# For standalone agents

{% hint style="success" %}
This is the official documentation of the `@forestadmin/agent` Node.js agent.
{% endhint %}

When using a standalone agent, you can choose both the port and network adapter that your app should be exposed to.

Both parameters of the `mountOnStandaloneServer(port, host)` are optional:

* the `port` defaults to `3351` or to the `PORT` environment variable (which is required for Heroku deployments).
* the `host` defaults to the unspecified IPv6 address (`::`) when IPv6 is available, or the unspecified IPv4 address (`0.0.0.0`) otherwise.

```javascript
require('dotenv').config();

const { createAgent } = require('@forestadmin/agent');

const agent = createAgent({
  authSecret: process.env.FOREST_AUTH_SECRET,
  envSecret: process.env.FOREST_ENV_SECRET,
  isProduction: process.env.NODE_ENV === 'production',
});

await agent.mountOnStandaloneServer(3000, '127.0.0.1').start();
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.forestadmin.com/developer-guide-agents-nodejs/getting-started/install/expose-an-http-endpoint/using-standalone.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.