> ## Documentation Index
> Fetch the complete documentation index at: https://novu-c5de82d9-docs-homepage-redesign.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Client

> Learn how to configure and use the Novu Framework Client for managing global settings

The `Client` is an optional Class you can pass to the `serve` function to override some global settings.
By default, we will inject a new instance of the `Client` class in your `serve` method with the following defaults:

## Client Interface

### secretKey

* **Type**: `string`
* **Default**: `process.env.NOVU_SECRET_KEY`
* **Description**: Your Novu Secret Key, used to sign the HMAC header to guarantee the authenticity of our requests.

### strictAuthentication

* **Type**: `boolean`
* **Default**: `process.env.NODE_ENV !== 'development'`
* **Description**: This bypasses the HMAC signature verification, required for local development and testing against [Local Studio](/framework/studio).

### verbose

* **Type**: `boolean`
* **Default**: `true` in development, `false` in production
* **Description**: Enable verbose logging for workflow discovery and execution. When set to `false`, discovery and execution logs are suppressed.

### logger

* **Type**: `Logger`
* **Default**: The global `console`
* **Description**: A custom logger for all framework internal logging — workflow discovery, execution, and bridge error reporting. The interface uses `info`, `warn`, and `error` methods, so the global `console` and common structured loggers (pino, winston, and similar) work without an adapter. The `verbose` option controls whether discovery and execution logs are emitted; `logger` controls where all logs are written. Bridge errors (HTTP status >= 500) are always logged via this logger, regardless of `verbose`.

## Environment Variables

Unless specified in the `Client` constructor the `Client` class will look for the following environment variables:

* `NOVU_SECRET_KEY` - Your Novu Secret Key
* `NOVU_API_URL` - Defaults to `https://api.novu.co`. For EU customers, this should be set to `https://eu.api.novu.co`.

## Development Environment

When your service is running in development mode `process.env.NODE_ENV=development`, the following rules will auto apply:

* `strictAuthentication` will be set to `false`.

## Code Example

```tsx theme={null}
import { Client as NovuFrameworkClient } from '@novu/framework';
import { serve } from '@novu/framework/next';
import { passwordResetWorkflow } from './workflows';

export const { GET, POST, OPTIONS } = serve({
  client: new NovuFrameworkClient({
    secretKey: process.env.NOVU_SECRET_KEY,
    strictAuthentication: false,
    verbose: process.env.NODE_ENV === 'development',
    logger: console,
  }),
  workflows: [
    /* all workflows */
    passwordResetWorkflow,
  ],
});
```