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  1. Pre and Post Processors
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  1. Pre and Post Processors

Extract Variable

Apidog allows you to visually extract values from API responses and save them as variables for use in subsequent requests.

How to Extract Variables#

1
Add Extract Variable Processor
In the Post Processors section of your request, hover over + Add and select Extract Variable.
Design-first Mode
Request-first Mode
Post Processors Design Mode
2
Configure Extraction Settings
Variable Name: Define the name of the variable to store.
Scope: Choose where the variable will be accessible (Local, Environment, or Global).
Source: Select where to extract data from (e.g., Response JSON, Header, Cookie).
3
Define Extraction Rule
For JSON or XML responses, use JSONPath or XPath to target specific data.
Configure Extraction
4
Execute and Verify
Click Send. The variable will be updated, and you can view the extraction log in the Console.
Extraction Log

Quick Extraction from Response#

You can quickly create extraction rules directly from the response panel:
1.
Hover over a field in the response.
2.
Click Extract Variable.
3.
The rule will be automatically populated in the Post Processors.
Quick Extract from Response

Supported Extraction Sources#

SourceDescriptionMethod
Response JSONExtract data from JSON bodies.JSONPath
Response XMLExtract data from XML bodies.XPath
Response TextExtract text from raw responses.Regular Expressions (Regex)
Response HeaderExtract specific header values.Header Name
Response CookieExtract specific cookie values.Cookie Name
Response TimeStore the request duration.N/A

JSONPath Extraction Tool#

To help you construct correct JSONPath expressions, Apidog provides a visual extraction tool:
1.
Click the icon next to the JSONPath input field.
Open JSONPath Tool
2.
Enter your expression. The tool shows the JSON response on the left and the extraction result on the right.
JSONPath Tool Interface
Handling Arrays
Elements with wildcards (e.g., books[*]) return an array. To extract a single value without brackets, enable Continue extracting and specify the array index in the tool.
Modified atΒ 2026-01-14 09:10:00
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