ChainWarden checks OFAC sanctions across Stacks, Celo, Base, Solana, and BNB Chain in one API call — plus AML blacklist and mixer heuristics, currently seeded on Base and expanding to more chains.
No indexers to run, no lists to maintain. Send an address, get a decision.
POST a wallet address and chain to /v1/screen, authenticated with your API key.
Checked against OFAC's sanctions list, an AML blacklist, and on-chain heuristics in parallel.
A 0–100 risk score and risk level come back with the full evidence behind them.
Auto-approve, hold for review, or trigger a signed webhook. Your workflow, your call.
Every screening result is built from real, individually-verifiable evidence — not a black box.
Matched against the U.S. Treasury's consolidated sanctions list, refreshed on a schedule.
Cross-referenced against known illicit, exploit-linked, and darknet-associated addresses — currently seeded on Base, expanding to additional chains.
Flags recent interaction with known mixing services — currently seeded on Base, expanding to additional chains.
Flags exposure to protocols associated with fraud, laundering, or prior exploits — currently seeded on Base, expanding to additional chains.
OFAC sanctions screening runs on all five; AML and mixer heuristics are rolling out chain by chain, starting with Base.
Typical response under 100ms. No batching or async polling required.
OFAC sanctions screening is live across all 5 chains (Stacks, Celo, Base, Solana, BNB). Mixer & AML blacklist heuristics are currently seeded on Base only, with additional chains rolling out — see the security audit for exact coverage.
Every screening call returns evidence, not just a verdict.
No setup fees. No annual lock-in. Cancel anytime.
Every design decision here is one we can point to in the codebase — not a badge we bought.
Every webhook gets its own signing secret, generated at registration — never shared across customers.
All API traffic is encrypted in transit. Nothing crosses the wire in plaintext.
Webhook destinations are validated against internal and cloud-metadata address ranges before they're ever stored.
Every result names which list matched, which heuristic fired, and when the underlying data was last refreshed.
ChainWarden is not affiliated with, endorsed by, or operated on behalf of OFAC or the U.S. Department of the Treasury. Sanctions data is sourced from public Treasury filings.