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

# Observability Adapter • AI Agent SDK

> ObservabilityAdapter: Protocol for observability adapters.

# ObservabilityAdapter

> Defined in the [**obs**](https://praison.ai/docs/sdk/reference/praisonaiagents/modules/obs.md) module.

AI Agent

Protocol for observability adapters.

## Methods

> [card] [on\_trace\_start()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-on_trace_start.md)
>
> Called when a trace starts.

> [card] [on\_trace\_end()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-on_trace_end.md)
>
> Called when a trace ends.

> [card] [on\_span\_start()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-on_span_start.md)
>
> Called when a span starts.

> [card] [on\_span\_end()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-on_span_end.md)
>
> Called when a span ends.

> [card] [on\_llm\_call()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-on_llm_call.md)
>
> Called when an LLM call is made.

> [card] [on\_tool\_call()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-on_tool_call.md)
>
> Called when a tool is invoked.

> [card] [flush()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-flush.md)
>
> Flush any pending data.

> [card] [close()](https://praison.ai/docs/sdk/reference/praisonaiagents/functions/ObservabilityAdapter-close.md)
>
> Close the adapter and release resources.

## Source

> [card] [View on GitHub](https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/obs/__init__.py#L56)
>
> `praisonaiagents/obs/__init__.py` at line 56


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