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n8n metadata#

Methods for working with n8n metadata.

This includes:

  • Access to n8n environment variables for self-hosted n8n.
  • Metadata about workflows, executions, and nodes.
  • Information about instance Variables and External secrets.

Python support

You can use Python in the Code node. It isn't available in expressions.

Method Description Available in Code node?
$env Contains n8n instance configuration environment variables. ✅
$execution.customData Set and get custom execution data. Refer to Custom executions data for more information. ✅
$execution.id The unique ID of the current workflow execution. ✅
$execution.mode Whether the execution was triggered automatically, or by manually running the workflow. Possible values are test and production. ✅
$execution.resumeUrl The webhook URL to call to resume a workflow waiting at a Wait node. ✅
$getWorkflowStaticData(type) View an example. Static data doesn't persist when testing workflows. The workflow must be active and called by a trigger or webhook to save static data. This gives access to the static workflow data. ✅
$("<node-name>").isExecuted Check whether a node has already executed. ✅
$itemIndex The index of an item in a list of items. ❌
$nodeVersion Get the version of the current node. ✅
$prevNode.name The name of the node that the current input came from. When using the Merge node, note that $prevNode always uses the first input connector. ✅
$prevNode.outputIndex The index of the output connector that the current input came from. Use this when the previous node had multiple outputs (such as an If or Switch node). When using the Merge node, note that $prevNode always uses the first input connector. ✅
$prevNode.runIndex The run of the previous node that generated the current input. When using the Merge node, note that $prevNode always uses the first input connector. ✅
$runIndex How many times n8n has executed the current node. Zero-based (the first run is 0, the second is 1, and so on). ✅
$secrets Contains information about your External secrets setup. ✅
$vars Contains the Variables available in the active environment. ✅
$version The node version. ❌
$workflow.active Whether the workflow is active (true) or not (false). ✅
$workflow.id The workflow ID. ✅
$workflow.name The workflow name. ✅
Method Description
_env Contains n8n instance configuration environment variables.
_execution.customData Set and get custom execution data. Refer to Custom executions data for more information.
_execution.id The unique ID of the current workflow execution.
_execution.mode Whether the execution was triggered automatically, or by manually running the workflow. Possible values are test and production.
_execution.resumeUrl The webhook URL to call to resume a workflow waiting at a Wait node.
_getWorkflowStaticData(type) View an example. Static data doesn't persist when testing workflows. The workflow must be active and called by a trigger or webhook to save static data. This gives access to the static workflow data.
_("<node-name>").isExecuted Check whether a node has already executed.
_nodeVersion Get the version of the current node.
_prevNode.name The name of the node that the current input came from. When using the Merge node, note that _prevNode always uses the first input connector.
_prevNode.outputIndex The index of the output connector that the current input came from. Use this when the previous node had multiple outputs (such as an If or Switch node). When using the Merge node, note that _prevNode always uses the first input connector.
_prevNode.runIndex The run of the previous node that generated the current input. When using the Merge node, note that _prevNode always uses the first input connector.
_runIndex How many times n8n has executed the current node. Zero-based (the first run is 0, the second is 1, and so on).
_secrets Contains information about your External secrets setup.
_vars Contains the Variables available in the active environment.
_workflow.active Whether the workflow is active (true) or not (false).
_workflow.id The workflow ID.
_workflow.name The workflow name.