MCP bugs are systematically ignored - this is crazy

[CaliLuke]

There's a long list of extremely serious and show stopping bugs in the MCP stack related to both oauth and tool discovery that have been around for weeks. Not being able to connect and use MCP reliably is a serious production issue and I'm frankly shocked that the team seems to be paying no attention whatsoever to the problem. Even the official Linear plugin is affected!

What is going on? Are plugins and MCP connectivity not important for the OpenAI team?

[microHoffman]

Yes I agree, some of the issues has been there for a long time. If coding is solved, then solving these bugs shouldn't be that big issue. Or maybe coding is not solved after all? Anyway yeah fix these soon please.

[tracework-ai]

I can independently confirm a related MCP tool-discovery regression. In my testing, Codex discovered a healthy stdio MCP server and its resources, but its registered tools were unavailable with GPT-5.6 Sol. The same tool worked through a standalone MCP client, with GPT-5.4, and with Sol after disabling Responses Lite. I reproduced this across several Codex versions.
This materially blocks MCP-based workflows and can be difficult to diagnose because the server appears connected while its tools remain inaccessible.
I cannot confirm the OAuth issues or comment on the team’s priorities, but I’m adding this independent data point because reliable MCP connectivity and tool discovery are important. It would be helpful to know whether these reports share a root cause and whether there is a recommended workaround while they are being investigated.
I documented my reproduction and A/B results here: #33679

[mwest1066]

I'm also seeing persistent MCP auth/connection issues which are severely impacting my ability to use Codex. For example, both Ashby (Applicant Tracking System) and Zoho (CRM system) are failing. These work in Claude and the issue for Codex appears to be issuer validation handling (#31573). These bugs are much more important than the current UI work in Codex for me.

[zsxlkn]

"I started learning to use Codex yesterday, but I found that even though Context7 and MCP are all set up, Codex keeps searching the web over and over and won't proactively call the MCP server. It only calls codex.list_mcp_resources when I explicitly prompt it to. Claude Code, on the other hand, always gets it right on the first try and calls MCP immediately."