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Question

"authentication failed: 404 Not Found. Make sure the Zapier WordPress plugin is installed on your site." Error when connecting to Wordpress

  • December 28, 2025
  • 3 replies
  • 28 views
A

I've been trying to connect my custom WordPress site to Zapier, but I haven't been able to get it to work. I've checked the Zapier forum, but I haven't found the right or permanent solution.

I've deactivated all plugins and changed the permalinks back to their defaults, but Zapier still won't connect to WordPress.

 

Is there a permanent solution?

 

Print error

 

Disabled all plugin, except Zapier 

 

 

3 replies

Troy Tessalone
Zapier Orchestrator & Solution Partner
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  • Troy TessaloneZapier Orchestrator & Solution Partner
  • Zapier Orchestrator & Solution Partner
  • December 28, 2025

Hi ​@atroncosom 

Help links for using WordPress in Zaps: https://zapier.com/apps/wordpress/integrations#help

⚡ Troy Tessalone - AutomationAce.com | Platinum Zapier Solution Partner | #1 Zapier Community Contributor
A

This usually isn’t a Zapier bug it’s almost always a REST API or hosting issue on the WordPress side.

A few things to double-check beyond plugins and permalinks:

• Make sure WP REST API is accessible (/wp-json/)  some hosts or security layers block it
• Check if your host (Cloudflare, WAF, ModSecurity) is blocking external POST requests
• Ensure your WordPress application password was generated correctly and not revoked
• Confirm your site is publicly accessible (no basic auth, staging lock, or IP restriction)
• Look at server error logs Zapier connection attempts usually fail silently unless you check logs

If plugins are disabled and permalinks reset, 90% of the time the fix is adjusting hosting/security rules, not WordPress itself.

If you want, I’m happy to walk through a quick checklist to pinpoint where it’s breaking.

SamB
Community Manager
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  • SamBCommunity Manager
  • Community Manager
  • January 14, 2026

Hey there ​@atroncosom 👋

Just came across this and wanted to check how you’re getting on. Did that guide Troy shared help to point you in the right direction? 

If not, can you tell us a bit more about your current setup? For example is the site on Wordpress.com, or is it self-hosted? If it’s self-hosted, can you check the host settings to make sure there’s nothing on that side that might be blocking Zapier’s access to view that the plugin has been installed?

Also is it a Wordpress MultiSite? If it is, you’ll want to make sure the plugin wasn’t network activated, it needs to me installed individually on each site that it’s needed.

Keep us posted on your progress, want to make sure you’re all set! 🙂

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