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

# Installing Unified APIs

> Browse and install Unified APIs from the catalog

## Browse Available APIs

View all Unified APIs in the Catalog:

```
https://ipaas.usehandled.io/catalog/unified-apis
```

### Categories

| Category  | Resources                    |
| --------- | ---------------------------- |
| WMS       | orders, inventory, shipments |
| Ecommerce | products, orders, customers  |
| Shipping  | rates, labels, tracking      |
| CRM       | contacts, companies, deals   |
| Finance   | invoices, payments           |

## Install a Unified API

<Steps>
  <Step title="Browse Catalog">
    Go to **Catalog > Unified APIs**
  </Step>

  <Step title="Find Category">
    Find the category you need
  </Step>

  <Step title="Install">
    Click **Install**
  </Step>
</Steps>

The Unified API is now available for all integrations in that category.

## View Resources and Schema

Each Unified API includes:

| Component     | Description                                                         |
| ------------- | ------------------------------------------------------------------- |
| **Resources** | Available data endpoints (e.g., `orders`, `inventory`, `shipments`) |
| **Schema**    | Data structure for each resource                                    |
| **Mappings**  | How data from each integration maps to the unified format           |

### Access Resource Details

<Steps>
  <Step title="Open Unified APIs">
    Go to **Unified APIs** (Catalog or Installed)
  </Step>

  <Step title="Select API">
    Click on a Unified API
  </Step>

  <Step title="View Details">
    Select a resource to view schema definition, supported integrations, and field mappings
  </Step>
</Steps>

## Custom Unified APIs

Need a schema that doesn't exist? Create your own:

1. Go to **Catalog**
2. Click **Create Unified API**
3. Define resources and schemas
4. Add mappings for your integrations

See [Creating Unified APIs](/unified-apis/creating-unified-apis) for details.