# Inventory Resources

Use Inventory Resources to retrieve and manage services related to your DIDWW account.

These resources cover account balance, orders, purchased DIDs, DID history, inbound
routing, outbound routing, and capacity management.

## Resource overview

| Resource | Use it to |
| --- | --- |
| [Balance](balance/index.html) | Retrieve the current account balance. |
| [Orders](order/index.html) | Create, retrieve, list, or cancel DID orders. |
| [DID](did/index.html) | Retrieve and update purchased DIDs. |
| [DID History](did-history/index.html) | Retrieve historical DID records. |
| [Inbound Trunks](voice-in-trunks/index.html) | Configure inbound voice routing destinations. |
| [Inbound Trunk Group](voice-in-trunk-groups/index.html) | Group inbound trunks for routing and failover. |
| [Outbound Trunks](voice-out-trunks/index.html) | Configure outbound SIP trunking services. |
| [Capacity Pool](capacity-pool/index.html) | Manage assigned capacity pools. |
| [Shared Capacity Group](shared-capacity-group/index.html) | Create and manage shared capacity groups. |

## Common workflows

### Place an order

Use [Orders](order/index.html) after selecting available inventory from
[Coverage Resources](../coverage-resources/index.html).

Recommended resources:

- [Balance](balance/index.html)
- [Orders](order/index.html)
- [DID](did/index.html)

### Manage purchased DIDs

Use DID resources to retrieve existing numbers and update their service configuration.

Recommended resources:

- [DID](did/index.html)
- [DID History](did-history/index.html)
- [Inbound Trunks](voice-in-trunks/index.html)
- [Inbound Trunk Group](voice-in-trunk-groups/index.html)

### Configure inbound routing

Use inbound trunks and trunk groups to control where incoming calls are routed.

Recommended resources:

- [Inbound Trunks](voice-in-trunks/index.html)
- [Inbound Trunk Group](voice-in-trunk-groups/index.html)
- [DID](did/index.html)

### Manage inbound capacity

Use capacity pools and shared capacity groups to manage channel capacity for inbound
voice services.

Recommended resources:

- [Capacity Pool](capacity-pool/index.html)
- [Shared Capacity Group](shared-capacity-group/index.html)

### Configure outbound services

Use outbound trunks to configure and manage outbound SIP services.

Recommended resources:

- [Outbound Trunks](voice-out-trunks/index.html)

## Related resources

Inventory Resources are commonly used with other DIDWW API resource groups.

- [Coverage Resources](../coverage-resources/index.html) - Search inventory before
  creating an order.
- [Regulation Resources](../regulation-resources/index.html) - Provide required identity,
  address, and proof information.
- [Emergency Resources](../emergency-resources/index.html) - Configure emergency calling
  services where required.

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