n8n-docs/docs/code-examples/methods-variables-examples/execution.md

$execution

$execution.id

Contains the unique ID of the current workflow execution.

const executionId = $execution.id;

return [{json:{executionId}}];

$execution.resumeUrl

The webhook URL to call to resume a waiting workflow.

See the Wait > On webhook call documentation to learn more.

$execution.customData

This is only available in the Code node.

// Set a single piece of custom execution data
$execution.customData.set("key", "value");

// Set the custom execution data object
$execution.customData.setAll({"key1": "value1", "key2": "value2"})

// Access the current state of the object during the execution
const customData = $execution.customData.getAll()

// Access a specific value set during this execution
const customData = $execution.customData.get("key")

Refer to Custom executions data for more information.