Newest post because yes

We'll be using Contentful's Content Delivery API since we want to retrieve published data only, so be sure to grab the Content Delivery API key and not the Content Preview API key.

In your gatsby-config.js file, add the configuration object to the plugins array:

plugins: [ ... { resolve: `gatsby-source-contentful`, options: { spaceId: `YOUR_SPACE_ID`, accessToken: `YOUR_CONTENT_DELIVERY_API_KEY` } } ],

Author
Tonye | Sensei of this blog.