> ## Documentation Index
> Fetch the complete documentation index at: https://arize-ax.mintlify.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Agno

> Trace Agno agents with OpenInference and send spans to Arize AX for LLM observability.

[Agno](https://github.com/agno-agi/agno) is a Python agent framework for building lean LLM applications with model abstraction, tool use, memory, and reasoning. Arize AX captures every Agno agent run — the agent's reasoning steps, tool invocations, and LLM calls — via the [`openinference-instrumentation-agno`](https://github.com/Arize-ai/openinference/tree/main/python/instrumentation/openinference-instrumentation-agno) package.

## Prerequisites

* Python 3.10+
* An Arize AX account ([sign up](https://arize.com/sign-up/))
* An `OPENAI_API_KEY` from the [OpenAI Platform](https://platform.openai.com/api-keys)

## Launch Arize AX

1. Sign in to your [Arize AX account](https://app.arize.com/).
2. From **Space Settings**, copy your **Space ID** and **API Key**. You will set them as `ARIZE_SPACE_ID` and `ARIZE_API_KEY` below.

## Install

```bash theme={null}
pip install arize-otel openinference-instrumentation-agno agno openai
```

## Configure credentials

```bash theme={null}
export ARIZE_SPACE_ID="<your-space-id>"
export ARIZE_API_KEY="<your-api-key>"
export ARIZE_PROJECT_NAME="agno-tracing-example"
export OPENAI_API_KEY="<your-openai-api-key>"
```

## Setup tracing

```python theme={null}
# instrumentation.py
import os

from arize.otel import register
from openinference.instrumentation.agno import AgnoInstrumentor

tracer_provider = register(
    space_id=os.environ["ARIZE_SPACE_ID"],
    api_key=os.environ["ARIZE_API_KEY"],
    project_name=os.environ["ARIZE_PROJECT_NAME"],
)

AgnoInstrumentor().instrument(tracer_provider=tracer_provider)
print("Arize AX tracing initialized for Agno.")
```

## Run Agno

```python theme={null}
# example.py

# Importing instrumentation first ensures tracing is set up
# before `agno` is imported.
from instrumentation import tracer_provider

from agno.agent import Agent
from agno.models.openai import OpenAIChat

# OpenAIChat reads OPENAI_API_KEY from the environment.
agent = Agent(model=OpenAIChat(id="gpt-5"))

response = agent.run("Why is the ocean salty? Answer in two sentences.")
print(response.content)
```

### Expected output

```text wrap theme={null}
Arize AX tracing initialized for Agno.
The ocean is salty because rivers continuously dissolve mineral salts from rocks and soil and carry them to the sea, where they accumulate over millions of years. Water leaves the ocean through evaporation but the salts remain, steadily concentrating until reaching today's roughly 3.5% salinity.
```

## Verify in Arize AX

1. Open your Arize AX space and select project **`agno-tracing-example`**.
2. You should see a new trace within \~30 seconds containing an `Agent.run` parent span wrapping an `OpenAIChat` LLM child span with the prompt, response, and token usage attached.
3. If no traces appear, see [Troubleshooting](#troubleshooting).

## Troubleshooting

* **No traces in Arize AX.** Confirm `ARIZE_SPACE_ID` and `ARIZE_API_KEY` are set in the same shell that runs `example.py`. Enable OpenTelemetry debug logs with `export OTEL_LOG_LEVEL=debug` and re-run.
* **Agno spans missing but other spans present.** `AgnoInstrumentor().instrument(...)` must run before any `from agno import ...`. Make sure `instrumentation.py` is the first import in your entry point.
* **`401` from OpenAI.** Verify `OPENAI_API_KEY` is set and has access to `gpt-5`. Swap for a model your key can call.
* **Other LLM providers.** Agno supports many models — `from agno.models.anthropic import Claude`, `from agno.models.groq import Groq`, etc. The same `AgnoInstrumentor` covers them.

## Resources

<CardGroup>
  <Card icon="book-open" href="https://docs.agno.com/" title="Agno Documentation" horizontal />

  <Card icon="terminal" href="https://github.com/Arize-ai/openinference/tree/main/python/instrumentation/openinference-instrumentation-agno" title="OpenInference Agno Instrumentor" horizontal />

  <Card icon="github" href="https://github.com/agno-agi/agno" title="Agno GitHub" horizontal />
</CardGroup>