Arize Phoenix Via OpenInference

Trace a structured-output stock agent to Phoenix Cloud via phoenix.otel register with auto-instrumentation.

Demonstrates instrumenting an Agno agent with OpenInference and sending traces to Phoenix.

arize_phoenix_via_openinference.py
"""
Arize Phoenix Via OpenInference
===============================

Demonstrates instrumenting an Agno agent with OpenInference and sending traces to Phoenix.
"""

import asyncio
import os

from agno.agent import Agent
from agno.db.in_memory import InMemoryDb
from agno.models.openai import OpenAIChat
from agno.tools.yfinance import YFinanceTools
from phoenix.otel import register
from pydantic import BaseModel

# ---------------------------------------------------------------------------
# Setup
# ---------------------------------------------------------------------------
os.environ["PHOENIX_API_KEY"] = os.getenv("PHOENIX_API_KEY")
os.environ["PHOENIX_COLLECTOR_ENDPOINT"] = (
    "https://app.phoenix.arize.com/"  # Add the suffix for your organization
)

# Configure the Phoenix tracer
tracer_provider = register(
    project_name="default",  # Default is 'default'
    auto_instrument=True,  # Automatically use the installed OpenInference instrumentation
)


class StockPrice(BaseModel):
    stock_price: float


# ---------------------------------------------------------------------------
# Create Agent
# ---------------------------------------------------------------------------
agent = Agent(
    name="Stock Price Agent",
    model=OpenAIChat(id="gpt-5.2"),
    tools=[YFinanceTools()],
    db=InMemoryDb(),
    instructions="You are a stock price agent. Answer questions in the style of a stock analyst.",
    session_id="test_123",
    output_schema=StockPrice,
)


# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------
if __name__ == "__main__":
    asyncio.run(
        agent.aprint_response("What is the current price of Tesla?", stream=True)
    )

Configure your Phoenix instance

Replace the source's generic PHOENIX_COLLECTOR_ENDPOINT value with the collector endpoint from your Phoenix instance's Settings page before calling register(). Exporting a different value in the shell is insufficient because the source overwrites it. See Phoenix setup.

Run the Example

Set up your virtual environment

uv venv --python 3.12
source .venv/bin/activate

Install dependencies

uv pip install -U agno arize-phoenix openai openinference-instrumentation-agno yfinance

Export your API keys

export OPENAI_API_KEY="your_openai_api_key_here"
export PHOENIX_API_KEY="your_phoenix_api_key_here"

Run the example

Save the code above as arize_phoenix_via_openinference.py, then run:

python arize_phoenix_via_openinference.py

Full source: cookbook/observability/arize_phoenix_via_openinference.py