Title: “error”:”SSE streaming not supported.
Last modified: May 22, 2026

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# “error”:”SSE streaming not supported.

 *  Resolved [geekamaru](https://wordpress.org/support/users/geekamaru/)
 * (@geekamaru)
 * [1 month, 1 week ago](https://wordpress.org/support/topic/errorsse-streaming-not-supported/)
 * Hi,
 * I installed the Easy MCP AI plugin on my WordPress site and tried to connect 
   it as an MCP server from Claude.ai, but I keep getting the following error:
 * “Couldn’t reach the MCP server. You can check the server URL and verify the server
   is running.”
 * When I open the MCP endpoint URL directly in my browser, I get this response:
 * {“error”:”SSE streaming not supported. Use POST for MCP communication.”}
 * The plugin seems to be running fine, but the connection from Claude.ai fails.
 * Could you help me figure out what’s wrong and how to fix it?
 * Thanks in advance for your help.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Easy MCP AI](https://wordpress.org/support/users/easymcpai/)
 * (@easymcpai)
 * [1 month, 1 week ago](https://wordpress.org/support/topic/errorsse-streaming-not-supported/#post-18915838)
 * Hello,
 * The “Couldn’t reach the MCP server” error message means Claude cannot access 
   your website URL. This could be due to several reasons:
    1. You have a rule in Cloudflare that blocks AI bots, certain IP addresses, countries,
       etc.
    2. Your hosting provider might have rules that block some AI bots or IP addresses.
       We found some reports about this on SiteGround.
 * To resolve this:
    1. Whitelist Anthropic IP addresses: [https://platform.claude.com/docs/en/api/ip-addresses](https://platform.claude.com/docs/en/api/ip-addresses),
       or disable any AI bot/crawler restrictions on Cloudflare (if you use it) or 
       any related restrictions from your host or Cloudflare.
    2. Try another AI client, such as Claude Code, which connects from localhost.
 * Please let me know which hosting provider you use and whether you are using Cloudflare
   so we can investigate further.
 *  Plugin Author [Easy MCP AI](https://wordpress.org/support/users/easymcpai/)
 * (@easymcpai)
 * [3 weeks, 2 days ago](https://wordpress.org/support/topic/errorsse-streaming-not-supported/#post-18930741)
 * Since we have not received any reply for two weeks, we will mark this as resolved.
   Please respond with details if you still encounter any issues.
 * Thank you.

Viewing 2 replies - 1 through 2 (of 2 total)

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## Tags

 * [IP Blacklist](https://wordpress.org/support/topic-tag/ip-blacklist/)

 * 2 replies
 * 2 participants
 * Last reply from: [Easy MCP AI](https://wordpress.org/support/users/easymcpai/)
 * Last activity: [3 weeks, 2 days ago](https://wordpress.org/support/topic/errorsse-streaming-not-supported/#post-18930741)
 * Status: resolved