Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Build, inspect and read adaptive A/B tests. Config travels in the URL; no account or API key needed.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
Pick the AI app you use, then copy the settings.
LIVEVARIANT_SERVER_URL, LIVEVARIANT_API_TOKEN, LIVEVARIANT_ASSET_UPLOAD_TOKENValues marked secret are keys to your account. Never share them or paste them into a chat.
You need
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
https://livevariant.com/mcpOpen Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"livevariant": {
"command": "npx",
"args": [
"-y",
"@livevariant/mcp"
],
"env": {
"LIVEVARIANT_SERVER_URL": "your-value",
"LIVEVARIANT_API_TOKEN": "your-value",
"LIVEVARIANT_ASSET_UPLOAD_TOKEN": "your-value"
}
}
}
}Run this in your terminal
claude mcp add --transport http livevariant https://livevariant.com/mcpclaude mcp add livevariant --env LIVEVARIANT_SERVER_URL=your-value --env LIVEVARIANT_API_TOKEN=your-value --env LIVEVARIANT_ASSET_UPLOAD_TOKEN=your-value -- npx -y @livevariant/mcpFill in the empty values before running it.
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"livevariant": {
"url": "https://livevariant.com/mcp"
}
}
}Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"livevariant": {
"command": "npx",
"args": [
"-y",
"@livevariant/mcp"
],
"env": {
"LIVEVARIANT_SERVER_URL": "your-value",
"LIVEVARIANT_API_TOKEN": "your-value",
"LIVEVARIANT_ASSET_UPLOAD_TOKEN": "your-value"
}
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Paste into .vscode/mcp.json in your project
{
"servers": {
"livevariant": {
"type": "http",
"url": "https://livevariant.com/mcp"
}
}
}Paste into .vscode/mcp.json in your project
{
"servers": {
"livevariant": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@livevariant/mcp"
],
"env": {
"LIVEVARIANT_SERVER_URL": "your-value",
"LIVEVARIANT_API_TOKEN": "your-value",
"LIVEVARIANT_ASSET_UPLOAD_TOKEN": "your-value"
}
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
https://livevariant.com/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
LIVEVARIANT_SERVER_URL envThese settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
We have not read this server’s tool list yet; we check endpoints in rotation.
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026
The registry name was verified with the GitHub account livevariant, which owns the repo
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
Not checked yet; we check endpoints in rotation
Not checked yet; we check endpoints in rotation
Not checked yet; we read the tool list when we check the endpoint
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
You need to fill in: LIVEVARIANT_API_TOKEN, LIVEVARIANT_ASSET_UPLOAD_TOKEN
Either way works: install it on your computer or connect to the cloud version.
The GitHub repo last changed –, and the latest version (0.1.5) reached the registry 2 months ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
In the same category: Spec Driven Development, Remote Desktop Commander, Symantec Cloud DLP AIops
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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
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Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
MCP server for LiveVariant: build, inspect and read adaptive A/B tests from Claude, ChatGPT, Copilot or any MCP client.
npx -y @livevariant/mcp
Set runtime environment variables before starting the MCP server when you point it at a self-hosted deployment:
LIVEVARIANT_SERVER_URL: the deployment origin to call.LIVEVARIANT_API_TOKEN: the deployment's LV_API_TOKEN, when /mcp or /api/v1/* is gated.LIVEVARIANT_ASSET_UPLOAD_TOKEN: the deployment's LV_ASSET_UPLOAD_TOKEN, when /assets is gated.The hosted endpoint at https://livevariant.com/mcp offers the same tools with nothing installed.
Part of livevariant/livevariant; the repository README covers the whole system. AGPL-3.0.