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Rank, 14 days: 34 on the Codex sheet
37 people reported

All time, since Sep 23, including 9 thumbs-up on GitHub.

Plugin tools unavailable on Windows

“Observe that no Supabase tools are registered and codex_apps reports status=failed.”

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I hit this bug: rapsheet.dev/sheets/codex/themes/139/file
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Fading. 2 reports and thumbs-up in the last 7 days and 7 the week before, down from 10 a week at the late-September peak.

7 bugs in this theme

  1. codex_apps MCP decoding failureNo workaround yet18 people
  2. Cloudflare plugin becomes unavailable after successful OAuth5 people
  3. Connected app tools not callableNo workaround yet4 people
  4. Plugin tools missing in LocalHas a workaround3 people
  5. Connected app tools vanishNo workaround yet3 people
  6. Sites publishing tools unavailableNo workaround yet2 people
  7. Gmail tools disappearNo workaround yet2 people

What's included

  • codex_apps MCP startup fails with "HTTP request failed: error decoding response body" on initialize or discover
  • Plugin tools appear in the tool inventory, then disappear or fail with "is not a function" / "is not available to the model"
  • Same connectors (Gmail, Outlook, Google Drive, Figma, Sites, Supabase and others) work in ChatGPT Chat, on the web or in Work Cloud but not in Codex or Work Local
  • Plugin shows Connected and enabled; reconnecting, reinstalling and restarting do not restore tools
  • Began after a desktop or engine update for some users

Not included

  • Authentication or permission errors returned by the connected service itself
  • MCP failures on macOS or Linux
  • /feedback "Couldn't verify feedback permissions" on its own

Original reports30, newest first

  1. Windows MCP connector fails decoding HTTP responses; Linear works with HTTP/2 and bodyless 202 workaroundOn GitHub#58779
  2. The Notion MCP does not work in Codex 01a18a3a-2805-74f0-93e9-98ecc71a23b3On GitHub#58200
  3. Title: Google Drive plugin connected in Codex desktop app, but Codex says no Google Drive tool is availableOn the forum#1410785
  4. Codex Apps MCP intermittently fails to initialise — Gmail tools unavailableOn GitHub#57137
  5. Windows desktop: enabled Ahrefs and DataForSEO unavailable after codex_apps MCP response decoding failureOn GitHub#54733
  6. Windows: codex_apps discovery fails decoding HTTP response; advertised plugin tools unavailable at executionOn GitHub#54645
  7. Connected Gmail and Outlook tools disappear before execution in Codex desktopOn GitHub#54582
  8. [Windows] Codex App fails MCP discovery while the same connector works in ChatGPT Web and DesktopOn GitHub#54362
  9. Gmail tools become unavailable in Codex Windows desktop despite Connected statusOn GitHub#53962
  10. Windows: Cloudflare plugin disappears after successful OAuth and live MCP calls; reconnect opens duplicate authorization tabsOn GitHub#53854
Show all 30Show only the newest 10
  1. Sites publishing tools unavailable after opening existing Site in CodexOn GitHub#53792
  2. Windows Work: Gmail and IBKR tools unavailable in local tasks while cloud reads succeedOn GitHub#53233
  3. Windows desktop: codex_apps MCP discovery fails with "error decoding response body", removing Sites toolsOn GitHub#53169
  4. [Windows] Any external plugin works in Chat but fails to initialize in ChatGPT Work or Codex in desktopOn GitHub#51416
  5. Windows 0.160.1: codex_apps MCP initialization fails with “error decoding response body”On GitHub#51370
  6. Google Calendar works in regular ChatGPT chat but fails in desktop Work conversations on WindowsOn GitHub#51124
  7. codex_apps initialization fails with “error decoding response body” on Windows — 0.160.0 and 0.155.1On GitHub#50469
  8. Gmail tools unavailable in Windows Work/Codex; /feedback permission check also failsOn GitHub#50028
  9. Windows 11, Codex CLI 0.157.1. The built-in codex_apps MCP fails at startup with HTTP request failed:On GitHub#48835
  10. Render plugin unavailable: MCP initialization fails; feedback permission check also failsOn GitHub#48709
  11. Managed codex_apps MCP bridge fails initialization and removes Figma tools from Codex DesktopOn GitHub#48642
  12. [Windows] MCP HTTP responses fail with "error decoding response body"; app connectors unavailableOn GitHub#48504
  13. Connected plugin tools unavailable in ChatGPT desktop Work Local, but work in CloudOn GitHub#48210
  14. Connected plugin tools unavailable in ChatGPT desktop Work Local, but work in CloudOn GitHub#48209
  15. Outlook Email and Calendar connector startup failureOn GitHub#48177
  16. Windows desktop: Gmail catalogue tools have undefined runtime bindings after reported codex_apps initialization failureOn GitHub#48154
  17. Windows: codex_apps initialization fails after bundled engine update to 0.155.0-alpha.16.4On GitHub#48082
  18. Windows: Outlook tools appear in discovery but fail with “is not a function”On GitHub#47875
  19. Codex connected apps are installed but their callable tools are not exposed to the runtimeOn GitHub#47839
  20. codex_apps MCP fails to initialize on Windows: response decoding error and Cloudflare 403 challengeOn GitHub#47468

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