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OpenAI Codex CLI reads MCP servers from ~/.codex/config.toml. Create an API key under Developer → API Keys in intervyo first.
Your API key carries your account’s permissions. Treat it like a password and scope it to only what the assistant needs.
Recent versions connect to streamable-HTTP servers directly:
[mcp_servers.intervyo]
url = "https://www.intervyo.ai/api/mcp"
http_headers = { "x-api-key" = "iv_live_your_key" }
Restart Codex, then run /mcp (or ask “what tools do you have?”) to confirm intervyo loaded.

Give the assistant expertise

Add the Interview-Setup Skill

The MCP server gives Codex the tools; the Skill teaches it how to use them — what to ask, the build order, and the field rules that trip people up. Codex reads a SKILL.md the same way Claude does. Strongly recommended.
Last modified on July 10, 2026