Cursor connection problem with agent.api5.cursor.sh

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1

Having exactly the same problem here today. Started suddenly and have been unable to use anything for hours.

Version: 2.3.41
VSCode Version: 1.105.1
Commit: 2ca326e0d1ce10956aea33d54c0e2d8c13c58a30
Date: 2026-01-16T19:14:00.150Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.6.0

[2026-01-20T09:57:49.351Z] Start
[2026-01-20T09:57:51.649Z] Host: api2.cursor.sh
[2026-01-20T09:57:51.649Z] Protocol: h2
[2026-01-20T09:57:51.649Z] Result: true in 2298ms

[2026-01-20T09:57:49.351Z] Start
[2026-01-20T09:57:51.939Z] URL: https://api2.cursor.sh/
[2026-01-20T09:57:51.939Z] Status: 200
[2026-01-20T09:57:51.939Z] IP: 184.73.249.78
[2026-01-20T09:57:51.939Z] Issuer: C=US; O=Amazon; CN=Amazon RSA 2048 M01
[2026-01-20T09:57:51.939Z] Name: api2.cursor.sh
[2026-01-20T09:57:51.939Z] AltName: DNS:api2.cursor.sh, DNS:prod.authentication.cursor.sh, DNS:*.api2.cursor.sh
[2026-01-20T09:57:51.939Z] DNS Time: 3ms
[2026-01-20T09:57:51.939Z] Connect Time: 2039ms
[2026-01-20T09:57:51.939Z] TLS Time: 266ms
[2026-01-20T09:57:51.939Z] Result: true in 2588ms

[2026-01-20T09:57:49.351Z] Start
[2026-01-20T09:57:49.577Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND agent.api5.cursor.sh

[2026-01-20T09:57:49.352Z] Sending ping 1
[2026-01-20T09:57:49.578Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND agent.api5.cursor.sh

[2026-01-20T09:57:49.352Z] Starting stream
[2026-01-20T09:57:49.578Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND agent.api5.cursor.sh

[2026-01-20T09:57:49.352Z] Starting stream
[2026-01-20T09:57:49.353Z] Pushing first message
[2026-01-20T09:57:49.578Z] Error: ConnectError: [unavailable] getaddrinfo ENOTFOUND agent.api5.cursor.sh

[2026-01-20T09:57:49.351Z] Host: marketplace.cursorapi.com
[2026-01-20T09:57:49.642Z] Response in 291ms
[2026-01-20T09:57:49.642Z] Response: 200
[2026-01-20T09:57:49.642Z] Response Type: cors
[2026-01-20T09:57:49.642Z] Server: null
[2026-01-20T09:57:49.642Z] Result: OK in 291m

Getaddrinfo ENOTFOUND agent.api5.cursor.sh [unavailable]
2

Hey, thanks for the report. The getaddrinfo ENOTFOUND agent.api5.cursor.sh error means there’s a DNS resolution issue. This is a known problem caused by a misconfigured SSL setup on the Cloudflare CDN.

Similar reports:

For now, please try:

  • Change your DNS to Cloudflare (1.1.1.1 / 1.0.0.1) or Quad9 (149.112.112.112) in your network settings. Google DNS 8.8.8.8 can route to an incorrect Cloudflare CDN IP.
  • Toggle your VPN on or off. In the Jan 8 thread, this fixed it for some users.
  • Try a different network, like a mobile hotspot.
  • In Cursor, go to Settings > Network and switch from HTTP/2 to HTTP/1.1 or HTTP/1.0.

Please keep an eye on updates in the linked thread.

3

Interestingly the issue went away after I disabled Apple’s Private Relay