# AzureCosmosDBResource.addCosmosDatabase

- Module: [Aspire.Hosting.Azure.CosmosDB](/reference/api/typescript/aspire.hosting.azure.cosmosdb.md)
- Defined on: [AzureCosmosDBResource](/reference/api/typescript/aspire.hosting.azure.cosmosdb/azurecosmosdbresource.md)
- Version: `13.4.0`
- Kind: `method`

Adds a database to the associated Cosmos DB account resource.

## Definition

```typescript
interface AzureCosmosDBResource {
  // ... omitted for brevity
  addCosmosDatabase(
      name: string,
      databaseName?: string): AzureCosmosDBDatabaseResource;
}
```

## Signature

```typescript
addCosmosDatabase(
    name: string,
    databaseName?: string): AzureCosmosDBDatabaseResource
```

## Parameters

- `name` (`string`)
- `databaseName` (`string`) `optional`

## Returns

[AzureCosmosDBDatabaseResource](/reference/api/typescript/aspire.hosting.azure.cosmosdb/azurecosmosdbdatabaseresource.md) `builder`

## Defined on

- [AzureCosmosDBResource](/reference/api/typescript/aspire.hosting.azure.cosmosdb/azurecosmosdbresource.md) -- `handle`