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Data source

OFAC SDN

Official list of US-sanctioned entities. Public domain — we use it directly, without intermediaries.

What it is

OFAC (Office of Foreign Assets Control) is a division of the US Treasury that maintains the Specially Designated Nationals (SDN) list of individuals and entities that US persons are prohibited from dealing with. It includes cryptocurrency addresses linked to terrorism, drug trafficking, money laundering, and sanctions violations.

959crypto addresses in the DB
20supported chains
24hupdate frequency

How we use it

  • We load the official SDN XML file from treasury.gov (public domain).
  • We parse the sdnEntry > idList > id structure, extracting all Digital Currency Address records.
  • We store addresses in Supabase tagged by chain (XBT, ETH, TRX, USDT, etc.).
  • A cron job syncs the database daily; an in-memory cache refreshes hourly.
  • On address check, an exact match by chain yields risk 90 (Critical).

Why not OpenSanctions

OpenSanctions is an excellent aggregator of 413 sources, but its CC BY-NC license prohibits commercial use. We deliberately work directly with the primary source (OFAC), which lets us monetize the service without licensing restrictions.

Examples of sanctioned addresses

  • LAZARUS GROUP (DPRK) — Ethereum addresses linked to exchange hacks.
  • BANK MARKAZI IRAN — Tron addresses of the Central Bank of Iran.
  • Garantex — crypto exchange sanctioned since 2022.