# API v4

Use this documentation to explore the parcelLab API v4 Enhanced, learn about authentication, API versioning, error handling, and alternative integration methods.

{% hint style="info" %}
API v4 is the default and recommended integration path.

Use the parcelLab API v2 LTS only if you already have an existing integration. For further information, see the [API v2 LTS documentation](https://docs.parcellab.com/docs/developers/v2/).
{% endhint %}

## Getting Started

Select from the following to help you get started with the parcelLab platform.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Quickstart Guide</strong></td><td>Follow our setup guide and make your first API call with ease.</td><td><a href="/files/3CCdbKVtPO9zokf0GJwa">/files/3CCdbKVtPO9zokf0GJwa</a></td><td><a href="/pages/HLywxwNzaGSnmZfDGHxh">/pages/HLywxwNzaGSnmZfDGHxh</a></td></tr><tr><td><strong>API Reference</strong></td><td>Explore our API v4 Enhanced reference to learn about the available endpoints.</td><td><a href="/files/1roWiQd7MfO8lacFJbOR">/files/1roWiQd7MfO8lacFJbOR</a></td><td><a href="/pages/cp62v9Dyn4pKa7RRHTv2">/pages/cp62v9Dyn4pKa7RRHTv2</a></td></tr><tr><td><strong>Authentication</strong></td><td>Find out how to authenticate with the parcelLab API.</td><td><a href="/files/f3kgx71jXJRs7CDWnV0F">/files/f3kgx71jXJRs7CDWnV0F</a></td><td><a href="/pages/0BbukwI3SMDfHUTJBAeT">/pages/0BbukwI3SMDfHUTJBAeT</a></td></tr><tr><td><strong>Error Codes</strong></td><td>See how errors are handled when an API request fails.</td><td><a href="/files/WeJtBXqf009lyacfupH4">/files/WeJtBXqf009lyacfupH4</a></td><td><a href="/pages/eOvSOFWyxEIfDpfL6kfP">/pages/eOvSOFWyxEIfDpfL6kfP</a></td></tr></tbody></table>


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# 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.parcellab.com/docs/developers/readme.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.