Bedrock AgentCore

Call Bedrock AgentCore in the OpenAI Request/Response format.

Property	Details
Description	Amazon Bedrock AgentCore provides direct access to hosted agent runtimes for executing agentic workflows with foundation models.
Provider Route on LiteLLM	bedrock/agentcore/{AGENT_RUNTIME_ARN}
Provider Doc	AWS Bedrock AgentCore ↗

Quick Start

Model Format to LiteLLM

To call a bedrock agent runtime through LiteLLM, use the following model format.

Here the model=bedrock/agentcore/ tells LiteLLM to call the bedrock InvokeAgentRuntime API.

Model Format to LiteLLM

bedrock/agentcore/{AGENT_RUNTIME_ARN}

Example:

• bedrock/agentcore/arn:aws:bedrock-agentcore:us-west-2:123456789012:runtime/my-agent-runtime

You can find the Agent Runtime ARN in your AWS Bedrock console under AgentCore.

LiteLLM Python SDK

Basic AgentCore Completion

import litellm

# Make a completion request to your AgentCore runtime
response = litellm.completion(
    model="bedrock/agentcore/arn:aws:bedrock-agentcore:us-west-2:123456789012:runtime/my-agent-runtime",
    messages=[
        {
            "role": "user", 
            "content": "Explain machine learning in simple terms"
        }
    ],
)

print(response.choices[0].message.content)
print(f"Usage: {response.usage}")

Streaming AgentCore Responses

import litellm

# Stream responses from your AgentCore runtime
response = litellm.completion(
    model="bedrock/agentcore/arn:aws:bedrock-agentcore:us-west-2:123456789012:runtime/my-agent-runtime",
    messages=[
        {
            "role": "user",
            "content": "What are the key principles of software architecture?"
        }
    ],
    stream=True,
)

for chunk in response:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="")

LiteLLM Proxy

1. Configure your model in config.yaml

config.yaml

LiteLLM Proxy Configuration

model_list:
  - model_name: agentcore-runtime-1
    litellm_params:
      model: bedrock/agentcore/arn:aws:bedrock-agentcore:us-west-2:123456789012:runtime/my-agent-runtime
      aws_access_key_id: os.environ/AWS_ACCESS_KEY_ID
      aws_secret_access_key: os.environ/AWS_SECRET_ACCESS_KEY
      aws_region_name: us-west-2

  - model_name: agentcore-runtime-2
    litellm_params:
      model: bedrock/agentcore/arn:aws:bedrock-agentcore:us-east-1:987654321098:runtime/production-runtime
      aws_access_key_id: os.environ/AWS_ACCESS_KEY_ID
      aws_secret_access_key: os.environ/AWS_SECRET_ACCESS_KEY
      aws_region_name: us-east-1

2. Start the LiteLLM Proxy

Start LiteLLM Proxy

litellm --config config.yaml

3. Make requests to your AgentCore runtimes

Curl

Basic AgentCore Request

curl http://localhost:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $LITELLM_API_KEY" \
  -d '{
    "model": "agentcore-runtime-1",
    "messages": [
      {
        "role": "user", 
        "content": "Summarize the main benefits of cloud computing"
      }
    ]
  }'

Streaming AgentCore Request

curl http://localhost:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $LITELLM_API_KEY" \
  -d '{
    "model": "agentcore-runtime-2",
    "messages": [
      {
        "role": "user",
        "content": "Explain the differences between SQL and NoSQL databases"
      }
    ],
    "stream": true
  }'

OpenAI Python SDK

Using OpenAI SDK with LiteLLM Proxy

from openai import OpenAI

# Initialize client with your LiteLLM proxy URL
client = OpenAI(
    base_url="http://localhost:4000",
    api_key="your-litellm-api-key"
)

# Make a completion request to your AgentCore runtime
response = client.chat.completions.create(
    model="agentcore-runtime-1",
    messages=[
      {
        "role": "user",
        "content": "What are best practices for API design?"
      }
    ]
)

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

Streaming with OpenAI SDK

from openai import OpenAI

client = OpenAI(
    base_url="http://localhost:4000", 
    api_key="your-litellm-api-key"
)

# Stream AgentCore responses
stream = client.chat.completions.create(
    model="agentcore-runtime-2",
    messages=[
      {
        "role": "user",
        "content": "Describe the microservices architecture pattern"
      }
    ],
    stream=True
)

for chunk in stream:
    if chunk.choices[0].delta.content is not None:
        print(chunk.choices[0].delta.content, end="")

Provider-specific Parameters

AgentCore supports additional parameters that can be passed to customize the runtime invocation.

SDK

Using AgentCore-specific parameters

from litellm import completion

response = litellm.completion(
    model="bedrock/agentcore/arn:aws:bedrock-agentcore:us-west-2:123456789012:runtime/my-agent-runtime",
    messages=[
        {
            "role": "user",
            "content": "Analyze this data and provide insights",
        }
    ],
    qualifier="production",  # PROVIDER-SPECIFIC: Runtime qualifier/version
    runtimeSessionId="session-abc-123",  # PROVIDER-SPECIFIC: Custom session ID
)

Proxy

LiteLLM Proxy Configuration with Parameters

model_list:
  - model_name: agentcore-runtime-prod
    litellm_params:
      model: bedrock/agentcore/arn:aws:bedrock-agentcore:us-west-2:123456789012:runtime/my-agent-runtime
      aws_access_key_id: os.environ/AWS_ACCESS_KEY_ID
      aws_secret_access_key: os.environ/AWS_SECRET_ACCESS_KEY
      aws_region_name: us-west-2
      qualifier: production

Available Parameters

Parameter	Type	Description
qualifier	string	Optional runtime qualifier/version to invoke a specific version of the agent runtime
runtimeSessionId	string	Optional custom session ID (must be 33+ characters). If not provided, LiteLLM generates one automatically

Further Reading

• AWS Bedrock AgentCore Documentation
• LiteLLM Authentication to Bedrock