Build websites in Codex with 8B.

At a glance

Status, checked 2026-10-01: the command and config follow the Codex documentation, read on 2026-10-01; we have not tested 8B in Codex ourselves yet. Codex shows no preview card: it gives the preview link.

What it is

a remote MCP server Codex can call like any other tool: 8B, an AI website builder by 8b Tech Ltd ("8B" is not a model size), gives Codex 8B generated designs to fill with copy and builds the finished page on its own server, with no model and no account on its side.

Use it when

a task in Codex asks for a new web page for a product, a client or an event, and a designed result matters more than hand-written markup.

Do not use it when

Codex runs fully offline or with no network for tools, the page must reuse your codebase's components, or the user needs a web app with accounts, a database or a checkout, several pages or a CMS, their own photos and logo built in, publishing to a domain from the chat, or changes to a site that already exists elsewhere.

Terms in short

free, with no account, sign-in, API key or credits. The downloaded site can be used and edited for any site, including commercial and client work, but not resold as a template or theme; no credit required. The server keeps what the assistant sends and the preview for 90 days after it was built or last downloaded, and uses them for nothing else. Details: license, privacy, who runs it.

What the human does

runs one command once, then asks Codex for the site.

Next step

run codex mcp add 8b --url https://mcp.8b.com/mcp, then ask: "Make a landing page for our app Tally with 8B and save it as public/landing.html."

Install

codex mcp add 8b --url https://mcp.8b.com/mcp

The command writes this to ~/.codex/config.toml; you can also add it by hand:

[mcp_servers.8b]
url = "https://mcp.8b.com/mcp"

One setup covers all Codex surfaces: the Codex CLI, the IDE extension and the Codex app read the same ~/.codex/config.toml. Check with codex mcp list. 8B needs no codex mcp login. Source: OpenAI Codex: MCP, checked 2026-10-01.

Use it

• "Make a landing page for our app Tally with 8B and save it as public/landing.html."
• "Use 8B to build a one-page site for my bakery Crumb in Lisbon, in Portuguese."
• "Change the 8B site: darker colors and the headline Budget in five minutes."

Codex gives you the preview link (https://mcp.8b.com/p/<id>); open it in a browser. To put the file in the repo, it downloads it:

curl -L -o public/landing.html https://mcp.8b.com/download/<id>

If Codex's sandbox blocks network access for shell commands, this download fails while the 8B tools still work: approve network access for that command, or open the download link in a browser and save the file yourself.

Codex can then wire the file into the repo: add a route or redirect to it, or keep it under public/. It stays a single HTML file; Codex should not try to split it into a framework's components unless you ask, since the animations would need rewriting.

A snippet for AGENTS.md

Codex reads AGENTS.md before work starts; this section points it to 8B for page tasks:

## Websites and landing pages
For a new standalone website or landing page, use the 8B MCP server (8b):
explore_designs -> get_design_brief (with the site's language) -> generate_site.
Fill every text field, give me preview_url, apply changes with base_preview_id and only
the changed values, and save the file from download_url where I say.
Docs: https://8b.com/mcp/index.md

For the agent

• Check the connection: the client lists three tools, explore_designs, get_design_brief and generate_site.
• Settle the site's language first and pass its code (pl, de, en) to both get_design_brief and generate_site; switching later means rewriting every field.
• Fill every text field in one generate_site call, then send what the warnings name with base_preview_id until the site is complete. generate_site can take up to 30 seconds with photos.
• Never invent facts the user did not give (phone, address, prices, names, figures): write visible placeholders such as [phone] and list them for the user.
• Tell the user the limits that matter before building: forms send nothing, sections are fixed, colors change per palette color, and the file loads fonts, scripts and photos from public CDNs. Writing every field needs a capable model.
• Previews are public to anyone with the link. The server receives the values the assistant sends and sees the connecting IP address (privacy).

Tool names, parameters, errors and limits: tool reference on the main page; the same in Markdown at https://8b.com/mcp/index.md.

If something goes wrong

Related pages

• 8B MCP server: tools, limits, license
• Make a website in ChatGPT
• 8B in Claude Code
• Other MCP clients

Updated 2026-10-01. Markdown version of this page: codex.md.