keyword-extract

Choose this endpoint when you need a quick, cost-effective single-call summary of what a webpage is about in keyword form, especially for SEO audits, content tagging, or competitive intelligence. It complements the sibling word-frequency endpoint (top 50 words) by also providing bigrams and meta context in one call. Prefer it over general-purpose LLM summarization when you need structured frequency-ranked term lists rather than prose summaries.

• URL is unreachable or returns a non-200 status — endpoint may return an error or empty results
• Page has very little text content — keyword and bigram lists may be sparse or empty
• Page is JavaScript-rendered — content may not be extracted if the fetcher does not execute JS
• Invalid or missing URL parameter — request will fail with a validation error
• Payment not included — returns 402 Payment Required