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Playground demo key · api.reefapi.com
post/seo-toolkit/v1/keyword_suggestions1 credit

Keyword ideas from Google/Bing autocomplete; depth=deep does alphabet-soup + question-prefix expansion (100s of ideas from one seed). 'url' derives the seed from a page's topic (keywords-by-URL); 'questions=true' returns PAA-style question keywords

Working example
Parameters
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curl -X POST https://api.reefapi.com/seo-toolkit/v1/keyword_suggestions \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"seed":"running shoes","depth":"shallow"}'

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