
- [Crons](https://docs.sentry.io/platforms/javascript/guides/hono/crons.md)
- [User Feedback](https://docs.sentry.io/platforms/javascript/guides/hono/user-feedback.md)
- [Sampling](https://docs.sentry.io/platforms/javascript/guides/hono/sampling.md)
- [Enriching Events](https://docs.sentry.io/platforms/javascript/guides/hono/enriching-events.md)
- [Extended Configuration](https://docs.sentry.io/platforms/javascript/guides/hono/configuration.md)
- [OpenTelemetry Support](https://docs.sentry.io/platforms/javascript/guides/hono/opentelemetry.md)
- [Feature Flags](https://docs.sentry.io/platforms/javascript/guides/hono/feature-flags.md)
- [Data Management](https://docs.sentry.io/platforms/javascript/guides/hono/data-management.md)
- [Security Policy Reporting](https://docs.sentry.io/platforms/javascript/guides/hono/security-policy-reporting.md)
- [Migration Guide](https://docs.sentry.io/platforms/javascript/guides/hono/migration.md)
- [Troubleshooting](https://docs.sentry.io/platforms/javascript/guides/hono/troubleshooting.md)