A block is a fundamental unit of a flow. Each block stores information or performs a task. You can configure a block to fit your specific use case. Blocks may have input ports, output ports, or both. You can use these ports to connect your blocks and route information or trigger a flow that’s running in the Postman cloud.
The blocks reference section contains a topic for each block describing its inputs, outputs, setup, and usage options. These topics also include links to example flows and related blocks.
The following types of blocks are available in Postman Flows:
- Actions - Used to perform actions like sending an HTTP request or referencing another flow.
- Trigger - Start the run of a flow or send data back to a request made to a deployed flow’s URL.
- AI - Use natural language to generate text and images, and send AI requests.
- Logic - Route data in a flow using conditions, evaluations, or branching logic.
- Looping - Repeat a set of blocks based on a count or list.
- Visualize - Display data as graphs, tables, or raw output.
- Data - Create and manipulate data types like strings, numbers, lists, and objects.
Insert data blocks into other blocks
Some blocks support inserting data blocks to access the data blocks’ values. For example, you can insert a String block into a List block to include the String block’s value as an item in the List block’s array.
To insert a block, click 
Add data blocks and select a block from the dropdown list.
