Put 650+ A/B Tests Inside Your AI Assistant NEW
Connect the GoodUI MCP server to Claude or another AI assistant. Plan roadmaps, design stronger tests, and decide what to ship or iterate, based on what won, what lost, and your own custom meta-analyses.
Included with Team and Company-Wide plans. Already a member? Request your key.
What You Can Ask
Build A Testing Roadmap From Scratch
Turn the strongest evidence for your pages and metric into an ordered plan.
Reprioritize Your Existing Roadmap
Re-rank the ideas you already have by how often similar changes have won.
Get Your Top 10 Design Ideas For Any Screen
Share a screenshot or URL and get the highest-impact changes, ranked by evidence.
Raise The Odds Of Your Planned A/B Test
Check your treatment design against what has won and lost, before you build it.
Plan A Test Big Enough To Detect A Realistic Effect
Get the sample size, duration and MDE your test needs, based on the effects similar tests actually achieved.
Turn Finished Tests Into Next Steps
Get iteration ideas for a finished test, or find flat and losing tests worth another, better-powered try.
Combine Your Own A/B Test With GoodUI's Evidence To Know Whether To Ship Or Iterate NEW
Add your test's visitors and conversions to similar GoodUI tests. You gain statistical power from their combined sample, see whether your result holds up beyond your own site, and get a clear next step: ship, retest or iterate. Same method as our pattern pages and meta-analysis calculator.
| Example | Visitors | Effect | p-value |
|---|---|---|---|
| GoodUI evidence (3 tests) | 42,900 | +2.2% | 0.0001 |
| Your test | 376,000 | +0.8% | 0.0092 |
| Combined → Ship | 418,900 | +1.1% | < 0.0001 |
Illustrative figures.
Available On Team And Company-Wide Plans
How It Works
Get your key
Team and Company members request a personal key. We send it to you, usually within a business day.
Connect your AI tool
Add GoodUI as a connector in Claude, or in any AI tool that supports remote MCP servers. It takes about two minutes.
Ask in plain language
Your assistant searches patterns and tests, ranks results and runs meta-analyses for you.
Common Questions
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What is MCP?
MCP (Model Context Protocol) is an open standard that lets AI assistants use outside tools and data. With GoodUI's MCP server connected, your assistant can look up GoodUI patterns and A/B tests directly instead of guessing from what it learned in training.
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Which AI tools does it work with?
Claude (desktop and web) via a custom connector, and other AI tools that support remote MCP servers with an API key in a request header. We'll send setup steps with your key.
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Can I run my own meta-analysis?
Yes. Ask your assistant to combine any 2 or more GoodUI tests, for example all tests of a pattern on one metric, or just the ones that match your page and device. You can include your own results too: give your assistant the visitors and conversions for A and B, and they're combined with the GoodUI tests using the same inverse-variance method as our pattern pages. You get one combined effect and p-value, plus each test's effect and weight. Your own figures are only used for the calculation; we don't store them.
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Does GoodUI see my conversations?
No. We only receive the requests your assistant sends to GoodUI, such as a search term or a test number, never your prompts or the rest of the conversation. We log those requests to run the service and keep usage fair; see our Terms of Service.
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Are there usage limits?
MCP access is for your team's own research and experiment planning, under fair use. Normal use, even heavy use, is fine. Bulk downloading or copying the dataset isn't. Details are in our Terms of Service.
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Can we build GoodUI data into our own product or AI model?
Not with a membership. That needs a data license, which is available: talk to Jakub.