lmux-aws-bedrock 0.4.4

AWS Bedrock provider for lmux

lmux-aws-bedrock

AWS Bedrock provider for lmux. Uses boto3, aiobotocore, and the Converse API.

Supports chat completions, streaming, and embeddings.

Part of the lmux ecosystem: standardized interface, cost tracking on every response, and registry-based routing across providers.

Optional Extras

• lmux-aws-bedrock[async]: async support via aiobotocore

Auth

Uses boto3's default credential chain (env vars, AWS config, instance metadata). No extra setup needed if your AWS credentials are already configured.

from lmux_aws_bedrock import BedrockProvider

provider = BedrockProvider()

# Or specify a region
provider = BedrockProvider(region="us-east-1")

For explicit session configuration:

from lmux_aws_bedrock import BedrockSessionAuthProvider

provider = BedrockProvider(auth=BedrockSessionAuthProvider(profile_name="my-profile"))

Usage

Chat

from lmux import UserMessage

response = provider.chat("anthropic.claude-sonnet-4-20250514-v1:0", [UserMessage(content="Hello")])
print(response.content)
print(response.cost)

Streaming

for chunk in provider.chat_stream("anthropic.claude-sonnet-4-20250514-v1:0", [UserMessage(content="Hello")]):
    if chunk.delta:
        print(chunk.delta, end="")

Embeddings

response = provider.embed("amazon.titan-embed-text-v2:0", "Hello")
print(response.embeddings)

Async

Requires the [async] extra. All methods have async variants: achat, achat_stream, aembed.

Bedrock also supports lmux response_format, mapped to Converse outputConfig.textFormat.

Registry

Use with the lmux registry to route across multiple providers:

from lmux import Registry

registry = Registry()
registry.register("bedrock", provider)
response = registry.chat("bedrock/anthropic.claude-sonnet-4-20250514-v1:0", messages)

Provider Params

from lmux_aws_bedrock import BedrockParams, GuardrailConfig

response = provider.chat(
    "anthropic.claude-sonnet-4-20250514-v1:0",
    messages,
    provider_params=BedrockParams(
        guardrail_config=GuardrailConfig(
            guardrail_identifier="my-guardrail",
            guardrail_version="1",
        ),
    ),
)

Parameter	Type	Description
guardrail_config	GuardrailConfig	Bedrock guardrail to apply
additional_model_request_fields	dict	Extra fields passed to the model
additional_model_response_field_paths	list[str]	Extra response fields to return

Constructor Options

BedrockProvider(
    auth=...,          # AuthProvider, default: BedrockEnvAuthProvider()
    region=...,        # AWS region
    endpoint_url=...,  # Custom endpoint URL
)