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

# Setup

> What it takes for an agent to show up on the Agents page - zero code by default, explicit identity when you want it

<Steps>
  <Step title="Instrument your application">
    The [OpenLIT SDK](/latest/openlit/quickstart-ai-observability) auto-instruments 90+ LLMs, agent frameworks, and vector databases with zero code changes. Any process emitting `gen_ai.*` spans under a given `service.name` shows up as its own row on the Applications tab - there's no separate agent registration step.
  </Step>

  <Step title="(Optional) Tag explicit agent identity and version">
    By default, OpenLIT infers agent identity from `service.name`. If you want explicit control - for example, multiple agents running in the same service - wrap the relevant code in `agent_context()` and `agent_version_context()`:

    ```python theme={null}
    import openlit

    with openlit.agent_context(name="support-agent"):
        with openlit.agent_version_context(version="v3"):
            completion = client.chat.completions.create(...)
    ```

    These stamp `gen_ai.agent.name` and `gen_ai.agent.version` on every span inside the block, and are what power per-agent grouping and version fingerprints when you don't want to rely on inferred grouping from `service.name` alone. See [Custom Attributes](/latest/sdk/features/custom-attributes#tag-spans-with-agent-identity) for the full API.
  </Step>

  <Step title="Check the Agents page">
    Once spans land, the agent appears automatically on the Applications tab - refresh the [Agents page](/latest/openlit/observability/agents/overview) after a request or two. No restart or manual sync is needed.
  </Step>
</Steps>

## Enabling or disabling observability for an agent

Once an agent is discovered, whether LLM Observability and Agent Observability are actively capturing data for it is controlled per-agent from its own [Configuration tab](/latest/openlit/observability/agents/configuration) - not from a setup step here.

***

<Card title="Configuration" href="/latest/openlit/observability/agents/configuration" icon="sliders">
  Toggle LLM / Agent Observability for an already-discovered agent
</Card>