To use the Specify API and extract your design tokens you have to be authenticated. To do so, you have to generate a personal access token in your Access Tokens page. You will use this token in your Specify config file (
Generate one by going to your Settings by clicking on your name in the top right corner of the app. Head over the Access Tokens page and create a personal access token from there.
An access token must have a name and can will only be displayed one time at its creation.
Also, keep in mind that you can also generate a personal access token in the Playground in the API Documentation. Every personal access tokens, generated by yourself or by Specify, will be listed in the Personal Access Tokens page.