MCP client for `codex_apps` failed to start
Resolved 💬 5 comments Opened Jun 8, 2026 by kswnia Closed Jun 9, 2026
What version of Codex CLI is running?
codex-cli 0.136.0
What subscription do you have?
plus
Which model were you using?
default didnt changed anything
What platform is your computer?
Microsoft Windows NT 10.0.26100.0 x64
What terminal emulator and version are you using (if applicable)?
in vscode and native wsl from terminal
Codex doctor report
{
"schemaVersion": 1,
"generatedAt": "1780927495s since unix epoch",
"overallStatus": "fail",
"codexVersion": "0.136.0",
"checks": {
"app_server.status": {
"id": "app_server.status",
"category": "app-server",
"status": "ok",
"summary": "background server is not running",
"details": {
"control socket": "/home/ksenia/.codex/app-server-control/app-server-control.sock",
"daemon state dir": "/home/ksenia/.codex/app-server-daemon",
"mode": "ephemeral",
"pid file": "/home/ksenia/.codex/app-server-daemon/app-server.pid (missing)",
"settings": "/home/ksenia/.codex/app-server-daemon/settings.json (missing)",
"status": "not running",
"update-loop pid file": "/home/ksenia/.codex/app-server-daemon/app-server-updater.pid (missing)"
},
"remediation": null,
"durationMs": 0
},
"auth.credentials": {
"id": "auth.credentials",
"category": "auth",
"status": "ok",
"summary": "auth is configured",
"details": {
"auth file": "/home/ksenia/.codex/auth.json",
"auth storage mode": "File",
"stored API key": "false",
"stored ChatGPT tokens": "true",
"stored agent identity": "false",
"stored auth mode": "chatgpt"
},
"remediation": null,
"durationMs": 0
},
"config.load": {
"id": "config.load",
"category": "config",
"status": "ok",
"summary": "config loaded",
"details": {
"CODEX_HOME": "/home/ksenia/.codex",
"config.toml": "/home/ksenia/.codex/config.toml",
"config.toml parse": "ok",
"cwd": "/home/ksenia",
"enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_suggest, plugins, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, image_generation, skill_mcp_dependency_install, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, workspace_dependencies",
"feature flag overrides": "none",
"feature flags enabled": "27",
"log dir": "/home/ksenia/.codex/log",
"mcp servers": "0",
"model": "gpt-5.5",
"model provider": "openai",
"sqlite home": "/home/ksenia/.codex"
},
"remediation": null,
"durationMs": 0
},
"git.environment": {
"id": "git.environment",
"category": "git",
"status": "ok",
"summary": "git version 2.34.1",
"details": {
"PATH git #1": "/usr/bin/git",
"PATH git #2": "/bin/git",
"PATH git entries": "2",
"git build options": "git version 2.34.1; cpu: x86_64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh",
"git exec path": "/usr/lib/git-core",
"git version": "git version 2.34.1",
"repo detected": "false",
"selected git": "/usr/bin/git"
},
"remediation": null,
"durationMs": 244
},
"installation": {
"id": "installation",
"category": "install",
"status": "ok",
"summary": "installation looks consistent",
"details": {
"PATH codex #1": "/home/ksenia/.nvm/versions/node/v22.12.0/bin/codex",
"PATH codex #2": "/mnt/c/nvm4w/nodejs/codex",
"PATH codex #3": "/mnt/c/nvm4w/nodejs/codex",
"PATH codex entries": "3",
"current executable": "/home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin/codex",
"install context": "npm (package /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl, bin /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin, resources /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-resources, path /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path)",
"managed by bun": "false",
"managed by npm": "true",
"managed package root": "/home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex",
"npm update target": "/home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex"
},
"remediation": null,
"durationMs": 325
},
"mcp.config": {
"id": "mcp.config",
"category": "mcp",
"status": "ok",
"summary": "no MCP servers configured",
"details": {},
"remediation": null,
"durationMs": 0
},
"network.env": {
"id": "network.env",
"category": "network",
"status": "ok",
"summary": "network-related environment looks readable",
"details": {
"proxy env vars": "none"
},
"remediation": null,
"durationMs": 0
},
"network.provider_reachability": {
"id": "network.provider_reachability",
"category": "reachability",
"status": "fail",
"summary": "one or more required provider endpoints are unreachable over HTTP",
"details": {
"ChatGPT base URL": "https://chatgpt.com/backend-api/ request timed out (required)",
"reachability mode": "ChatGPT auth"
},
"remediation": "Check proxy, VPN, firewall, DNS, and custom CA configuration.",
"durationMs": 3055
},
"network.websocket_reachability": {
"id": "network.websocket_reachability",
"category": "websocket",
"status": "warning",
"summary": "Responses WebSocket failed; HTTPS fallback may still work",
"details": {
"DNS": "2 IPv4, 2 IPv6, first IPv4",
"auth mode": "chatgpt",
"connect timeout": "15000 ms",
"endpoint": "wss://chatgpt.com/backend-api/<redacted>",
"handshake transport error": "network error: Network unreachable (os error 101)",
"model provider": "openai",
"provider name": "OpenAI",
"proxy env vars": "none",
"supports websockets": "true",
"wire API": "responses"
},
"remediation": "Check proxy, VPN, firewall, DNS, custom CA, and WebSocket policy support.",
"durationMs": 6375
},
"runtime.provenance": {
"id": "runtime.provenance",
"category": "runtime",
"status": "ok",
"summary": "running npm on linux-x86_64",
"details": {
"commit": "unknown",
"current executable": "/home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin/codex",
"install method": "npm (package /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl, bin /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/bin, resources /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-resources, path /home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path)",
"platform": "linux-x86_64",
"version": "0.136.0"
},
"remediation": null,
"durationMs": 0
},
"runtime.search": {
"id": "runtime.search",
"category": "search",
"status": "ok",
"summary": "search is OK (bundled)",
"details": {
"search command": "/home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path/rg",
"search command readiness": "file exists",
"search provider": "bundled"
},
"remediation": null,
"durationMs": 0
},
"sandbox.helpers": {
"id": "sandbox.helpers",
"category": "sandbox",
"status": "ok",
"summary": "sandbox configuration is readable",
"details": {
"approval policy": "OnRequest",
"codex-linux-sandbox helper": "/home/ksenia/.codex/tmp/arg0/codex-arg0FgV7NB/codex-linux-sandbox",
"execve wrapper helper": "/home/ksenia/.codex/tmp/arg0/codex-arg0FgV7NB/codex-execve-wrapper",
"filesystem sandbox": "restricted",
"network sandbox": "restricted"
},
"remediation": null,
"durationMs": 0
},
"state.paths": {
"id": "state.paths",
"category": "state",
"status": "ok",
"summary": "state paths and databases are inspectable",
"details": {
"CODEX_HOME": "/home/ksenia/.codex (dir)",
"active rollout files": "236 files, 112193438 total bytes, 475395 average bytes",
"archived rollout files": "0 files, 0 total bytes, 0 average bytes",
"goals DB": "/home/ksenia/.codex/goals_1.sqlite (file)",
"goals DB integrity": "ok",
"log DB": "/home/ksenia/.codex/logs_2.sqlite (file)",
"log DB integrity": "ok",
"log dir": "/home/ksenia/.codex/log (dir)",
"memories DB": "/home/ksenia/.codex/memories_1.sqlite (file)",
"memories DB integrity": "ok",
"sqlite home": "/home/ksenia/.codex (dir)",
"state DB": "/home/ksenia/.codex/state_5.sqlite (file)",
"state DB integrity": "ok"
},
"remediation": null,
"durationMs": 4738
},
"state.rollout_db_parity": {
"id": "state.rollout_db_parity",
"category": "threads",
"status": "ok",
"summary": "rollout files and state DB thread inventory agree",
"details": {
"default model provider": "openai",
"rollout DB active files": "236",
"rollout DB active rows": "236",
"rollout DB archive mismatches": "0",
"rollout DB archived files": "0",
"rollout DB archived rows": "0",
"rollout DB duplicate DB paths": "0",
"rollout DB duplicate rollout thread ids": "0",
"rollout DB malformed file names": "0",
"rollout DB missing active rows": "0",
"rollout DB missing archived rows": "0",
"rollout DB model providers": "openai=236",
"rollout DB rows": "236",
"rollout DB scan cap reached": "false",
"rollout DB scan errors": "0",
"rollout DB sources": "cli=230, exec=5, subagent:review=1",
"rollout DB stale rows": "0"
},
"remediation": null,
"durationMs": 1484
},
"system.environment": {
"id": "system.environment",
"category": "system",
"status": "ok",
"summary": "OS language C",
"details": {
"LANG": "C.UTF-8",
"os": "Ubuntu 22.4.0 (jammy) [64-bit]",
"os language": "C",
"os type": "Ubuntu",
"os version": "22.4.0"
},
"remediation": null,
"durationMs": 81
},
"terminal.env": {
"id": "terminal.env",
"category": "terminal",
"status": "ok",
"summary": "terminal metadata was detected",
"details": {
"DISPLAY": "present",
"WAYLAND_DISPLAY": "present",
"WSL_DISTRO_NAME": "present",
"WSL_INTEROP": "present",
"WT_SESSION": "present",
"color output": "enabled",
"effective locale": "C.UTF-8",
"stderr is terminal": "true",
"stdin is terminal": "true",
"stdout is terminal": "true",
"terminal": "Windows Terminal",
"terminal size": "134x33"
},
"remediation": null,
"durationMs": 0
},
"terminal.title": {
"id": "terminal.title",
"category": "title",
"status": "ok",
"summary": "terminal title default",
"details": {
"terminal title activity": "true",
"terminal title items": "activity, project-name",
"terminal title project source": "cwd",
"terminal title project value": "ksenia",
"terminal title source": "default"
},
"remediation": null,
"durationMs": 0
},
"updates.status": {
"id": "updates.status",
"category": "updates",
"status": "warning",
"summary": "update configuration is locally consistent",
"details": {
"cached latest version": "0.137.0",
"check for update on startup": "true",
"dismissed version": "0.137.0",
"last checked at": "2026-06-05T11:27:22.762452150Z",
"latest version probe": "curl: (7) Failed to connect to api.github.com port 443 after 3079 ms: No route to host",
"npm update target": "/home/ksenia/.nvm/versions/node/v22.12.0/lib/node_modules/@openai/codex",
"update action": "npm install -g @openai/codex",
"version cache": "/home/ksenia/.codex/version.json"
},
"remediation": null,
"durationMs": 3238
}
}
}What issue are you seeing?
<img width="1917" height="682" alt="Image" src="https://github.com/user-attachments/assets/39208f11-a1ca-4f48-9b5f-e62e7845b39f" />
ive updated codex version,but issue persist for 4 days right now and cannot reach out to url from chatgpt from curl -
<img width="1831" height="632" alt="Image" src="https://github.com/user-attachments/assets/add1fbdd-b796-4f23-bb6e-89114146de87" /> --
<img width="1211" height="343" alt="Image" src="https://github.com/user-attachments/assets/fc499be1-8e83-4d3e-9c6f-676374e901c1" /> -- Codex CLI starts, but built-in MCP client codex_apps fails.
curl can reach:
https://chatgpt.com/backend-api/wham/apps
HEAD returns Method Not Allowed/Forbidden, so network route is reachable.
Codex error:
MCP client for codex_apps failed to start:
MCP startup failed: handshaking with MCP server failed
HTTP request failed for url https://chatgpt.com/backend-api/wham/apps
when send initialize request
I cannot use /feedback because the agent is interrupted by this MCP failure.
What steps can reproduce the bug?
Uploaded thread: 019ea1c8-e873-70c3-9398-bd3bd4523b89 --
What is the expected behavior?
codex mcp client starts and i can message to codex agent
Additional information
_No response_
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