# x402.professorsausages.com Address Screener

> x402.professorsausages.com Address Screener is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-29).

Screens a blockchain address for OFAC sanctions and on-chain risk signals, returning a heuristic verdict and risk score

## Facts

- Endpoint: GET https://x402.professorsausages.com/address-screen/check/:chain/:address?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-professorsausages-com-address-screener-1c2b9739
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zRyONRot-6ClfpSYPL3kj

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-professorsausages-com-address-screener-1c2b9739
```

Example prompt: Before I send funds, can you screen the address 0xAbC123...def on Base for OFAC sanctions and on-chain risk — I want to know if it's blocked, under review, or has no red flags, plus the risk score?

## When to prefer this

Use this endpoint when you need a quick, inexpensive ($0.02 USDC) compliance pre-check combining OFAC SDN list screening with heuristic on-chain signals (contract detection, fresh wallet flag, tx count, risk score) for Base or Ethereum addresses — especially before initiating payments or smart contract interactions where regulatory or fraud risk matters.

## Known failure modes

- Invalid or malformed address returns an error or unexpected result
- Unsupported chain slug (anything other than 'base' or 'ethereum') causes a failure
- Address not checksummed — endpoint lowercases input but malformed hex may fail
- Payment failure (x402 micropayment not completed) blocks the response
- Temporarily stale data if the chain node is behind; check as_of_block for freshness
- Fresh or newly deployed contracts may lack enough on-chain history for reliable signals

## How this service works

Crypto address screening vs the FULL live OFAC SDN list, segmented by chain (bitcoin, evm, tron, +9 more) — EVM adds on-chain signals (contract, fresh wallet) → 0-100 risk score

## Output

Returns a structured object with: the chain and address screened, a boolean `sanctioned` flag and `sanction_source` (OFAC SDN or null), a `risk_score` from 0–100 (100 = sanctioned), a heuristic `verdict` enum (BLOCKED, REVIEW, or NO_RED_FLAGS_FOUND), an array of `reasons` driving the verdict, flags for `is_contract` and `fresh_wallet`, the outbound `tx_count`, the block height `as_of_block`, and a disclaimer string.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-professorsausages-com-address-screener-1c2b9739/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.professorsausages.com](https://www.zero.xyz/host/x402.professorsausages.com/llms.txt)