How to Handle Cookies in Postman: Easy Steps and Fixes

In Postman, you can handle cookies by using the Cookies tab to view, add, or delete cookies for your requests. You can also programmatically manage cookies using pm.cookies in scripts to read or set cookies during tests.

Why This Happens

Sometimes, cookies are not sent or received as expected in Postman because the cookies are not properly set or managed. This can happen if you try to manually add cookies in the request headers instead of using Postman's cookie manager, or if cookies are not saved between requests.

http

GET /api/data HTTP/1.1
Host: example.com
Cookie: sessionid=abc123; userid=789

Output

Cookies may not be sent or updated correctly, causing authentication or session errors.

The Fix

Use Postman's built-in Cookies tab to manage cookies instead of manually adding them in headers. You can view, add, edit, or delete cookies for the domain. Also, use pm.cookies in the Tests or Pre-request Script tab to programmatically access or set cookies.

javascript

// Example: Access a cookie value in Tests tab
const sessionId = pm.cookies.get('sessionid');
console.log('Session ID:', sessionId);

// Example: Set a cookie before request
pm.cookies.jar().set('example.com', '/', 'userid', '789', function(error) {
  if (error) console.error(error);
});

Output

Session ID: abc123
Cookie 'userid' set for example.com

Prevention

Always use Postman's cookie manager to handle cookies instead of manually editing headers. Keep cookies enabled in settings to allow automatic cookie handling. Use scripts to verify cookies during tests and clear cookies when needed to avoid stale data.

• Enable 'Automatically follow redirects' to preserve cookies across redirects.
• Clear cookies regularly to prevent conflicts.
• Use pm.cookies API for reliable cookie access.

Related Errors

Common related issues include:

• Cookies not sent: Happens if cookies are manually added in headers but not saved in Postman cookie jar.
• Session expired: Occurs if cookies are stale or missing; fix by clearing cookies and re-authenticating.
• Cross-domain cookie issues: Cookies are domain-specific; ensure requests match cookie domain.

Key Takeaways

Use Postman's Cookies tab to manage cookies instead of manual header edits.

Access and set cookies programmatically with pm.cookies in scripts.

Enable automatic cookie handling and clear cookies to avoid stale sessions.

Cookies are domain-specific; ensure requests match cookie domains.

Use scripts to verify cookie presence and values during tests.