Variables and Expressions

Description

Variables enable value reuse across steps, while expressions compute data at runtime.

Motivation

Using variables keeps flows concise and simplifies passing IDs or tokens between steps.

Example

Copy{
  "vars": {
    "token": "XXXX",
    "collection": "uuid | prepend \"test-\""
  }
}

Advanced Example

Copy{
  "vars": {
    "host": "https://api.example.com",
    "auth": "basic {{username}}:{{password}}"
  },
  "steps": [
    { "title": "List users", "method": "GET", "url": "{{host}}/users", "basic_auth": "{{auth}}" }
  ]
}

Questions & Answers

Q: Can expressions reference previous responses?
A: Yes. Use response.bodyJson or other fields.

Comments

Store authentication tokens as variables to keep credentials centralized.

Other Uses

Combine expressions with the uuid helper to generate unique IDs during tests.