Execution Mode

Overview

Execution Mode decides where test cases are executed for an endpoint.

Use this selection before running tests so behavior matches your environment and workflow.

Shift-Left Engine

• Runs tests on the server.
• Best for CI/CD pipelines and scheduled runs.
• Status is typically shown as Always Available.

Choose this mode when you want centralized execution and automation-ready behavior.

Shift-Left Agent

• Runs tests locally on your machine.
• Best for development workflows and private/internal APIs.
• Status can appear as Not Running when the local agent process is not active.

Choose this mode when local network access or developer-side execution is required.

If Shift-Left Agent is not available

When the UI shows Shift-Left Agent Not Available, use this flow:

1. Download Shift-Left Agent.
2. Install Shift-Left Agent.
3. Start Shift-Left Agent.

After startup, refresh status in Studio and select Agent mode again.

Start and stop Agent

• Start Agent: launch the local agent service/app so Studio can execute local tests.
• Stop Agent: stop the local service when local execution is no longer needed.

If status remains unavailable after start, verify installation health and local connectivity.

Related articles

• Generate endpoint test cases
• Test case
• Run tests and review results
• Test execution