Run KYT on a crypto withdrawal

1Submit the transaction for screening

POST the transaction to the KYT endpoint with the direction set to out. This is a C3 call. Reference the transaction by hash so the screen resolves the destination and its exposure.

curl -X POST https://api.1st-node.com/v1/aml/eth/screen \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{"tx":"0x9f2c...","direction":"out"}'

2Read the decision

The response returns a decision of allow, review, or block alongside the contributing score and exposure. Route allow straight to broadcast, hold review for a human, and stop block entirely.

> { "decision": "review", "score": 58, "risk_level": "medium", "exposure": [{ "category": "gambling", "hops": 2 }] }

3Gate the payout on the decision

Wire the decision field into your withdrawal state machine. Only allow proceeds automatically; review and block move the withdrawal to a hold queue instead of broadcasting.

4Store the response for audit

Persist the full KYT response keyed to the withdrawal id. The score, decision, and exposure form the evidence for why the transaction was released or held.