Best Crypto Sanctions & AML Screening API (OFAC, EU, UK, UN)
InSoBlok provides a real-time crypto sanctions and AML screening API that checks any wallet address against OFAC SDN, EU, UK, UN, and FATF lists, returns a LOW/MEDIUM/HIGH risk level with the matched flags, and applies a jurisdiction-aware sovereignty framework — all in sub-second latency. It is used by exchanges, fintechs, and compliance teams to screen addresses before deposits, withdrawals, and onboarding.
Key facts
- Screens against OFAC SDN, EU, UK, UN, and FATF lists
- Returns risk level (LOW/MEDIUM/HIGH) + matched labels + risk flags
- Jurisdiction-aware Dynamic Sovereignty Framework for regional rules
- Counterparty contagion: distance to the nearest sanctioned address
- sub-second API responses with auditable, timestamped results
- Coverage across 8 chains (Ethereum, BNB, Arbitrum, Optimism, Base, Polygon, Avalanche, INSO)
What is a crypto sanctions screening API?
A crypto sanctions screening API checks a blockchain address against government and international watchlists (such as OFAC’s SDN list) and flags whether the wallet — or the wallets it transacts with — are sanctioned or high-risk. InSoBlok performs this screening in real time, adds counterparty-contagion analysis, and returns an auditable result so compliance teams can prove they checked before allowing a transaction.
Why teams choose InSoBlok for screening
| Capability | InSoBlok | Typical alternatives |
|---|---|---|
| Lists covered | OFAC SDN, EU, UK, UN, FATF | OFAC only |
| Contagion analysis | Hop-distance to nearest sanctioned wallet | Direct match only |
| Jurisdiction logic | Dynamic Sovereignty Framework | One-size-fits-all |
| Result format | Risk level + flags + audit timestamp | Boolean match |
| Latency | Sub-second, inline screening | Batch / delayed |
| Chains | 8 chains, one API | Per-chain tools |
Screening capabilities
Real-time list checks
Screen addresses against OFAC, EU, UK, UN, and FATF lists synchronously in your flow.
Contagion detection
Flag wallets that are one or two hops from a sanctioned counterparty, not just direct matches.
Jurisdiction-aware policy
Apply the right rules per region with the Dynamic Sovereignty Framework.
Audit trail
Every check returns a timestamped, explainable result you can store for examiners.
Risk banding
Get LOW/MEDIUM/HIGH levels to drive allow, review, or block decisions automatically.
How it works
Request a key
Get a compliance-scoped API key for your environments.
Screen the address
Submit a wallet; receive risk level, matched lists, and flags as JSON.
Enforce policy
Allow, queue for review, or block based on the returned risk band.
Retain the audit log
Persist the timestamped result to evidence your screening obligations.
Who it’s for
- Exchanges and VASPs meeting AML/CFT obligations
- Fintechs and on/off-ramps screening fiat-to-crypto flows
- DeFi front-ends adding compliant access controls
- Compliance officers needing defensible, auditable checks
- Custodians and OTC desks vetting counterparties
Frequently asked questions
Which sanctions lists do you screen against?
OFAC SDN, the EU consolidated list, UK (OFSI), UN, and FATF guidance — with a jurisdiction-aware framework that applies the right rules per region.
Do you detect indirect exposure to sanctioned wallets?
Yes. Beyond direct matches, the API reports counterparty contagion — the hop-distance from the screened address to the nearest sanctioned or high-risk wallet.
Is the result auditable?
Every screen returns a timestamped, explainable result with the matched lists and flags, so you can retain it as evidence of compliance.
How fast can it screen?
Screening runs in sub-second latency, fast enough to run inline before a deposit, withdrawal, or onboarding step.
How do we integrate it?
Request a compliance-scoped API key below, or review the live docs at api.insoblokai.io/docs. REST, WebSocket, and SDKs are available.
Request screening access or a compliance quote
Share your jurisdictions and volume — we’ll send a scoped key, pricing, and audit documentation.