After the test has been started, and the real-time report is now available, you can copy and paste the Session ID into a document for later use (see below screenshot). This ID will be used as a parameter in the API to identify a specific session of your BlazeMeter test.

You can find the Session ID in the JMeter test:

• In your Test report under the 'Original Test Configuration' report:

• During the 'Launch/Booting' page when starting your Test report:
• In your Test report under the 'Logs' report. The Load Engines dropdown will include all the sessions for your test.