CLI
et login, et site add, et round start, et status.
AI generalists
A/B testing for AI generalists
For anyone who runs A/B tests on a landing page from Claude, Codex, or ChatGPT, through the CLI, MCP, or API.
$ et login --email
$ et site add
$ et round start
$ et status
decision: continue
curl -fsSL https://api.endlesstesting.ai/install.sh | sh et-x86_64-linux-musl, et-aarch64-linux-musl, et-x86_64-macos, et-aarch64-macos, and et-x86_64-windows. The script picks the file for this machine.
A round that is still running prints decision: continue and does not name a winner.
How it works
An endless loop. The winner stays live. The next round starts itself.
-
01
Sign in and add the site
et login signs you in. et site add adds the landing page.
-
02
Start a round
et round start opens the round.
-
03
The winner stays live
When the round ends, the winner stays live.
-
04
The next round starts itself
The next round starts itself. et status reports the round.
Connect your AI
CLI, MCP, and API are equal. Claude, Codex, and ChatGPT can use any of them.
MCP
The same actions from Claude, Codex, or ChatGPT.
API
The same actions over HTTP.
The product writes the challenger lines
You connect Claude, Codex, or ChatGPT. Endless Testing writes the next lines.
Dashboard
Results live in the dashboard. The kill switch stops a round.
Results
The dashboard shows the current round and its results.
Kill switch
The kill switch stops the round.
Pricing
7-day free trial. Card required. Cancel before the trial ends and you are not charged.
Endless Testing
$299
/mo
or $249/mo billed annually. Save $600/yr.
- 5 concurrent tests
- CLI, MCP, and API
- Dashboard with results and a kill switch
- Winner stays live. The next round starts itself.
- Invite your team
- 7-day free trial, card required
Billed via Stripe. Cancel in one click.
Open source CLI. Source-available backend.
The CLI, SDK, and dashboard are MIT-licensed. The backend is source-available under BSL 1.1, converting to MIT in 2030.