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Instrument LLM calls to AWS Bedrock via the boto3 client using OpenInference.
boto3 provides Python bindings to AWS services, including Bedrock, which provides access to a number of foundation models. Calls to these models can be instrumented using OpenInference, enabling OpenTelemetry-compliant observability of applications built using these models. Traces collected using OpenInference can be viewed in Phoenix.


OpenInference Traces collect telemetry data about the execution of your LLM application. Consider using this instrumentation to understand how a Bedrock-managed models are being called inside a complex system and to troubleshoot issues such as extraction and response synthesis.
To get started instrumenting Bedrock calls via boto3, we need to install three components: Phoenix, which acts as a trace collector, the OpenInference instrumentation for AWS Bedrock, and an OpenTelemetry exporter used to send these traces to Phoenix.
pip install arize-phoenix
pip install openinference-instrumentation-bedrock
pip install opentelemetry-exporter-otlp
Launch a Phoenix server to collect OpenInference traces.
import phoenix as px
session = px.launch_app()
After starting a Phoenix server, instrument boto3 prior to initializing a bedrock-runtime client. All clients created after instrumentation will send traces on all calls to invoke_model.
import boto3
from openinference.instrumentation.bedrock import BedrockInstrumentor
from opentelemetry import trace as trace_api
from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
from opentelemetry.sdk import trace as trace_sdk
from opentelemetry.sdk.resources import Resource
from opentelemetry.sdk.trace.export import ConsoleSpanExporter, SimpleSpanProcessor
resource = Resource(attributes={})
tracer_provider = trace_sdk.TracerProvider(resource=resource)
span_console_exporter = ConsoleSpanExporter()
# point the SpanExporter to the Phoenix server URL
span_otlp_exporter = OTLPSpanExporter(endpoint="")
session = boto3.session.Session()
client = session.client("bedrock-runtime")
# All calls to invoke_model are instrumented
prompt = (
b'{"prompt": "Human: Hello there, how are you? Assistant:", "max_tokens_to_sample": 1024}'
response = client.invoke_model(modelId="anthropic.claude-v2", body=prompt)
response_body = json.loads(response.get("body").read())