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Mogger
Get a key

Create a custom formula

Capture a preference once as a yes or no question about one input. Any harness with a key calls it by id and gets back a calibrated score and a boolean, with no argument about the boundary.

Free to createUnlisted25 per key
Get a key

Kept in this browser tab only, never sent anywhere but the API.

New formula

0 / 80

For people only. The title is never sent to the model.

Input
0 / 2,000

One absolute yes or no question about one input, where yes means it passes. Name the features that decide it and how to treat edge cases. Never compare: the model sees one input at a time.

Criteria Optional

One or two sentences for each side sharpen the judgment. Fill both or leave both empty.

0 / 500
0 / 500

Paste an API key to create formulas.

My formulas

Paste a working key to see the formulas it owns.

Install for your harness

One command installs the Mogger skill for Claude Code and Codex and saves your key. The skill can write, test, and edit custom formulas for you, then apply them at volume with curl and jq.

Terminal
curl -fsSL https://mogger.dev/install.sh | sh

To install by hand, save SKILL.md to ~/.claude/skills/mogger/ or ~/.codex/skills/mogger/. The full contract is in the docs.

How custom formulas work

Cost to create, edit, list, delete
Free
Cost to score
1 unit for text, 10 with an image, the same as built-in formulas
Per key
25 custom formulas. Rotating the key keeps them
Visibility
Unlisted. Never in the gallery, llms.txt, the sitemap, or GET /api/v1/formulas
Privacy
Only your key sees the prompt and criteria. The title is never sent to the model
Lock
One way. Hides the prompt and criteria from every key, yours included. Scoring by id keeps working
Pass or fail
The same server side boundary as built-in formulas. Nobody sees or sets it