Can I use a jQuery Ajax request in Code Snippets Plugin for WordPress?

You’ll need to look at the server side logs to see what’s actually causing the 400. Without this, it’s just conjecture. With it, you should see exactly what’s causing the problem.

However, I conjecture that you’re lacking authentication headers, or an authentication request. I’m not seeing anything related to authentication in your AJAX request, and anything POST’ing to admin-ajax.php probably should prove it’s an admin first. Take a look at this:

How do I correctly setup an AJAX nonce for WordPress REST API? . You’ll probably need to adjust it a bit, since it looks like they’re using a public endpoint that wants user authentication, while you’re using an admin endpoint, but in either case you need some sort of authentication (by default.)

Related Posts:

  1. How can I fetch loop of post titles via AJAX?
  2. Retrieve POST data from AJAX call
  3. Do I require the use of nonce?
  4. WordPress Ajax always returns a 404 error
  5. problem with ajax and the path to the php page
  6. How to use wp_localize_script in a WordPress page other than functions.php?
  7. Security – Ajax and Nonce use [closed]
  8. Update WordPress Custom Field with AJAX on cached page
  9. Targeting single page with JS
  10. Problem with WordPress Ajax form
  11. Click loads template via ajax
  12. How to retrieve the content (with a specific ID) via ajax by clicking a link tag
  13. How to display something in a div when the user clicks on a text in another div – no page refresh [closed]
  14. How to speed up admin-ajax.php in wordpress
  15. Returning a value from a PHP page
  16. Sending jsPDF documents to the server
  17. Use ajax from function.php
  18. wp_insert_post() is returning the correct post ID, no failure, but the post content does not get updated
  19. How to test nonce with AJAX – Plugin development
  20. Checking for new message using AJAX and PHP. Server overload?
  21. AJAX request status 200 but no actual “response”
  22. Ajax loaded form replaces form action with Ajax url
  23. prevent default not stopping page refresh. Passing form information to and from php with ajax in a wordpress site
  24. Ajax date_query not working past the first iteration
  25. Why ajax doesn’t work on certain wordpress hooks and reload the page instead?
  26. AJAX pagination, update current page
  27. Save Search System
  28. adjust section according to country?
  29. dynamic dependent select dropdown
  30. Change “add to cart” button color based on Woocommerce product category [closed]
  31. Ajax request returns ‘Array’. How to output the actual results?
  32. How to add a do_action on refreshing of WP customizer?
  33. [jQuery]Adding shortcode
  34. Display parent and child taxonomies in separate drop down select fields
  35. Show success or error messages in Ajax response to WordPress custom registration form
  36. How to add a Custom Mailchimp AJAX Newsletter Subscribe Form
  37. Fancybox type popup window that’s not an iframe
  38. WordPress admin-ajax.php 400 bad request
  39. Ajax contact form return 0
  40. AJAX – Returning Two JSON Objects with One PHP Function
  41. Pull GetOption() variable into jQuery dynamically created html
  42. Add Ajax Hooks and Call from Custom Template PHP
  43. WordPress Ajax Always returning 0
  44. How to keep track of when a vote is cast?
  45. WordPress plugin admin page – using WordPress function in linked php file
  46. A $_POST should occur when submit form but is not?
  47. My jQuery Ajax form submit is still refreshing page?
  48. Shortcode to pull posts
  49. Ajax search shows all results when user empties input?
  50. Why i can’t get custom fields value or post ID via Ajax?
  51. Output votes to div dynamically in wordpress
  52. Get uploaded image and attach it to the new post
  53. Admin-ajax php not working on new wordpress version
  54. Proper way to use WordPress function with AJAX PHP file
  55. Live search from database table
  56. Add a counter for mouseovers (custom field)
  57. Accessing an API with jQuery and AJAX
  58. Change Query Arguments (filter) with jQuery/Ajax or PHP?
  59. How to set variables with AJAX request to use in another function in WordPress
  60. Search Ajax Call – Use Form Data in Response
  61. Why does PHP called with Jquery AJAX not allow additional php code to be added?
  62. WordPress cascading dropdown selection search based on Parent Page & Child Page
  63. Database entry removed on browser refresh, Ajax PHP jQuery
  64. jquery & ajax getting data from php in wordpress . admin-ajax.php returns 400
  65. How do I call a value from the datase using ajax
  66. Ajax result show in console if is called outside function and not showing in array
  67. Admin-ajax.php 404 error
  68. Where to add my PHP codes for AJAX Jquery to work?
  69. How to change PHP variables with AJAX request in WordPress
  70. How to use wp_ajax_set_post_thumbnail?
  71. Can’t make lazy load for my site, help!
  72. How to reload a php script, using AJAX and jQuery
  73. wp_ajax_ 400 Bad Request
  74. update_post_meta Not Processing Array Data (Not Sure What I Am Missing)
  75. Input field duplicates on form submit by jQuery
  76. How to echo a PHP code into WooCommerce variation product?
  77. How to call a function from functions.php with ajax?
  78. Custom theme admin-ajax.php 400 (Bad Request)
  79. number of posts with “Load More”
  80. Find the method which AJAX GET calls
  81. Ajax not updating to database
  82. WordPress 404 when using AJAX to call php function
  83. how use php query in AJAX jquery
  84. Ajax Load more CPT via shortcode
  85. Submitting my form to the database and then redirecting to payment site
  86. Pass the updated value of aid from form using ajax
  87. ajax form with multiple submit buttons and values
  88. How to run ajax in WordPress Post?
  89. Adding instant search to wordpress page
  90. Add php function into .js file (for tinyMCE button)
  91. best way to communicate between php and jquery/javascript
  92. Fatal error: Uncaught Error: Call to undefined function wp_nav_menu()
  93. ajax form function error
  94. AJAX: WordPress filters inside $html do not work as intended
  95. Why not showing all post by default in my jquery filter
  96. Load Meta box value into div AJAX [duplicate]
  97. ajax problems on loading page [closed]
  98. Help with AJAX request
  99. I got this error POST https://localhost/meraboilerwp/[object%20Object] 404 (Not Found)
  100. custom AJAX filtering logic and outputting results into an Elementor Loop Grid widget