Detect mixer exposure

1Check the exposure array

Request the risk score and inspect the exposure array for a mixer category. The hops field tells you how many transaction steps separate the address from the mixer. This is a C3 call.

curl https://api.1st-node.com/v1/aml/eth/0x7c3d.../risk \
  -H "Authorization: Bearer sk_live_..."
> { "score": 81, "risk_level": "high", "confidence": 0.9, "exposure": [{ "category": "mixer", "hops": 1 }] }

2Confirm the path with a fund-flow trace

When exposure shows a low hop count, trace the inbound flow to see the actual path to the mixer. Fund-flow tracing is a C4 call, so reserve it for confirmation rather than blanket screening.

curl "https://api.1st-node.com/v1/intel/eth/0x7c3d.../flow?dir=in&hops=3" \
  -H "Authorization: Bearer sk_live_..."

3Grade by hop distance

Direct exposure at hop 1 is materially different from hop 3. Apply stricter handling to shorter distances and record the hop count that drove the grading.