> ## Documentation Index
> Fetch the complete documentation index at: https://docs.paubox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# General information

> Base URL, authentication, date formats, and response codes for the Paubox Email API.

If you're not sure where to start, visit the [Quickstart guide](/email-api/quickstart). To set up credentials, see [Authentication](/email-api/authentication).

## Base URL

`https://api.paubox.net/v1/YOUR_USERNAME`

Replace `YOUR_USERNAME` with your API endpoint username, shown on the [Paubox Email API > Settings](https://next.paubox.com/emailapi/settings) page.

## Authorization

Pass your API key as a Bearer token in every request:

`Authorization: Bearer YOUR_API_KEY`

The legacy format `Authorization: Token token=YOUR_API_KEY` is also accepted. Bearer is preferred.

## Date format

Dates are passed as strings formatted to RFC 2822 standards e.g. "Fri, 16 Feb 2018 13:00:00 GMT"

## Standard HTTP response codes

| **Status Code**    | **Status Message** |
| :----------------- | :----------------- |
| 200                | Service Ok         |
| 400                | Bad Request        |
| 401                | Unauthorized       |
| 404                | Not Found          |
| 500, 502, 503, 504 | Server Error       |