Scan any domain, email or IP against multiple security databases simultaneously.
Your API keys stay in your browser — nothing touches our servers because
we don't have any. Three adaptive output modes for every audience.
API STATUS
Output Mode
Explorer mode explains findings in plain English with zero jargon.
Ideal for business owners, individuals and non-technical users.
ENTER TARGET
Supports: domains · email addresses · IP addresses
5 scans remaining today🔒 All processing is client-side
phantomcheck — reconnaissance active
phantom@check:~$▋
Scanning...
Raw Source Data
⚙ API Key Setup
PhantomCheck runs entirely in your browser. Your API keys are stored
only in your browser's localStorage — they are never transmitted to
any server. Add keys to unlock each data source.
AI Interpretation Engine
Claude API (Anthropic)
Powers all three output modes — Explorer, Analyst, Operator
Keys saved to localStorage only. Clear your browser data to remove them.
Never shared with anyone including FutureStack Intelligence.
Do not use PhantomCheck on shared or public computers —
saved keys are visible to anyone with access to your browser.