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session starts up with an inscrutable MCP nastygram #18769

@RichMorin

Description

@RichMorin

What version of Codex CLI is running?

v0.122.0

What subscription do you have?

Plus

Which model were you using?

gpt-5.3-codex medium

What platform is your computer?

Darwin 24.5.0 arm64 arm

What terminal emulator and version are you using (if applicable)?

No response

What issue are you seeing?

MCP client for codex_apps failed to start: MCP startup failed: handshaking
with MCP server failed: Send message error Transport
[rmcp::transport::worker::WorkerTransport<rmcp::transport::streamable_http_cli
ent::StreamableHttpClientWorker<codex_rmcp_client::rmcp_client::StreamableHttp
ResponseClient>>] error: Unexpected content type: Some("text/plain; body: {\n
"error": {\n "message": "Provided authentication token is expired.
Please try signing in again.",\n "type": null,\n "code":
"token_expired",\n "param": null\n },\n "status": 401\n}"), when
send initialize request

⚠ MCP startup incomplete (failed: codex_apps)

• Feedback uploaded. Please open an issue using the following URL:

https://github.com/openai/codex/issues/new?template=3-cli.yml&steps=Uploaded%20thread:%20019dad42-354a-76a0-8c82-b59d41085fb9

Or mention your thread ID 019dad42-354a-76a0-8c82-b59d41085fb9 in an existing
issue.

› codex --version

■ Your access token could not be refreshed because your refresh token was
already used. Please log out and sign in again.

What steps can reproduce the bug?

Uploaded thread: 019dad42-354a-76a0-8c82-b59d41085fb9

What is the expected behavior?

No response

Additional information

No response

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    authIssues related to authentication and accountsbugSomething isn't workingmcpIssues related to the use of model context protocol (MCP) servers

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