Codex MCP Servers: Config, Transports, and What Works
MCP servers worth wiring into OpenAI Codex, by category — plus config.toml syntax, codex mcp add, stdio vs streamable HTTP, and what Codex drops.
OpenAI Codex
20 posts
How to Connect Codex to Bitbucket (and What It Can't Do)
Codex has no native Bitbucket support, but Atlassian's Rovo MCP server now covers Bitbucket Cloud. Here's how to wire it up and where it stops.
How to Connect Codex to CircleCI (and What It Can't Do)
Yes, CircleCI's official MCP server works with Codex — build logs, flaky tests, pipeline reruns in-session. But nobody's watching CI when you log off.
How to Connect Codex to Cloudflare (and What It Can't Do)
Yes, Codex connects to Cloudflare's official remote MCP servers — Workers, DNS, the full API — but it works in sessions, not as an always-on ops layer.
How to Connect Codex to Datadog (and What It Can't Do)
Yes, OpenAI Codex can connect to Datadog through Datadog's official MCP server — great for debugging sessions, but it won't watch your monitors overnight.
How to Connect Codex to GitLab (and What It Can't Do)
Codex has no native GitLab integration — but GitLab's official MCP server connects it in minutes. What works, what doesn't, and where the gaps are.
How to Connect Codex to Grafana (and What It Can't Do)
Yes, Grafana's official MCP server connects to Codex — dashboards, Prometheus, Loki, alert rules in-session. The overnight watching is a different tool.
How to Connect Codex to Postman (and What It Can't Do)
Yes, Postman's official MCP server lists Codex as a supported client: collections, specs, and environments in your session. Monitoring is another story.
How to Connect Codex to Sentry (and What It Can't Do)
Sentry ships an official MCP server that plugs straight into Codex — real stack traces in your debugging sessions. But Codex won't watch Sentry for you.
How to Connect Codex to Supabase (and What It Can't Do)
Supabase's official MCP server gives Codex 20+ tools — queries, migrations, Edge Functions, branches. Here's the setup and where the automation stops.
How to Connect Codex to Vercel (and What It Can't Do)
Vercel's official MCP server lists Codex CLI as a supported client — deployments, logs, and docs in your sessions. But Codex won't watch your deploys.
How to Connect Codex to GitHub (and What It Can't Do)
Yes, OpenAI Codex integrates natively with GitHub — cloud tasks, @codex on PRs, and code review — but it's a developer tool, not a no-code ops assistant.
How to Connect Codex to Jira (and What It Can't Do)
You can connect Jira to OpenAI Codex via the Atlassian MCP server so it reads tickets as context — but it's a developer config, not a no-code Jira assistant.
How to Connect Codex to Linear (and What It Can't Do)
You can connect Linear to OpenAI Codex via its MCP server so it reads issues as context — but it's a developer config, not a no-code Linear assistant.
How to Connect Codex to Notion (and What It Can't Do)
You can connect Notion to OpenAI Codex via an MCP server so it pulls docs as context — but it's a developer config, not a no-code Notion assistant.
How to Connect Codex to Google Calendar (and Its Limits)
You can wire OpenAI Codex to Google Calendar through an MCP server, but it's a developer setup and Codex is a coding agent, not a scheduler.
How to Connect Codex to Gmail (Plugin and MCP)
Yes, Codex connects to Gmail. The first-party plugin holds one Google account; connect every Gmail and Outlook mailbox to Carly and reach them in one session.
How to Connect Codex to Outlook Calendar (Plugin + MCP)
Codex has a first-party Outlook Calendar plugin that books and reschedules. Where free/busy runs out, and how Carly closes the loop on its own.
How to Connect Codex to Outlook (Plugin and MCP)
Codex has a first-party Outlook Email plugin. What it sends, the plain-text limit, and how one MCP server puts every Outlook and Gmail mailbox in reach.
How to Connect Codex to Slack (and What It Can't Do)
Codex reaches Slack two ways: an app that launches coding tasks and a plugin that summarizes channels. Neither one runs Slack for you.