Environment Variables

Environment variables help you manage dynamic values across your API requests. You can store API keys, base URLs, tokens, and other data that changes between different environments like development, staging, and production.

🎯 Variable Scopes

Fetch Client supports three levels of variables, giving you flexibility in how you organize your data:

• Global Variables - Available across all collections and requests in your workspace
• Collection Variables - Available only within a specific collection
• Request Variables - Available only for a single request

Use the {{variableName}} syntax to reference variables anywhere in your requests, including URLs, query parameters, headers, and request body.

🔐 Security Features

Your data is stored in encrypted form. To enable encryption, turn on the Encryption option in Fetch Client Settings. By default, Fetch Client uses a built-in encryption key. For stronger security, configure your own encryption key to protect your stored variables. You can manage encryption settings at any time from Fetch Client Settings.

📥 Importing Variables

You can import variables from JSON files in multiple formats:

1. Open the Environment Variables tab in the sidebar
2. Click the menu icon and select Import
3. Choose your variable file
4. Your variables are now ready to use in all requests

info

Supported formats:

• Fetch Client - Native format v1 and v2 (recommended)
• Postman - v2.1
• Thunder Client - v1.2

📤 Exporting Variables

Export your variables to JSON format (with or without encryption) for backup or sharing with your team. This makes it easy to move variables between workspaces or share configurations with team mates.

• Export single variable
• Bulk Export

<sup>Bulk Export Menu


Bulk Export</sup>

♻️ Dynamic Variable Assignment

Extract data from API responses and automatically save them as variables for use in subsequent requests.

You can capture values from:

• Response body (JSON properties)
• Response headers
• Cookies
• Expression results

This feature is useful for workflows where you need to:

• Save authentication tokens from login responses
• Chain multiple API calls together
• Store dynamic IDs or values for testing

🧮 Expression Engine

Fetch Client includes a built-in expression engine that lets you perform calculations, compare values, work with dates, and evaluate conditions.

💡 Variables

Variables can be referenced directly inside expressions.

tokenExpiry < now()
retryCount < 5
status == "ACTIVE"

🗂️ Supported Data Types

Function	Description	Example
now()	Current timestamp	now()
date()	Current date/time	date()
parseDate()	Convert string to timestamp	parseDate("2026-07-20")
seconds()	Convert seconds to milliseconds	seconds(30)
minutes()	Convert minutes to milliseconds	minutes(5)
hours()	Convert hours to milliseconds	hours(2)
days()	Convert days to milliseconds	days(7)
addDays()	Add days	addDays(now(), 7)
addHours()	Add hours	addHours(now(), 2)
addMinutes()	Add minutes	addMinutes(now(), 30)
formatDate()	Format date	formatDate(now(), "yyyy-MM-dd")
contains()	Contains text	contains(name, "John")
matches()	Regex match	matches(email, ".*@gmail.com")
exists()	Value exists	exists(token)
empty()	Value is empty	empty(token)
between()	Value within range	between(age, 18, 60)