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

# Amazon Bedrock Mantle

> OpenAI-compatible AWS Bedrock inference via the Mantle engine

[Amazon Bedrock Mantle](https://docs.aws.amazon.com/bedrock/latest/userguide/bedrock-mantle.html) is AWS's OpenAI-compatible inference engine for Bedrock models. The `bedrock-mantle` provider in Portkey routes requests to `bedrock-mantle.{region}.api.aws`, giving you access to Bedrock models via:

* `/v1/chat/completions` (OpenAI Chat Completions)
* `/v1/responses` (OpenAI Responses)
* `/v1/messages` (Anthropic-native, via `bedrock-mantle.{region}.api.aws/anthropic/v1`)

<Note>
  Use `bedrock-mantle` when you want OpenAI-compatible access to Bedrock. For the classic Bedrock runtime (Converse / InvokeModel), use the [`bedrock`](/integrations/llms/bedrock/aws-bedrock) provider.
</Note>

## Quick Start

<CodeGroup>
  ```python Python theme={"system"}
  from portkey_ai import Portkey

  portkey = Portkey(api_key="PORTKEY_API_KEY")

  response = portkey.chat.completions.create(
      model="@bedrock-mantle-provider/anthropic.claude-sonnet-4-5-20250929-v1:0",
      messages=[{"role": "user", "content": "Say this is a test"}]
  )

  print(response.choices[0].message.content)
  ```

  ```javascript NodeJS theme={"system"}
  import Portkey from 'portkey-ai';

  const portkey = new Portkey({ apiKey: "PORTKEY_API_KEY" });

  const response = await portkey.chat.completions.create({
      model: "@bedrock-mantle-provider/anthropic.claude-sonnet-4-5-20250929-v1:0",
      messages: [{ role: "user", content: "Say this is a test" }]
  });

  console.log(response.choices[0].message.content);
  ```

  ```sh cURL theme={"system"}
  curl https://api.portkey.ai/v1/chat/completions \
    -H "Content-Type: application/json" \
    -H "x-portkey-api-key: $PORTKEY_API_KEY" \
    -H "x-portkey-provider: @bedrock-mantle-provider" \
    -d '{
      "model": "anthropic.claude-sonnet-4-5-20250929-v1:0",
      "messages": [{"role": "user", "content": "Say this is a test"}]
    }'
  ```
</CodeGroup>

## Add Provider in Model Catalog

Configure a new provider with **Bedrock Mantle** as the provider type. Choose one of the supported auth modes:

| Auth Mode                     | Required Fields                                                    |
| ----------------------------- | ------------------------------------------------------------------ |
| **API Key**                   | `apiKey` (Amazon Bedrock API key / bearer token)                   |
| **Assumed Role**              | `awsRoleArn`, `awsExternalId`, `awsRegion`                         |
| **Service Role** (EKS / IRSA) | `awsRegion` (credentials are resolved from the pod's service role) |

`awsRegion` determines which regional endpoint is used (e.g., `us-east-1` → `bedrock-mantle.us-east-1.api.aws`).

## Anthropic Messages API

Requests to `/v1/messages` or chat completions with `anthropic.*` models are routed to the Mantle Anthropic base path (`/anthropic/v1`). Pass the Anthropic version via the `anthropic-version` header or `anthropic_version` in the request body (defaults to `2023-06-01`).

## Related Resources

<Card title="Amazon Bedrock Mantle Documentation" href="https://docs.aws.amazon.com/bedrock/latest/userguide/bedrock-mantle.html">
  Official AWS documentation for Bedrock Mantle endpoints, supported regions, and models.
</Card>