Data

who’s got the best API for address clustering? 

ie: for a given address return addresses very likely owned by the same person (based on transfer patterns)

Chainalysis once built a honeypot tool for "finding addresses related to your address" to collect bad actor IP addresses lol.

I think the best option now is Cielo:

Chainalysis once built a honeypot tool for "finding addresses related to your address" to collect bad actor IP addresses lol.

I think the best option now is Cielo: https://developer.cielo.finance/reference/getrelatedwallets