# Data residency
<a name="data-residency"></a>

Claude Platform on AWS supports the following inference geographies:
+  **US:** Inference stays within US data centers. A 1.1x pricing multiplier applies.
+  **Global:** Inference may route to any Anthropic-operated data center worldwide. Standard pricing applies.

Set the inference geography per request with the `inference_geo` parameter:

**Note**  
The `inference_geo` parameter is supported on Claude Opus 4.6, Claude Sonnet 4.6, and later models. Requests with `inference_geo` on Claude Opus 4.5, Claude Sonnet 4.5, or Claude Haiku 4.5 return a 400 error. See [Data residency](https://platform.claude.com/docs/en/manage-claude/data-residency) for model availability details.

 **Shell** 

```
curl "https://aws-external-anthropic.us-west-2.api.aws/v1/messages" \
  --aws-sigv4 "aws:amz:us-west-2:aws-external-anthropic" \
  --user "$AWS_ACCESS_KEY_ID:$AWS_SECRET_ACCESS_KEY" \
  -H "x-amz-security-token: $AWS_SESSION_TOKEN" \
  -H "content-type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -H "anthropic-workspace-id: $ANTHROPIC_AWS_WORKSPACE_ID" \
  -d '{
    "model": "claude-sonnet-4-6",
    "max_tokens": 1024,
    "inference_geo": "us",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'
```

 **Python** 

```
from anthropic import AnthropicAWS

client = AnthropicAWS(aws_region="us-west-2")
message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    inference_geo="us",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(message)
```

 **TypeScript** 

```
import AnthropicAws from "@anthropic-ai/aws-sdk";
const client = new AnthropicAws({ awsRegion: "us-west-2" });
const message = await client.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 1024,
  inference_geo: "us",
  messages: [{ role: "user", content: "Hello!" }]
});
console.log(message);
```

 **C\#** 

```
using Anthropic;
using Anthropic.Aws;

var client = new AnthropicAwsClient(new() { AwsRegion = "us-west-2" });

var message = await client.Messages.Create(new()
{
    Model = "claude-sonnet-4-6",
    MaxTokens = 1024,
    InferenceGeo = "us",
    Messages = [new() { Role = "user", Content = "Hello!" }]
});

Console.WriteLine(message);
```

 **Go** 

```
client, err := anthropicaws.NewClient(context.Background(), anthropicaws.ClientConfig{})
if err != nil {
    panic(err)
}

message, err := client.Messages.New(context.Background(), anthropic.MessageNewParams{
    Model:        anthropic.ModelClaudeSonnet4_6,
    MaxTokens:    1024,
    InferenceGeo: anthropic.String("us"),
    Messages: []anthropic.MessageParam{
        anthropic.NewUserMessage(anthropic.NewTextBlock("Hello!")),
    },
})
if err != nil {
    panic(err)
}

fmt.Println(message)
```

 **Java** 

```
import com.anthropic.aws.backends.AwsBackend;
import com.anthropic.client.AnthropicClient;
import com.anthropic.client.okhttp.AnthropicOkHttpClient;
import com.anthropic.models.messages.Message;
import com.anthropic.models.messages.MessageCreateParams;
import com.anthropic.models.messages.Model;
import software.amazon.awssdk.regions.Region;

AnthropicClient client = AnthropicOkHttpClient.builder()
    .backend(AwsBackend.builder().region(Region.of("us-west-2")).build())
    .build();

Message message = client.messages().create(
    MessageCreateParams.builder()
        .model(Model.CLAUDE_SONNET_4_6)
        .maxTokens(1024)
        .inferenceGeo("us")
        .addUserMessage("Hello!")
        .build()
);

IO.println(message);
```

 **PHP** 

```
use Anthropic\Aws\Client;

$client = new Client(awsRegion: 'us-west-2');

$message = $client->messages->create(
    model: 'claude-sonnet-4-6',
    maxTokens: 1024,
    inferenceGeo: 'us',
    messages: [['role' => 'user', 'content' => 'Hello!']],
);

echo $message;
```

 **Ruby** 

```
require "anthropic"

client = Anthropic::AWSClient.new(aws_region: "us-west-2")

message = client.messages.create(
  model: "claude-sonnet-4-6",
  max_tokens: 1024,
  inference_geo: "us",
  messages: [{ role: "user", content: "Hello!" }]
)

puts message
```

If you omit `inference_geo`, the request defaults to `global`.

Workspace-level inference geography controls (`allowed_inference_geos` and `default_inference_geo`) are not available on Claude Platform on AWS. Set `inference_geo` on each request instead.