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---
#https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4
contentType: reference
---
# `execution`
## `execution.id`
Contains the unique ID of the current workflow execution.
=== "JavaScript"
```js
let executionId = $execution.id;
```
=== "Python"
```python
executionId = _execution.id
```
## `execution.resumeUrl`
The webhook URL to call to resume a [waiting](/integrations/builtin/core-nodes/n8n-nodes-base.wait.md) workflow.
See the [Wait > On webhook call](/integrations/builtin/core-nodes/n8n-nodes-base.wait.md#on-webhook-call) documentation to learn more.
## `execution.customData`
This is only available in the Code node.
=== "JavaScript"
```js
// 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
var customData = $execution.customData.getAll()
// Access a specific value set during this execution
var customData = $execution.customData.get("key")
```
=== "Python"
```python
# 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
customData = _execution.customData.getAll()
# Access a specific value set during this execution
customData = _execution.customData.get("key")
```
Refer to [Custom executions data](/workflows/executions/custom-executions-data.md) for more information.
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