Live Variant MCP Server

The test that keeps testing. Open-source A/B testing that never stops. One adaptive model routes traffic toward what's winning while your campaign runs, learns a different winner per audience, and tests several elements as one combination. The whole test lives in a URL: no account, no platform, nothing to install on your site.

People who work with ab testing, cloudflare workers and experimentation and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-17 · ★ 2 · #51 OF 153 MAINTAINED CLOUD INFRASTRUCTURE · VERIFIED 2026-09-18

AGPL-3.0 · TypeScript servers · how we verify → /methodology

01 · Install Live Variant

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add livevariant-livevariant --transport http https://livevariant.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "livevariant-livevariant": {
      "url": "https://livevariant.com/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://livevariant.com/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-18

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to livevariant.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

repo age created 2026-08-02 - young repo, little track record yet

license AGPL-3.0 - declared in the repository

npm package @livevariant/mcp - published under the repo owner's npm scope (@livevariant)

registry namespace io.github.livevariant is GitHub-verified and matches the repo owner

03 · Who maintains Live Variant

LiveVariant is maintained by livevariant. It's the only MCP server we track from this author; the repo dates to Aug 2026.

04 · Facts

repository: github.com/livevariant/livevariant
website: https://livevariant.com/
category: cloud infrastructure - ranked #51 of 153 actively-maintained cloud infrastructure servers as of 2026-09-18.
registry: io.github.livevariant/livevariant (active, first published 2026-08-24 · 4 versions)
packages: npm:@livevariant/mcp

05 · Live Variant FAQ

What is Live Variant?

Is Live Variant still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-17. We re-verify nightly.

How do I install Live Variant?

Run `npx -y @livevariant/mcp`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Live Variant require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-18; you can connect without credentials.

06 · Alternatives to Live Variant

Alternatives to Live Variant

Maintained cloud infrastructure servers if Live Variant isn't the fit.

Pairs well with

Servers that cover what Live Variant doesn't - only shown when the pairing reason fits the companion.

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