MCP server

LiveVariant Official

io.github.livevariant/livevariant

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Build, inspect and read adaptive A/B tests. Config travels in the URL; no account or API key needed.

Website Source

At a glance

Type

MCP server

Publisher

livevariant.com (verified by the MCP Registry)

Status

Working at last check

Tools

9

Token cost

About 4,927 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

{"mcpServers":{"livevariant":{"httpUrl":"https://livevariant.com/mcp"}}}

Cursor

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

VS Code

{"servers":{"livevariant":{"type":"http","url":"https://livevariant.com/mcp"}}}

Antigravity

agy mcp add livevariant https://livevariant.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"livevariant","server_url":"https://livevariant.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"livevariant","server_url":"https://livevariant.com/mcp"}

Tools

• build_test ~1865 tokens
  Creates a LiveVariant test and returns every URL needed to run it, plus a freshly generated stats secret. Pass `variants` to test one element, or `slots` to test several at once (hero image AND call-to-action, say). With slots the test optimizes the COMBINATION: one model learns how the elements in
• generate_priors ~756 tokens
  Takes YOUR estimate of how each variant will perform and converts it into the prior the model starts from, so a test does not spend its first visitors rediscovering what you already suspect. You supply the guess; this does the arithmetic and the capping. That capping is the point: a prior is expres
• get_stats ~384 tokens
  Fetches a test's results and works out what they mean. Alongside the raw counts it returns the probability that each combination is genuinely best and the expected cost of stopping now and keeping the leader. Use those rather than comparing conversion rates by eye: a variant ahead 2/10 to 1/10 look
• get_test_status ~405 tokens
  Reports what the deployment's registry knows about a test: whether it is claimed into an account (and by which organization), and whether each redirect destination is a verified domain. Unverified destinations work, but visitors see a 'Redirecting you to…' continue screen first. When you see verifi
• inspect_test ~261 tokens
  Decodes a test and describes it: slots, variants, context, and whether it can be served by redirect. Also lints it for the mistakes that only show up once a campaign is out, such as an email test whose context comes from geo (which a mail proxy answers about itself). Use this before sending anythin
• list_tests ~222 tokens
  Lists tests registered to the signed-in account, newest first, with cursor pagination and an optional case-insensitive name filter. Only exists on deployments with accounts, and only answers for an identified caller: unlike every other tool, WHOSE tests these are cannot be expressed as an argument.
• register_test ~386 tokens
  Registers a test you built earlier to the organization a publishable key belongs to, so it shows under My tests and its stats are readable from the dashboard without the secret. Use this only when the user provides both the test's stats secret and a publishable key for an organization they administ
• upload_image ~343 tokens
  Uploads an image to the deployment's asset store and returns its URL, for use as a variant's `image` (email tests) or `url`. The returned URL is deliberately not fetchable on its own: assets are only served with a short-lived signature that the serve endpoints mint per request, so uploading here do
• variant_brief ~305 tokens
  Returns the constraints to write or generate test variants against, for email or web, plus the rules that decide whether a test can be read at all once it runs. The one that matters most: one idea per slot. To vary two elements, give the test two slots and let it learn the combination, rather than

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