You’re using an invalid Content-Type header.
x-www-form-urlencoded isn’t a valid content-type.
The correct content type is application/x-www-form-urlencoded.
Essentially, the web server doesn’t know how to handle the content type you’re giving it to parse the parameters. This is why the request is failing with a 400 because WP is not getting anything in the POST body, including the action.
You may not need to provide this header at all though as it seems to be the default value.
Related Posts:
- Query WP REST API v2 by multiple meta keys
- Prevent 404 when using pre_get_posts to filter an archive page
- AJAX filter posts on click based on category
- How can I send data to admin-ajax via JS Fetch?
- Shortcodes not resolved in AJAX call response
- Ajax, filters and shortcodes
- Multiple Ajax Data Action
- Multiple filters for wp_get_archive
- How to change the order (priority) of registered filters (or actions) (e.g. for the_content)?
- Are there actions or filters I can use for Ajax calls?
- Does a plugin with a AJAX button filter exist? [closed]
- Sorting a specific taxonomy by archive date using URL
- wp_mail works with add_action(‘save_post’, …) but not an ajax action
- Is it possible to bind a function to a filter hook via Ajax?
- How To Override A WooCommerce AJAX Function
- Best practice: Custom Post Type / Filter / Load more
- Ajax filter – show all results that contain at least one filter
- AJAX Post Filter
- Archive Widget – Count only parent posts
- Display post after choice two taxonomy terms
- Ajax Filtering Pagination
- Modify category listing API response
- Change add_filter based on Ajax
- Filter posts by categories ajax is showing all the posts
- Filter WordPress Archive Widget to exclude posts with specific custom taxonomy term id
- URL to filter posts by post meta similar to shop/?product_cat=”painting”
- Code restricted to dashboard, running unexpectedly in the frontend (pre_get_post and admin-ajax.php)
- Hide a specific post from Archive Feed
- Post filter Month dropdown at front-end like wordpress backend
- How would I remove an inline googleAPI font script in the the parent theme header.php?
- Loading a sidebar on an Ajax call
- How could I create real-time filtering in this case?
- what is __return_false in filters
- Passing Additional Parameters to add_filter Callable
- How can I add an Author filter to the Media Library?
- Modify WordPress Rest Api Request/Response
- How to add some custom HTML into wordpress admin bar?
- Change upload directory on custom plugin page
- How to use the_excerpt in a filter hook?
- Add wrapper to only youtube videos via embed_oembed_html filter function
- Hook into admin post list page
- Add post/page ID to inserted links within the_content
- Possible to filter the posts or categories that XML-RPC users see in their mobile application?
- wp_link_pages output appears twice
- Changing a WordPress core function without hacking core
- Change WordPress RSS link with filter?
- How to remove get_post_metadata using remove_filter inside a class?
- Sorting and limitation with pre_get_posts
- Warning: Missing argument 2 for widget_title filter
- Use add_filter on concatenated string variable
- Change term name only on front
- How do I hide the current page’s title?
- Change name of existing post status type
- Header image automatically changes depending on season
- How to remove SKU’s from ALL products in Quick View – already remove from each product page
- Admin Backend – Search Pages only by title
- How to hide Ads in between posts on AMP? [closed]
- What is the downside of using a filter as a “poor man’s” dependency injection?
- BBPress changing default group activity
- Filter the_content to add something before each element?
- Filter by category and city for doctors and hospitals in wordpress
- Prevent reset password specific user role
- Change AJAX filter from POST to GET for URL Parameters
- Why is overwriting $GLOBALS killing the_content()?
- Sorting products by price ( regular + sale price )
- Create new custom field that calculates age
- Remove comments validation (remove filter?)
- Remove Site Name from wp_title WITHOUT removing from attribute
- Plugin default settings hook
- Filter Shortcodes when using get_page
- Usage of filters
- add_filter to the_content after apply_filters
- Where exactly does the edit_{taxonomy} hook fire?
- How to filter with dropdown in backend for custom data
- Is there any reason for the nested filters to be applied on the first case and not in the second one?
- Pagination don’t work with active filters
- Redirect an archive page to its relevant URL-friendly filtered page
- Show uploaded pdf files dynamically and filter by month name
- how to use substr with get_the_content()
- Add filter return false not working
- How to add markup to the wp-custom-header div
- How to take shortcode and content separately from a page?
- How to stop echoing gallery inside content?
- how to filter datalist table of wordpress
- get_the_archive_title hook unwanted changes!
- Is there a function to edit Blogs contents in Blogs page?
- Can’t set properly WordPress add_filter function
- apply_filters to $GLOBALS
- The title of an attachment is not working
- Removing a line from a WP core function (comment_template.php) – filter or other technique?
- How to remove a filter that is an anonymous object?
- Hide H1 Title using the_title filter
- get_the_excerpt on mobile still displays continue reading
- Filter and Search
- Passing form data via AJAX to REST API And displaying results
- AJAX: WordPress filters inside $html do not work as intended
- Why not showing all post by default in my jquery filter
- Adding arguments to WooCommerce Product Loop using AJAX
- How to use add_filter to add the extra data to existing array?
- ‘Problem’ with login_redirect filter – why does it lose the redirect_to parameter