> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/resilience-testing/chaos-engineering/use-chaos-engineering/probes/experiment-level-probes.md).

# Experiment-Level Probes

{% hint style="info" %}
**NEW CHAOS STUDIO FEATURE**

**Experiment-Level Probes** are part of the enhanced **New Chaos Studio** experience. If you're an existing customer and want access to new features, contact your Harness support representative. For more details, see [New Chaos Studio Features](/resilience-testing/chaos-engineering/readme.md#new-chaos-studio-features).
{% endhint %}

### What are Experiment-Level Probes? <a href="#what-are-experiment-level-probes" id="what-are-experiment-level-probes"></a>

Experiment-level probes are resilience validation checks that operate across the entire chaos experiment lifecycle, rather than being scoped to individual faults. These probes provide:

* **Global Validation**: Monitor system health across all faults in an experiment
* **End-to-End Assessment**: Validate overall system behavior from start to finish
* **Cross-Fault Correlation**: Understand how multiple faults interact and affect system resilience
* **Comprehensive Monitoring**: Track metrics and health indicators throughout the experiment

Unlike fault-specific probes that validate individual chaos injections, experiment-level probes assess the cumulative impact of all chaos activities within an experiment.

### Getting Started <a href="#getting-started" id="getting-started"></a>

Follow these steps to add experiment-level probes to your chaos experiments:

#### Step 1: Create or Open an Experiment <a href="#step-1-create-or-open-an-experiment" id="step-1-create-or-open-an-experiment"></a>

1. Navigate to **Chaos Experiments** in your Harness project
2. Either create a new experiment or open an existing one

#### Step 2: Add Experiment-Level Probes <a href="#step-2-add-experiment-level-probes" id="step-2-add-experiment-level-probes"></a>

1. In the experiment builder, click on the '+' icon, then click **Add a Probe**.

   ![add probe](/files/cvs0KZS5WbxgXAxskUjy)
2. Choose the probe you want to add to the experiment.

   ![choose probe](/files/9oIRuPPO9VIJZvrMzF8D)
3. Configure the probe properties and click **Apply Changes**.

   ![configure probe](/files/8YWhmzggaK5rF8Sfa9CT)

#### Step 3: Validate and Run <a href="#step-3-validate-and-run" id="step-3-validate-and-run"></a>

1. Save the experiment with the configured probe
2. **Run** the experiment to see probe results

### Next Steps <a href="#next-steps" id="next-steps"></a>

* [Learn about Probe Types and Modes](/resilience-testing/chaos-engineering/use-chaos-engineering/probes/types-and-modes.md)
* [Create and Run Chaos Experiments](/resilience-testing/chaos-engineering/chaos-experiments/create-experiments.md)
* [Explore Experiment Timeline View](/resilience-testing/chaos-engineering/chaos-experiments/timeline-view-experiments.md)