# 4N NextDay API

> REST API to create shipping orders, print labels, quote rates and track deliveries with 4 Nortes (Chile), plus signed webhooks for delivery events.

- Base URL: `https://api.4nortes.app/api/v1`
- Auth: `Authorization: Bearer {token}`; merchant tokens are issued by 4 Nortes.
- Every page below is plain Markdown. The full documentation in one file is at https://api-doc.4nortes.app/llms-full.txt.

## Getting Started
- [Introduction](https://api-doc.4nortes.app/index.md): Connect your system to 4N NextDay and automate your shipping. Sync orders, print labels, and track deliveries without manual work.
- [Quickstart](https://api-doc.4nortes.app/quickstart.md): Connect your first order to 4N NextDay. Learn how to sync orders from your system automatically.
- [Authentication](https://api-doc.4nortes.app/authentication.md): Authenticate with the 4N NextDay API using the bearer token issued for your merchant account.
- [SDKs](https://api-doc.4nortes.app/sdks.md): Code examples and helpers to connect your system to 4N NextDay faster.

## Core Concepts
- [Orders](https://api-doc.4nortes.app/orders.md): Understand how orders work in 4N NextDay. Same statuses you see in your panel, now synced with your system.
- [Tracking](https://api-doc.4nortes.app/tracking.md): Get the same tracking info you see in your panel. Show customers where their package is, right in your app.
- [Localities & Regions](https://api-doc.4nortes.app/localities.md): Validate delivery coverage before customers check out. Show them if their comuna is covered.
- [Services](https://api-doc.4nortes.app/services.md): The delivery services configured for your account, and how to pick one when you create an order.

## API Reference
- [Orders API](https://api-doc.4nortes.app/api/orders.md): Sync orders from your system, download labels, and manage shipments - all the panel actions, automated.
- [Tracking API](https://api-doc.4nortes.app/api/tracking.md): Fetch tracking info for your customers. Same data you see in your panel, in your app.
- [References API](https://api-doc.4nortes.app/api/references.md): Get regions, comunas and your services, and quote a shipment before you create it.

## Resources
- [Webhooks](https://api-doc.4nortes.app/webhooks.md): Get notified when orders update - no more checking your panel manually.
- [Error Handling](https://api-doc.4nortes.app/errors.md): What to do when something goes wrong. Status codes, the response shapes you will actually see, and how to handle them.
- [Pagination](https://api-doc.4nortes.app/pagination.md): Learn how to work with the paginated order list when querying the 4N NextDay API.

## Optional
- [Full documentation](https://api-doc.4nortes.app/llms-full.txt): every page concatenated