# Introduction

> Integrate your systems with Melonn's fulfillment platform.

The Melonn API lets sellers integrate their systems with the services Melonn offers: creating and tracking sell orders, managing products, checking inventory, sending merchandise to our warehouses and handling buyer returns.

This guide covers:

- The **available functionality**, grouped by domain in the [API reference](/api-reference/sell-orders/create-sell-order).
- The **reference data** you need to build requests, such as warehouse and shipping method codes.
- The **webhooks** you can subscribe to, so your systems are notified when something changes.

<CardGroup cols={2}>
  <Card title="Authentication" icon="key" href="/authentication">
    Generate your API key and send it with every request.
  </Card>
  <Card title="Environments" icon="flask" href="/environments">
    Test your integration in the sandbox before going live.
  </Card>
  <Card title="Reference data" icon="table" href="/catalogs">
    Warehouses, shipping methods, VAS and official destinations.
  </Card>
  <Card title="Webhooks" icon="bell" href="/webhooks/overview">
    Receive events at your own URL.
  </Card>
</CardGroup>

<Tip>
  Building with an AI coding agent? Point it to `/llms.txt` on this site, an index of every page, or give it `/openapi.yaml`, the complete contract with every endpoint, schema and webhook event.
</Tip>

## Concepts and definitions

<AccordionGroup>
  <Accordion title="Bundle">
    Grouping multiple items into a single SKU. This allows you to set up your sales channel selling a single SKU but have your inventory unconsolidated in Melonn. It does not imply that Melonn has to consolidate these items in any particular way during packaging.
  </Accordion>
  <Accordion title="CEDIS">
    Melonn distribution centers, warehouses or storage facilities.
  </Accordion>
  <Accordion title="Shipping method">
    Used to deliver an order from the warehouse to the final destination. Each shipping method determines the carrier, delivery time frame, and logistics conditions (for example, same-day delivery, standard delivery, pickup, or express service).
  </Accordion>
  <Accordion title="Destination">
    Your own stores, retailers or distributors to whom you send merchandise with B2B orders. Each of them may have one or more delivery points.
  </Accordion>
  <Accordion title="D2C orders">
    Orders usually placed by an individual customer, typically with a low quantity of items.
  </Accordion>
  <Accordion title="Kit">
    A bundle that also includes some additional packaging preparation, such as placing items in a box or bag, closing with a sticker, or heat shrinking.
  </Accordion>
  <Accordion title="VAS - Value added services">
    Services on top of the traditional fulfillment concepts of storage, preparation and transportation. See the [VAS catalog](/catalogs#vas-value-added-services).
  </Accordion>
</AccordionGroup>

<Note>
  You can find more material about integrating with Melonn in [Learn with Melonn](https://melonn.notion.site/Integraciones-c61249d272b6450b82422476854b96b7).
</Note>