# BlockSec MetaSleuth Ethereum Address Label & Compliance Risk Screening API

> BlockSec MetaSleuth Ethereum Address Label & Compliance Risk Screening API is a paid API for AI agents from x402.blocksec.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Returns human-readable labels, entity metadata, and compliance risk scores for a given Ethereum blockchain address using BlockSec MetaSleuth and Phalcon intelligence.

## Facts

- Endpoint: GET https://x402.blocksec.ai/label/eth/0x37bb80a5f5d65b9ea1fa730fb24135c5f8fb528c
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blocksec-metasleuth-ethereum-address-label-compliance-risk-screening-9d2fac91
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2iV_ftfSRvrGpXyOghoiE

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 blocksec-metasleuth-ethereum-address-label-compliance-risk-screening-9d2fac91
```

Example prompt: Can you screen the Ethereum address 0x37bb80a5f5d65b9ea1fa730fb24135c5f8fb528c for me — I need to know if it's associated with any known entity, exchange, or risky actor, and what its compliance risk score is?

## When to prefer this

Use this endpoint when you need compliance-grade risk screening and entity labeling specifically for Ethereum addresses, powered by BlockSec's MetaSleuth and Phalcon datasets. Prefer it over generic blockchain explorers when you need structured risk scores and entity metadata suitable for AML/compliance workflows.

## Known failure modes

- Unknown or unlabeled address returns empty label or low-confidence result
- Invalid Ethereum address format returns a 400 error
- Address has no on-chain history and therefore no risk signals
- Payment not received or insufficient USDC balance returns 402 Payment Required
- Rate limiting or API quota exceeded returns 429

## How this service works

X402 payment protocol demo for blockchain address label query and compliance risk screening. Powered by BlockSec MetaSleuth and Phalcon compliance APIs.

## Output

Returns a label (e.g. exchange, mixer, scammer, DeFi protocol), entity name, risk classification, and compliance metadata for the queried Ethereum address, sourced from BlockSec MetaSleuth and Phalcon intelligence databases.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blocksec-metasleuth-ethereum-address-label-compliance-risk-screening-9d2fac91/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.blocksec.ai](https://www.zero.xyz/host/x402.blocksec.ai/llms.txt)