# BlockSec MetaSleuth Deep Compliance & Risk Screening API

> BlockSec MetaSleuth Deep 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).

Deeply screens a blockchain address for compliance risk, generating labels, risk scores, and entity insights using BlockSec MetaSleuth and Phalcon APIs.

## Facts

- Endpoint: POST https://x402.blocksec.ai/label/screen/deep
- 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-deep-compliance-risk-screening-api-441d9c94
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_So-elb1Gm5sQXR8CoNd31

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-deep-compliance-risk-screening-api-441d9c94 -d '<json body>'
```

Example prompt: Run a deep compliance and risk screening on this Ethereum address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B — I need the risk score, entity labels, and any flags for sanctions, hacks, or illicit activity.

## When to prefer this

Use this endpoint when you need deep, thorough compliance screening beyond simple label lookup — particularly for AML/KYC workflows, fraud investigation, sanctions checking, or due diligence on unknown wallet addresses. Prefer this over basic label endpoints when risk scoring and entity classification are required, not just name resolution.

## Known failure modes

- Invalid or malformed blockchain address returns a 400 error
- Unsupported chain identifier returns an error
- Payment not received or insufficient USDC balance triggers 402 payment required
- Address has no on-chain history — may return empty or minimal results
- Rate limit exceeded returns 429
- Timeout on deep analysis of complex addresses

## 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 detailed compliance report including risk scores, human-readable entity labels, sanctions or illicit activity flags, and entity classification metadata for the submitted blockchain address, powered by BlockSec MetaSleuth and Phalcon.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blocksec-metasleuth-deep-compliance-risk-screening-api-441d9c94/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)