Sim MCP server for Codex
Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
How to install Sim in Codex
Its MCP server asks you to sign in to the service before its tools load.
Add it to Codex as an MCP server:
codex mcp add sim --url https://mcp.sim.ai/mcpCommand copied from the repo README (Codex's `codex mcp add` adds an MCP server to Codex). Check the README for any API key or setup it needs. Source: repo README.
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What it contains
Component list not published in a manifest we can read. See the repo README.
About this listing
Sim is a community connector on GitHub by simstudioai. Its README documents a Codex install and the repo documents a codex mcp add command. It passed the CodexStacks quality filter for repos found this way (at least 100 stars, pushed in the last 90 days, not a fork or a list). OpenAI hasn't reviewed it, but it passed our Codex install check on Oct 28, 2026 (an install and load check, not a code review). It's one of 441 listings in the Developer Tools category (category assigned by CodexStacks from the repo's topics and description). It also appears in best Codex plugins for deployment and hosting.
Sim FAQ
How do I install Sim in Codex?
Add it as an MCP server with codex mcp add sim --url https://mcp.sim.ai/mcp (copied from the repo README; check it for any API key or setup the server needs).
Is Sim an official Codex connector?
No. Sim is a community repo on GitHub by simstudioai. It passed the CodexStacks quality filter, but OpenAI hasn't reviewed it, but it passed our Codex install check on Oct 28, 2026 (an install and load check, not a code review), so read the code before you install it.
What does Sim include?
Component list not published in a manifest we can read. See the repo README.
Details
- Type
- Connector
- Category
- Developer Tools (assigned by us)
- Source
- Community
- Author
- simstudioai
- License
- Apache-2.0
- GitHub stars
- 29,934 (at last sync)
- Last push
- 2026-10-29
- GitHub topics
- agent-workflow, agentic-workflow, agents, ai, aiagents, anthropic, artificial-intelligence, automation, chatbot, deepseek, gemini, low-code
- Source
- https://github.com/simstudioai/sim
- Website
- https://www.sim.ai
- Listed via
- GitHub search: README documents a Codex install
- Install check by CodexStacks
- Passed on Oct 28, 2026 with Codex CLI 0.163.0: Codex added its MCP server; it asks you to sign in to the service before the tools load. proof · how we check
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For maintainers: badge and embeds
Maintain Sim? Add the badge; it links to this page.
Markdown
[](https://codexstacks.com/p/sim/)HTML
<a href="https://codexstacks.com/p/sim/"><img src="https://codexstacks.com/badge.svg" alt="Listed on CodexStacks" width="172" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://codexstacks.com/p/sim/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #3a2c26;border-radius:12px;background:#0d0b0a;color:#f3ece6;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#f3ece6">Sim</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#b5a9a1">Community Codex connector</span><span style="display:block;margin:0 0 10px;color:#ddd3cc">Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.</span><span style="font-size:12px;font-weight:600;color:#ffb347">View on CodexStacks →</span></a>Markdown summary
**[Sim on CodexStacks](https://codexstacks.com/p/sim/)**: Community Codex connector.More on badges, embeds and keeping your listing up to date: CodexStacks for plugin authors.
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