codex_apps MCP decoding failure

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

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/codex/issues/14247/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Fading. 2 reports and thumbs-up in the last 7 days and 4 the week before.

codex_apps MCP startup fails decoding response body, connector tools missing. Installed and enabled app connectors expose no tools in new chats; logs show "HTTP request failed: error decoding response body, when send discover request".

Is this your bug?

File my report

Where: codex_apps MCP server
Error text: HTTP request failed: error decoding response body, when send discover requestPasted in 2 reports
HTTP request failed: error decoding response body, when send initialize requestPasted in 3 reports
Versions: 0.156.1 to 26.1013.3656.0
Platforms: Windows
How bad: Breaks a normal workflow.

Part of: Plugin tools unavailable on Windows7 bugs

Connected app tools not callable4 people
Plugin tools missing in Local3 people
Sites publishing tools unavailable2 people
Gmail tools disappear2 people
Connected app tools vanish3 people
Cloudflare plugin becomes unavailable after successful OAuth5 people

Not quite your bug?

MCP tools missing in tasks13 people
Invalid codex_app MCP transport3 people

Original reports16, newest first

Nov 1, 2026Windows MCP connector fails decoding HTTP responses; Linear works with HTTP/2 and bodyless 202 workaroundOn GitHub#58779
Oct 29, 2026The Notion MCP does not work in Codex 01a18a3a-2805-74f0-93e9-98ecc71a23b3On GitHub#58200
Oct 26, 2026Codex Apps MCP intermittently fails to initialise — Gmail tools unavailableOn GitHub#57137
Oct 16, 2026Windows desktop: enabled Ahrefs and DataForSEO unavailable after codex_apps MCP response decoding failureOn GitHub#54733
Oct 16, 2026Windows: codex_apps discovery fails decoding HTTP response; advertised plugin tools unavailable at executionOn GitHub#54645
Oct 15, 2026[Windows] Codex App fails MCP discovery while the same connector works in ChatGPT Web and DesktopOn GitHub#54362
Oct 6, 2026[Windows] Any external plugin works in Chat but fails to initialize in ChatGPT Work or Codex in desktopOn GitHub#51416
Oct 6, 2026Windows 0.160.1: codex_apps MCP initialization fails with “error decoding response body”On GitHub#51370
Oct 5, 2026Google Calendar works in regular ChatGPT chat but fails in desktop Work conversations on WindowsOn GitHub#51124
Oct 2, 2026codex_apps initialization fails with “error decoding response body” on Windows — 0.160.0 and 0.155.1On GitHub#50469

Show all 16Show only the newest 10

Sep 27, 2026Windows 11, Codex CLI 0.157.1. The built-in codex_apps MCP fails at startup with HTTP request failed:On GitHub#48835
Sep 27, 2026Render plugin unavailable: MCP initialization fails; feedback permission check also failsOn GitHub#48709
Sep 27, 2026Managed codex_apps MCP bridge fails initialization and removes Figma tools from Codex DesktopOn GitHub#48642
Sep 26, 2026[Windows] MCP HTTP responses fail with "error decoding response body"; app connectors unavailableOn GitHub#48504
Sep 25, 2026Outlook Email and Calendar connector startup failureOn GitHub#48177
Sep 23, 2026codex_apps MCP fails to initialize on Windows: response decoding error and Cloudflare 403 challengeOn GitHub#47468