> For the complete documentation index, see [llms.txt](https://docs.trycaliber.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trycaliber.ai/connect-your-providers/ai-observability.md).

# AI observability

Connect Langfuse and LangSmith for live-agent traces and runs.

Langfuse and LangSmith share the same shape: project API keys that pull about **30 days** of agent-related runs into Caliber’s agents surfaces (when those integrations are connected).

{% tabs %}
{% tab title="Langfuse" %}
**Auth:** Host URL + public key (`pk-lf-…`) and secret key (`sk-lf-…`)\
**Who:** Langfuse project owner

1. Open project **Settings → API Keys** in Langfuse.
2. In Caliber, open **Settings → Integrations → Langfuse**.
3. Paste host + key pair.

**What Caliber reads:** Traces for live-agent runs, cost, and latency.
{% endtab %}

{% tab title="LangSmith" %}
**Auth:** Service or personal API key (`lsv2_pt_…`) + base URL (US/EU)\
**Who:** LangSmith project / workspace owner

1. Create an API key in LangSmith.
2. In Caliber, open **Settings → Integrations → LangSmith**.
3. Paste the key and select workspaces as prompted.

**What Caliber reads:** Root runs across configured projects for the live-agents feed.
{% endtab %}
{% endtabs %}


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