# ChainAnalyzer AML Risk Score

> ChainAnalyzer AML Risk Score is a paid API for AI agents from chain-analyzer.com, paid per call via x402, $1/call, status unknown (last checked 2026-09-14).

Returns an AML risk score for a given blockchain address using 76+ detection rules and a 3-model ML ensemble across 8 supported chains.

## Facts

- Endpoint: GET https://chain-analyzer.com/api/v1/x402/address/:address/risk-score
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainanalyzer-aml-risk-score-4c94a44b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7QVu_9fadSXV2IxGWYSQv

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 chainanalyzer-aml-risk-score-4c94a44b
```

Example prompt: Run a full AML risk score on the Ethereum address 0x4e9ce36e442e55ecd9025b9a6e0d88485d628a67 — I need the ML ensemble risk assessment before I process a payment from it.

## When to prefer this

Use this endpoint when you need a rapid, ML-backed AML risk score for a specific blockchain address on one of the 8 supported chains, especially when you want more than a simple sanctions hit — combining rule-based detection with graph neural network and anomaly ensemble scoring for nuanced risk assessment.

## Known failure modes

- Unsupported chain — BNB Smart Chain not available on self-serve tier, returns error or requires Enterprise access
- Invalid or malformed address format — returns 400 error
- Address not indexed yet — may return no data or low-confidence score
- Payment failure — x402 $1 USDC payment not processed, returns 402
- Rate limiting or quota exceeded on self-serve tier

## How this service works

AML risk score for a blockchain address. 8 chains live for self-serve x402 (Bitcoin, Ethereum, Polygon, Base, Arbitrum, Optimism, Avalanche, Solana); BNB Smart Chain available on Enterprise rollout. 76+ detection rules, 3-model ML anomaly ensemble (Isolation Forest + AutoEncoder + GraphSAGE).

## Output

Returns an AML risk score and risk classification for the queried blockchain address, combining outputs from 76+ detection rules and a three-model ML ensemble (Isolation Forest, AutoEncoder, GraphSAGE) to flag anomalous, high-risk, or money-laundering-associated behavior.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   }
  },
  "output": {
   "properties": {
    "example": {}
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainanalyzer-aml-risk-score-4c94a44b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chain-analyzer.com](https://www.zero.xyz/host/chain-analyzer.com/llms.txt)