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

# TrueFoundry

> Configure the TrueFoundry AI Gateway to export traces to Arize AX

[TrueFoundry](https://www.truefoundry.com/ai-gateway) is an enterprise AI gateway that fronts 1000+ models across 40+ providers behind a single OpenAI-compatible endpoint. The gateway is OpenTelemetry-native: with a one-time configuration in the TrueFoundry dashboard, **every** request that flows through the gateway is exported to Arize AX as a trace — no application code or instrumentation required.

<Note>
  This page configures the gateway to export traces for all of its traffic. To instead instrument your **own application's** calls to the gateway from Python, see the [TrueFoundry LLM provider integration](/ax/integrations/llm-providers/truefoundry/truefoundry-tracing).
</Note>

## Launch Arize AX

To get started, sign up for a [free Arize AX account](https://arize.com/sign-up/). Then, from **Settings → Service Keys**, create a new API key with the **Member** role and copy your:

* **API Key** (format `ak-...`)
* **Space ID** (format `U3BhY2U6...`)

## Configure trace export in TrueFoundry

In the TrueFoundry dashboard, navigate to **AI Gateway → Controls → Settings → OTEL Config**, then configure the OTLP exporter to point at Arize AX:

1. Set **Config Type** to `gRPC`.
2. Set the **Traces Endpoint** to `otlp.arize.com:443`.
3. Add two gRPC metadata **headers**:
   * `api_key` — your Arize API Key
   * `space_id` — your Arize Space ID
4. (Optional) Add resource attributes such as `model_id` to enrich your traces with identifying metadata.
5. (Optional) Enable **Exclude Request Data** to omit request and response bodies if you don't want prompt content sent to Arize.
6. Click **Save** to activate automatic trace export.

<Frame caption="The TrueFoundry AI Gateway OTEL Config pointed at Arize AX">
  ![The TrueFoundry OTEL configuration screen](https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/ai-integration-providers-truefoundry-otel-config.png)
</Frame>

## Observe

Once configured, every request through the gateway is exported to Arize AX. In your Arize AX space, open the project for the **`tfy-llm-gateway`** service to see traces appear within \~30 seconds of activity. Each trace includes the model, prompt, response, token usage, and latency for the gateway request.

## Resources

<CardGroup>
  <Card icon="book-open" href="https://www.truefoundry.com/docs/ai-gateway/arize" title="TrueFoundry Arize Integration Docs" horizontal />

  <Card icon="book" href="https://www.truefoundry.com/docs/ai-gateway/intro-to-llm-gateway" title="TrueFoundry AI Gateway Documentation" horizontal />
</CardGroup>