Magento 2 Oauth error invalid signature while try to get request token from postman

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  • I think your post URL is wrong. try this example.com/index.php/rest/V1/integration/admin/token
    – Abdul
    Commented Mar 30, 2018 at 5:34
  • I am using oauth credentials to authenticate the application
    – Hariharan
    Commented Mar 30, 2018 at 6:09
  • Have you found a solution to this issue?
    – pablo
    Commented Apr 23, 2018 at 16:59
  • Not yet........
    – Hariharan
    Commented Apr 24, 2018 at 5:33
  • in postman uncheck "encode signature" option.
    – Himanshu
    Commented Nov 3, 2018 at 11:59

1 Answer 1


If you supply all of those values, you don't have to use the access or request routes. postman will take care of the rest.

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Typically I've noticed that some routes are slightly different; ie.

use: http://your url here/rest/V1/products?searchCriteria=

instead of: http://your url here/rest/V1/products?searchCriteria

Notice the difference with the =

The only time you need to use those routes are when you post to your callback and identity urls.

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