---
type: "Article"
title: "NCS Checker: a Chrome extension that scores content the way AI search reads it"
description: "The build story of the free extension that runs the Non-Commodity Score on any page, and where the model is honestly weak, shown on our own articles."
resource: "https://www.laurelinlabs.com/blog/ncs-checker"
tags: ["ncs-checker", "topical-authority-content"]
generated: { by: "laurelin-site-build/2026-09-02", at: "2026-09-02T12:00:00+00:00" }
status: "stable"
stale_after: "2027-03-02T00:00:00+00:00"
---
# NCS Checker: a Chrome extension that scores content the way AI search reads it

Published 2026-08-29. Author: [Piers Butler](/entities/piers-butler.md).

NCS Checker is a free Chrome extension by Laurelin Labs that runs the Non-Commodity Score on the page you are viewing. Two vectors, empirical telemetry and entity connectivity, compute instantly on your device with the same canonical maths as the site tool. Add your own Anthropic, OpenAI or Gemini key and it grades experiential evidence with a judge that quotes its proof; add your own DataForSEO credentials and it measures information gain against the live Google top 10 using in-browser embeddings. Laurelin Labs collects nothing, provider costs sit on your own accounts, and every result is labelled uncalibrated and arrives with its evidence.

## FAQ

### Does NCS Checker send my data to Laurelin Labs?

No. By default nothing leaves your device and there is no account, server, analytics or telemetry. If you add your own AI key, the text of a page you score goes to the one provider you chose, under your key; if you add DataForSEO credentials, one SERP lookup per score uses your account. Laurelin Labs never sees your pages, scores or credentials, and removing your keys revokes the related permissions.

### What does a score cost to run?

The extension is free and the two on-page vectors cost nothing. With your own keys, an experiential grade is under a cent on a small model such as Claude Haiku, and an information gain run is about $0.002 for the DataForSEO SERP lookup plus a one-off 35 MB embedding model download that your browser caches.

### Why is my extension score different from the site tool for the same page?

The maths is identical and version-locked across both, so differences come from what was measured: the site tool always runs the judge, the SERP corpus changes between runs as rankings move, and the in-browser embedding runtime can drift from the server by a rounding margin. Both outputs are uncalibrated and directional, so compare trends and evidence, not decimals.

Hub: [Topical Content](/topics/topical-content.md)