Screen an address before you pay it.

Every buyer on an x402 rail is an agent about to move money to an address it has never seen. Sentinel answers that question in one call: OFAC sanctions, known-bad labels, lookalike / address-poisoning detection and live on-chain hygiene — with a reason string for every point of the score. paid per callno account no KYC

Live dataset

Free feed: /v1/sanctions (the whole OFAC list, no payment) and /v1/sanctions/delta — first snapshot stored — the delta feed becomes meaningful from the second daily build.

Prices

Route	Price	What you get
POST /v1/screen	$0.02	EVM address -> pre-payment risk verdict: OFAC sanctions, known-bad labels, lookalike/poisoning detection and on-chain hygiene
GET /v1/lookup	$0.02	EVM address (query param) -> pre-payment risk verdict: OFAC sanctions, known-bad labels, lookalike detection, on-chain hygiene
POST /v1/screen/batch	$0.10	Up to 25 EVM addresses -> risk verdicts in one call (5x cheaper per address; the tier to use before a payout run)

USDC on Base, settled over x402. Call without payment and you get a 402 carrying the challenge; sign it and retry — that is the whole protocol. Free routes stay free: /healthz, /v1/pricing, /v1/sources, /.well-known/x402, /openapi.json.

Try it

# free — the whole sanctions list
curl https://sentinel.pentest.i.ng/v1/sanctions

# paid ($0.02) — a full verdict
curl -X POST https://sentinel.pentest.i.ng/v1/screen \
  -H 'Content-Type: application/json' \
  -d '{"address":"0x0330070FD38Ec3bB94F58FA55D40368271E9e54A","chain":"base"}'

# paid ($0.10) — up to 25 addresses in one call
curl -X POST https://sentinel.pentest.i.ng/v1/screen/batch \
  -H 'Content-Type: application/json' \
  -d '{"addresses":["0x...","0x..."]}'

Label sources

Category	Addresses
reported_scam	2 530
phishing	376
unknown_bad	242
sanctions	120
scam	30
exploit	12
darknet	2

Public data only — OFAC SDN digital-currency addresses (US Government public domain), ScamSniffer, MyEtherWallet ethereum-lists. Provenance, per-source counts and the full scoring table are at /v1/sources. Scores are additive and every point carries a reasons entry.

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