> ## Documentation Index
> Fetch the complete documentation index at: https://dialnexa.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Workflow Lead Variable Keys

> Use the get_workflow_lead_variable_keys MCP tool on the DialNexa remote MCP server.

<span data-api-safety-label="read-only"><Badge color="gray" size="sm" shape="pill">Read only</Badge></span>

Returns the distinct dynamic variable names (from the uploaded lead CSV columns) available for a workflow's leads — e.g. to know what personalization fields exist.

## Parameters

| Name          | Type     | Required | Description                            |
| ------------- | -------- | -------- | -------------------------------------- |
| `workflow_id` | `string` | Yes      | The workflow ID, e.g. workflow\_abc123 |

## Before you call

* Connect and initialize the MCP client with OAuth or an API key for the intended workspace.
* Provide the required parameters: `workflow_id`.

## Example MCP request

Send `tools/call` after your client completes MCP initialization. Replace placeholder values with IDs and inputs from your workspace. For object and array parameters, follow the nested requirements in the parameter description instead of treating an empty value as complete.

```json theme={null}
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_workflow_lead_variable_keys",
    "arguments": {
      "workflow_id": "workflow_abc123"
    }
  }
}
```

The server returns one text content block. Parse `content[0].text` as JSON when the tool succeeds. See [MCP responses and errors](/docs/mcp-tools/errors) for the full envelope and failure behavior.

## Verify the result

Confirm the response is not marked `isError`, parse `content[0].text` as JSON, and verify that returned IDs and workspace data match the request.

## Retry safety

This tool does not change workspace data. Retrying after a transient transport failure is safe.

## Related guides

* [Connect to the DialNexa MCP server](/docs/mcp-tools/overview)
* [Workflows MCP tools](/docs/mcp-tools/workflows/overview)
* [MCP responses and errors](/docs/mcp-tools/errors)