# ChainAnalyzer CoinJoin/Mixing Transaction Detector

> ChainAnalyzer CoinJoin/Mixing Transaction Detector 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).

Detects CoinJoin and mixing patterns in a blockchain transaction, identifying Wasabi, JoinMarket, Whirlpool, and generic peel-chain activity.

## Facts

- Endpoint: GET https://chain-analyzer.com/api/v1/x402/tx/a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6/coinjoin
- 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-coinjoin-mixing-transaction-detector-52a6a565
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uFDI2kGWXR_p03lcDNlAB

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-coinjoin-mixing-transaction-detector-52a6a565
```

Example prompt: Can you check if transaction a1b2c3d4e5f6 is a CoinJoin or mixing transaction — specifically whether it matches Wasabi, JoinMarket, or Whirlpool patterns?

## When to prefer this

Use this endpoint when you need to determine whether a specific transaction employed privacy-enhancing techniques such as CoinJoin or coin mixing. Ideal for AML compliance workflows, transaction forensics, or flagging obfuscated fund flows. Prefer over a general AML risk score endpoint when the specific concern is mixing/tumbling behavior rather than overall risk or sanctions screening.

## Known failure modes

- Invalid or malformed transaction hash returns 400 error
- Transaction not found on supported chain returns 404
- Unsupported blockchain returns an error indicating chain not available
- Rate limiting or payment failure returns 402 Payment Required
- Transaction is a standard non-mixing tx with no pattern detected — result is negative/clean

## How this service works

CoinJoin / mixing transaction detection. Identifies Wasabi, JoinMarket, Whirlpool patterns plus generic peel chains.

## Output

Returns a classification of the transaction indicating whether it is a CoinJoin or mixing transaction, which specific protocol (Wasabi, JoinMarket, Whirlpool, or generic) was detected, peel chain indicators, and associated confidence or pattern metadata.

## 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-coinjoin-mixing-transaction-detector-52a6a565/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)