# About Maestro Flow

> Maestro Flow in Studio Web for building visual orchestrations using nodes that connect APIs, AI agents, human approvals, document processing, and enterprise services on the Maestro runtime.

:::note
Maestro Flow is in Preview.
:::

Maestro Flow is a visual canvas for building and deploying automations that connect APIs, AI agents, human approvals, document processing, and enterprise services. You design a Maestro Flow by placing nodes on a canvas and connecting them, then debug and publish it directly from Studio Web.

Flow processes run on the UiPath Maestro runtime alongside RPA workflows, API workflows, and Maestro BPMN processes. If you have used Maestro BPMN before, Flow is a different modeler built on the same runtime — designed for developers who prefer a visual, node-based experience over BPMN notation.

## Node types

Nodes are organized into categories in the **Add node** panel:

| Category | Description |
|---|---|
| **Agent** | UiPath agents and external AI agents |
| **Agentic process** | Invoke a Maestro BPMN process |
| **API workflow** | Call an API workflow |
| **Connector** | Integration Service connector actions |
| **Control** | Branching, looping, and flow control nodes |
| **Flow** | Invoke another Flow as a subflow |
| **Human task** | Human approvals and action apps |
| **RPA workflow** | Invoke an RPA workflow |
| **Tool** | Data transformation and scripting nodes |
| **Document processing** | Summarize or extract data from documents |

### Agent

When you select **Agent**, the following options appear:

| Node | Description |
|---|---|
| **Autonomous Agent** | A UiPath AI agent that completes tasks autonomously |
| **External AI agents** | Third-party AI agents — includes **Databricks Agent**, **Google Vertex**, **Microsoft Azure AI Foundry**, and **Snowflake Cortex** |

### Control

When you select **Control**, the following options appear:

| Node | Description |
|---|---|
| **Mock** | Placeholder node for prototyping — does nothing at runtime |
| **Decision** | Branches to a true or false path based on a JavaScript expression |
| **Loop** | Iterates over a collection, executing its body once per item |
| **Merge** | Joins parallel branches back into a single path |
| **Switch** | Routes to one of several branches based on an ordered list of conditions |
| **Delay** | Pauses execution for a specified duration or until a target date |
| **Subflow** | Groups a set of nodes into a reusable, self-contained unit |
| **End** | Marks the end of a workflow path |
| **Terminate** | Ends the flow immediately with a success or failure status |

### Human task

When you select **Human task**, the following options appear:

| Node | Description |
|---|---|
| **Quick Form** | Fast inline approvals with inline debug support |
| **Action App** | A customized coded action app service |

### Tool

When you select **Tool**, the following options appear:

| Node | Description |
|---|---|
| **HTTP Request** | Calls any REST API endpoint and returns the response |
| **Script** | Runs custom JavaScript code |
| **Batch Transform** | Adds AI-generated columns to a CSV |
| **Transform** | Reshapes and converts data |
| **Filter** | Filters data by conditions |
| **Map** | Renames and transforms fields |
| **Group By** | Groups data by a field with aggregation |
| **Create queue item** | Adds an item to an Orchestrator queue |
| **Create and wait for queue item** | Adds a queue item and waits for it to complete |

### Document processing

When you select **Document processing**, the following options appear:

| Node | Description |
|---|---|
| **Summarize** | Creates a complex summary of a document |
| **Extract** | Extracts structured data using an IXP model deployed to a folder in your tenant |

For the full node reference, tutorials, and observability guidance, refer to the [Maestro Flow documentation](https://docs.uipath.com/maestro/automation-cloud/latest/user-guide/what-is-flow).

## Related links

- [Choosing a Maestro modeler](https://docs.uipath.com/maestro/automation-cloud/latest/user-guide/choosing-a-maestro-modeler)
- [Your first Flow](https://docs.uipath.com/maestro/automation-cloud/latest/user-guide/quickstart)