WordPress REST API key Authentication method involves the REST APIs access on validation against the API key(token). Each time a request to access the API will be made, the authentication will be done against the key(token), and on the basis of the verification of the API key(token), the resources for that API request will be allowed to access.
1. If you want to protect your WordPress REST API Endpoints (eg. post, pages, and other REST APIs) from unauthenticated users but you don’t want to share users login credentials or client id, secret to authenticate the REST API, then you can use API Key authentication, which will generate a random authentication key for you. Using this key, you can authenticate any WordPress REST API on your site.
2. Suppose you have one Android/IOS Blog Application and you have already posted all your blogs on WordPress. Now you can get all the posts/blogs from the WordPress REST APIs but it is publicly accessible. So, whenever you want to protect your GET requests from public users you should use API Key Authentication Method.
Related Use case: Authentication of WordPress REST API endpoints for fetching WordPress posts/pages and other data.
Request: GET https://<domain-name>/wp-json/wp/v2/posts Header: Authorization : Bearer <token> Sample request: GET https://<domain-name>/wp-json/wp/v2/posts Header: Authorization : Bearer kGUfhhzXZuWisofgnkAsuHGDyfw7gfhg5s
Follow the steps below to make REST API request using Postman:
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