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Playground demo key · api.reefapi.com
post/username-osint/v1/username3 credits

Find every public account for a username across 3000+ sites (powered by the Maigret OSINT engine) → for each site where the account exists: the platform + the public profile link. Also accepts a Steam numeric ID or profile URL (steamcommunity.com/profiles/...). Scan the top-N most-popular sites (default 300), filter by tag (gaming/social/coding/…), or deep-scan to extract linked identifiers.

Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/username-osint/v1/username \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"username":"torvalds","top":"30"}'

Hit Send to run this endpoint live.