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

# Hugging Face Transformers

> Connect your Hugging Face Transformers application to Latitude for observability.

## Overview

This guide shows you how to integrate **Latitude Telemetry** into an application that runs models locally with **Hugging Face Transformers**.

<Check>
  You'll keep calling Transformers exactly as you do today. Telemetry simply
  observes and enriches those calls.
</Check>

<Note>
  Auto-instrumentation for Transformers is available in the **Python** SDK. For other
  languages, send traces via the [OpenTelemetry exporter](/telemetry/otel-exporter).
</Note>

***

## Requirements

* A **Latitude account** and **API key**
* A **Latitude project slug**
* A project that uses the **Transformers** library (`transformers`)
* A **Hugging Face token** for gated models (set as `HF_TOKEN`)

***

## Steps

<Steps>
  <Step title="Install">
    <CodeGroup>
      ```bash pip theme={"theme":{"light":"github-light","dark":"github-dark"}}
      pip install latitude-telemetry transformers torch
      ```

      ```bash uv theme={"theme":{"light":"github-light","dark":"github-dark"}}
      uv add latitude-telemetry transformers torch
      ```

      ```bash poetry theme={"theme":{"light":"github-light","dark":"github-dark"}}
      poetry add latitude-telemetry transformers torch
      ```
    </CodeGroup>
  </Step>

  <Step title="Initialize and use">
    ```python theme={"theme":{"light":"github-light","dark":"github-dark"}}
    import transformers
    from transformers import pipeline

    from latitude_telemetry import Latitude, capture

    latitude = Latitude(
        api_key="your-api-key",
        project="your-project-slug",
        instrumentations={"transformers": transformers},
    )

    def generate_reply():
        generator = pipeline("text-generation", model="gpt2", max_new_tokens=50)
        result = generator("Hello:")
        return result[0]["generated_text"]

    capture("generate-reply", generate_reply)

    latitude.shutdown()
    ```
  </Step>
</Steps>

***

## Seeing Your Traces

Once connected, traces appear automatically in Latitude:

1. Open your **project** in the Latitude dashboard
2. Each execution shows input/output messages, model, token usage, latency, and errors