Logfire Via OpenInference

Streams a YFinance stock agent's spans to Logfire over OTLP HTTP using the OpenInference Agno instrumentor.

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

logfire_via_openinference.py
"""
Logfire Via OpenInference
=========================

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

import asyncio
import os

from agno.agent import Agent
from agno.models.openai import OpenAIChat
from agno.tools.yfinance import YFinanceTools
from openinference.instrumentation.agno import AgnoInstrumentor
from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import SimpleSpanProcessor

# ---------------------------------------------------------------------------
# Setup
# ---------------------------------------------------------------------------
LOGFIRE_WRITE_TOKEN = os.getenv("LOGFIRE_WRITE_TOKEN")

# os.environ["OTEL_EXPORTER_OTLP_ENDPOINT"] = (
#     "https://logfire-us.pydantic.dev"  # US data region
# )
os.environ["OTEL_EXPORTER_OTLP_ENDPOINT"] = (
    "https://logfire-eu.pydantic.dev"  # EU data region
)
# os.environ["OTEL_EXPORTER_OTLP_ENDPOINT"] = "http://localhost:4318"  # Local deployment

os.environ["OTEL_EXPORTER_OTLP_HEADERS"] = f"Authorization={LOGFIRE_WRITE_TOKEN}"

tracer_provider = TracerProvider()
tracer_provider.add_span_processor(SimpleSpanProcessor(OTLPSpanExporter()))

# Start instrumenting agno
AgnoInstrumentor().instrument(tracer_provider=tracer_provider)


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


# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------
async def main() -> None:
    await agent.aprint_response(
        "What is the current price of Tesla? Then find the current price of NVIDIA",
        stream=True,
    )


if __name__ == "__main__":
    asyncio.run(main())

Run the Example

Set up your virtual environment

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

Install dependencies

uv pip install -U agno openai openinference-instrumentation-agno opentelemetry-exporter-otlp opentelemetry-sdk yfinance

Export environment variables

export LOGFIRE_WRITE_TOKEN="your_logfire_write_token_here"
export OPENAI_API_KEY="your_openai_api_key_here"

Choose the Logfire region

Set OTEL_EXPORTER_OTLP_ENDPOINT in the code to the endpoint for your Logfire project's US or EU region. The source enables the EU endpoint by default.

Run the example

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

python logfire_via_openinference.py

Full source: cookbook/observability/logfire_via_openinference.py