Scripts

Scripts let you attach JavaScript snippets to individual HTTP requests. They run in a sandboxed context with access to the request and response data.

Script Types

Pre-request Script

Runs before the request is sent. Use it to:

• Log request details with console.log()
• Modify request properties programmatically
• Prepare dynamic data

Available API:

Variable	Type	Description
console	object	console.log(), console.warn(), console.error(), console.info() for debugging
request.method	string	HTTP method (GET, POST, etc.)
request.url	string	The request URL
request.headers	object	Key-value map of request headers
request.params	object	Key-value map of query parameters
request.body	string	Raw request body

// Pre-request script example
console.log('Sending', request.method, 'to', request.url)
console.log('Headers:', JSON.stringify(request.headers))

Post-response Script

Runs after the response is received. All pre-request variables are available, plus:

Variable	Type	Description
response.statusCode	number	HTTP status code (e.g. 200)
response.statusText	string	Status text (e.g. “OK”)
response.headers	object	Key-value map of response headers
response.body	string	Raw response body
response.contentType	string	Content-Type header value

// Post-response script example
console.log('Status:', response.statusCode, response.statusText)
console.log('Response body:', response.body)

if (response.statusCode === 200) {
  console.log('Request succeeded!')
} else {
  console.warn('Request failed with status', response.statusCode)
}

Using Scripts

1. Open a request
2. Click the Scripts tab
3. Write JavaScript in the Pre-request Script or Post-response Script textarea
4. Send the request — scripts execute automatically

Script Logs

Script output from console.log/warn/error/info appears in the script logs panel below the editors. Each entry includes:

• Log type (log, warn, error, info)
• Timestamp
• Message content

Example: Full Workflow

// Pre-request: Log the request
console.log('Starting request to', request.url)

// Post-response: Validate the response
if (response.statusCode >= 400) {
  console.error('Error:', response.statusCode, response.body)
} else {
  console.log('Success:', response.statusCode)
  const data = JSON.parse(response.body)
  console.log('Items count:', data.length)
}