# Cursor services network issues since 3.9

**URL:** <https://forum.cursor.com/t/cursor-services-network-issues-since-3-9/165407>\
**Category:** Help\
**Tags:** networking\
**Created:** [July 10, 2026, 3:02pm UTC](https://forum.cursor.com/t/cursor-services-network-issues-since-3-9/165407 "2026-07-10T15:02:52Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![Karl5](https://avatars.discourse-cdn.com/v4/letter/k/47e85d/32.png) [@Karl5](https://forum.cursor.com/u/Karl5)\
**Post date:** [July 10, 2026, 3:02pm UTC](https://forum.cursor.com/t/cursor-services-network-issues-since-3-9/165407/1 "2026-07-10T15:02:52Z")

</div>

Hi,

since Cursor 3.9 most network services do not work anymore on Windows 11. Still the same in recent 3.11.13. When I install Cursor 3.8 most services work (not all). I have already set HTTP Compatibility Mode to HTTP/1.1.

Could anybody help?

Cursor Network Diagnostic Results

FAILED (10): DNS, SSL, API, Ping, Chat, Agent, Authentication UI, Cursor Tab, Agent Endpoint, Codebase Indexing

DNS: Error: net::ERR\_NAME\_NOT\_RESOLVED  
Logs:  
[2026-07-10T14:22:44.261Z] Host: api2.cursor.sh  
[2026-07-10T14:22:44.261Z] Servers: 10.50.255.1,10.50.255.4  
[2026-07-10T14:22:44.261Z] Error: Error: getaddrinfo ENOTFOUND api2.cursor.sh  
[2026-07-10T14:22:44.264Z] Error: Error: getaddrinfo ENOTFOUND api2.cursor.sh  
[2026-07-10T14:22:44.265Z] Error: Error: getaddrinfo ENOTFOUND api2.cursor.sh  
[2026-07-10T14:22:44.268Z] Error: Error: getaddrinfo ENOTFOUND api2.cursor.sh  
[2026-07-10T14:22:44.277Z] Host: api2.cursor.sh  
[2026-07-10T14:22:44.277Z] Servers: system  
[2026-07-10T14:22:44.277Z] Error: Error: net::ERR\_NAME\_NOT\_RESOLVED  
[2026-07-10T14:22:44.278Z] Error: Error: net::ERR\_NAME\_NOT\_RESOLVED  
[2026-07-10T14:22:44.279Z] Error: Error: net::ERR\_NAME\_NOT\_RESOLVED  
[2026-07-10T14:22:44.279Z] Error: Error: net::ERR\_NAME\_NOT\_RESOLVED  
[2026-07-10T14:22:44.279Z] Result: Error: net::ERR\_NAME\_NOT\_RESOLVED

SSL: Error: getaddrinfo ENOTFOUND api2.cursor.sh  
Logs:  
[2026-07-10T14:22:44.251Z] Start  
[2026-07-10T14:22:44.261Z] Error: getaddrinfo ENOTFOUND api2.cursor.sh in 10ms

API: Error: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh  
Logs:  
[2026-07-10T14:22:44.251Z] Start  
[2026-07-10T14:22:44.267Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh

Ping: Error: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh  
Logs:  
[2026-07-10T14:22:44.252Z] Sending ping 1  
[2026-07-10T14:22:44.268Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh

Chat: Error: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh  
Logs:  
[2026-07-10T14:22:44.252Z] Starting streamSSE  
[2026-07-10T14:22:44.268Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh

Agent: Error: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh  
Logs:  
[2026-07-10T14:22:44.253Z] Starting stream  
[2026-07-10T14:22:44.253Z] Pushing first message  
[2026-07-10T14:22:44.268Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND api2.cursor.sh

Marketplace: Success  
Logs:  
[2026-07-10T14:22:44.248Z] Host: [marketplace.cursorapi.com](http://marketplace.cursorapi.com)  
[2026-07-10T14:22:44.362Z] Response in 114ms  
[2026-07-10T14:22:44.362Z] Response: 200  
[2026-07-10T14:22:44.362Z] Response Type: cors  
[2026-07-10T14:22:44.362Z] Server: null  
[2026-07-10T14:22:44.362Z] Result: OK in 114ms

Authentication: Success  
Logs:  
[2026-07-10T14:22:44.249Z] Host: prod.authentication.cursor.sh  
[2026-07-10T14:22:44.808Z] Response: 200 in 559ms

Authentication UI: Error: getaddrinfo ENOTFOUND authenticator.cursor.sh  
Logs:  
[2026-07-10T14:22:44.251Z] DNS lookup: authenticator.cursor.sh  
[2026-07-10T14:22:44.263Z] Error: getaddrinfo ENOTFOUND authenticator.cursor.sh

Cursor Tab: Error: getaddrinfo ENOTFOUND api3.cursor.sh  
Logs:  
[2026-07-10T14:22:44.251Z] DNS lookup: api3.cursor.sh  
[2026-07-10T14:22:44.262Z] Error: getaddrinfo ENOTFOUND api3.cursor.sh

Agent Endpoint: Error: getaddrinfo ENOTFOUND agent.api5.cursor.sh  
Logs:  
[2026-07-10T14:22:44.251Z] DNS lookup: agent.api5.cursor.sh  
[2026-07-10T14:22:44.264Z] Error: getaddrinfo ENOTFOUND agent.api5.cursor.sh

Codebase Indexing: Error: getaddrinfo ENOTFOUND repo42.cursor.sh  
Logs:  
[2026-07-10T14:22:44.251Z] DNS lookup: repo42.cursor.sh  
[2026-07-10T14:22:44.263Z] Error: getaddrinfo ENOTFOUND repo42.cursor.sh

Downloads: Success  
Logs:  
[2026-07-10T14:22:44.251Z] Host: [downloads.cursor.com](http://downloads.cursor.com)  
[2026-07-10T14:22:44.616Z] Response: 403 in 365ms

CDN: Success  
Logs:  
[2026-07-10T14:22:44.251Z] Host: [cursor-cdn.com](http://cursor-cdn.com)  
[2026-07-10T14:22:44.577Z] Response: 404 in 326ms

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