“JSON Content Importer PRO” and “Build n:n Toolset-CPT-Relationships”:

Show API JSON Data in WordPress with the Plugins JsonContentImporter PRO and Toolset
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JSON Content Importer PRO:

How to: Use an API and get access to JSON
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How to: Create Custom Post Types out of JSON
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Free JSON Content Importer

Install:

How to: Install free Version of the JSON Content Importer
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How to: First Shortcode with JSON Content Importer

How to: First Shortcode with JSON Content Importer
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How to: Wikipedia API, JSON Content Importer and WordPress

How to: Wikipedia API, JSON Content Importer and WordPress
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Use Gutenberg:

Easy JSON Content Importer 1.3.0
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