OpenInference Anthropic Instrumentation

Python autoinstrumentation library for the Anthropic package

This package implements the following Anthropic clients:

  • Messages
  • AsyncMessages
  • BetaMessagesParse
  • AsyncBetaMessagesParse

These traces are fully OpenTelemetry compatible and can be sent to an OpenTelemetry collector for viewing, such as Arize Phoenix or Arize AX.

Compatibility

openinference-instrumentation-anthropic anthropic Python
>=2.0 >=1.0.0 >=3.10, <3.15
>=1.0.1, <2.0 >=0.84.0, <1.0 >=3.10, <3.15
1.0.0 >=0.84.0, <1.0 >=3.9, <3.15

Anthropic 1.0 removed the legacy Text Completions API. Instrumentor 2.0 therefore requires anthropic>=1.0.0 and instruments the Messages and Beta Messages APIs. See Anthropic's v1 migration guide for the upstream breaking changes.

Installation

pip install openinference-instrumentation-anthropic

Quickstart

Through your terminal, install required packages.

pip install openinference-instrumentation-anthropic anthropic arize-phoenix opentelemetry-sdk opentelemetry-exporter-otlp

You can start Phoenix with the following terminal command:

python -m phoenix.server.main serve

By default, Phoenix listens on http://localhost:6006. You can visit the app via a browser at the same address. (Phoenix does not send data over the internet. It only operates locally on your machine.)

Try the following code in a Python file.

  1. Set up AnthropicInstrumentor to trace your application and sends the traces to Phoenix.
  2. Then, set your Anthropic API key as an environment variable.
  3. Lastly, create a Anthropic client, make a request, then go see your results in Phoenix at http://localhost:6006!
import os
from anthropic import Anthropic
from openinference.instrumentation.anthropic import AnthropicInstrumentor
from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
from opentelemetry.sdk import trace as trace_sdk
from opentelemetry.sdk.trace.export import SimpleSpanProcessor

# Configure AnthropicInstrumentor with Phoenix endpoint
endpoint = "http://127.0.0.1:6006/v1/traces"
tracer_provider = trace_sdk.TracerProvider()
tracer_provider.add_span_processor(SimpleSpanProcessor(OTLPSpanExporter(endpoint)))

AnthropicInstrumentor().instrument(tracer_provider=tracer_provider)

os.environ["ANTHROPIC_API_KEY"] = "YOUR_KEY_HERE"

client = Anthropic()

response = client.messages.create(
    max_tokens=1024,
    messages=[
        {
            "role": "user",
            "content": "Tell me about the history of Iceland!",
        }
    ],
    model="claude-3-opus-20240229",
)
print(response)

Now, on the Phoenix UI on your browser, you should see the traces from your Anthropic application. Click on a trace, then the "Attributes" tab will provide you with in-depth information regarding execution!

More Info

Project links

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Credits

Author: OpenInference Authors

GitHub Statistics

Data verified by PyPI on Aug 25, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

Apache-2.0
View SPDX License List

Requires

Python <3.15, >=3.10

Provides Extra

instruments

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