MCP client failed to start: invalid server name with space (Salesforce DX)
Resolved 💬 3 comments Opened Oct 24, 2025 by brandonpaldom Closed Oct 24, 2025
💡 Likely answer: A maintainer (gpeal, contributor)
responded on this thread — see the highlighted reply below.
What version of Codex is running?
codex-cli 0.47.0
What subscription do you have?
ChatGPT Plus
Which model were you using?
gpt-5-high
What platform is your computer?
Darwin 24.6.0 arm64 arm
What issue are you seeing?
When starting the MCP server with Codex CLI, I get the following error:
MCP client for 'Salesforce DX' failed to start: invalid server name 'Salesforce DX': must match pattern ^[a-zA-Z0-9_-]+$
My config:
model = "gpt-5"
model_reasoning_effort = "high"
[mcp_servers."Salesforce DX"]
command = "npx"
args = [
"-y", "@salesforce/mcp@latest",
"--orgs", "DEFAULT_TARGET_ORG",
"--toolsets", "orgs,metadata,data,users",
"--tools", "run_apex_test",
"--allow-non-ga-tolos"
]
Codex CLI: 0.47.0
MCP package: @salesforce/mcp
macOS Sequoia 15.7.1
Node/npm versión: v24.10.0
What steps can reproduce the bug?
cd ~/Development/dx-project
codex
What is the expected behavior?
<img width="1924" height="1104" alt="Image" src="https://github.com/user-attachments/assets/1381bfa8-f212-4aa2-b051-ae7a5eb3fb0b" />
Additional information
_No response_
3 Comments
Try naming it
salesforce_dxI've tried, but it doesn't work.
<img width="1924" height="1104" alt="Image" src="https://github.com/user-attachments/assets/b12d2499-b9bb-4c96-a616-bdf1de897a80" />
Increase your startup timeout. The error will make it more clear how to fix this in 0.49
https://github.com/openai/codex/blob/main/docs/config.md#other-configuration-options