Guides

What a lookup can and cannot tell you, input by input, and how teams turn a registration check into a decision. Every guide is written against the real API response, with the limits stated plainly.

• Reverse email lookup API: accounts, breaches, mentions

  What a reverse email lookup API returns: the accounts an address is registered with, breach history and web mentions. Verified or omitted, never guessed.

  Updated 2026-08-30

• Thin digital footprint: when it is a fraud signal

  What a thin digital footprint means in a digital footprint check, when it points to a synthetic identity, when it is innocent, and how to read it.

  Updated 2026-08-30

• Username search API: find where a handle exists

  Check a username across hundreds of platforms in one request. A username search API that returns registered or not, timestamped, and omits what it cannot confirm.

  Updated 2026-08-30

• Phone number lookup API: what a phone reveals (beta)

  What a phone number lookup API returns today: registration on platforms that take a number, plus validity, carrier and line type. Phone lookups are in beta.

  Updated 2026-08-30

• Find social media accounts by email

  Find which social media accounts exist for an email address in one API request - Instagram, Spotify, GitHub and hundreds more. Verified or omitted.

  Updated 2026-08-30

• Find social media accounts by username

  Username lookup across social media: find every platform where a handle is registered in one API request, each hit confirmed and timestamped.

  Updated 2026-08-30

• Find social media accounts by phone number

  Find social media accounts by phone number with an API, with an honest account of why phone coverage is limited, what comes back, and when to use email.

  Updated 2026-08-30

• Email breach check API

  A data breach check API for email addresses: every breach the address appeared in, by name and date, returned with its platform footprint in one call.

  Updated 2026-08-30

• Verify an email at signup with a footprint check

  Verify email at signup with a digital footprint check: platforms the address is registered on, breach history and web mentions, in one call under a second.

  Updated 2026-08-30

• Digital footprint API

  A digital footprint API: one request returns where an email, username or phone number is registered across hundreds of platforms, plus breach history.

  Updated 2026-08-30

• Instant vs deep lookups: choosing the right depth

  A fast email lookup API bounded at 600ms, a standard sweep of the full band, or a deep pass over the long tail: what each returns and when to use it.

  Updated 2026-08-30