Content grader

Surfer / Clearscope replacement. Pulls the top-10 SERP results for your keyword, builds a TF-IDF corpus, then scores your draft on length and how much of what the ranking pages cover you actually cover. Keyword density is measured but deliberately not scored — it isn't a ranking factor. Free, no paid API.

We pull the top 10 SERP results, fetch each one's body text, compute TF-IDF, and score your draft against the corpus. Takes about 60-90 seconds.