> For the complete documentation index, see [llms.txt](https://docs.zaia.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zaia.app/workflows/workflow-nodes/agent-request-node.md).

# Agent Request Node

The **Agent Request** node allows your Workflow to be triggered by an **Agent tool call** inside Endless.\
When an Agent decides it needs to use a Workflow, this node is the entry point.

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### 🛠️ How It Works

* Agents can call Workflows just like they call MCP tools.
* When this happens, the Workflow starts from the **Agent Request Node**.
* The request can include inputs (parameters) that your Workflow can use in the next steps.

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### ⚙️ Configuration Options

* **Parameters** → define the input fields your Agent will send when triggering this Workflow.
* **Validation** → optional rules to ensure required parameters are provided.

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### 📌 Example Use Cases

* An Agent needs to **generate a custom report** → it calls a Workflow that collects data and formats it.
* An Agent needs to **start an approval process** → it triggers a Workflow that sends a notification.
* An Agent needs to **query an external API** indirectly → it passes the request to a Workflow that handles it.

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⚡ **Tip:** Combine the **Agent Request Node** with an **Agent Response Node** so your Workflow can return results directly back to the Agent.