Is it secure to collect common public addresses under a wallet using BlockCypher Wallet API

Is it secure to collect common public addresses under a wallet using BlockCypher Wallet API

I am working on an exchange platform with users having separate pair of public and private keys using blockcypher api. I encountered Blockcypher Wallet API, and it seems its a pleasant way of collating Set of Public Addresses to Query Together. For some reasons, i intend to add all new generated public addresses created by any user under a single wallet name (the site name) using the "Wallet API", this will come in handy in the case where by i need to filter all incoming transactions webhook to only the public addresses under the site name into a callback url. So i needed to confirm if this is a secure way to handle it. I would appreciate if an elegant way to handle this can be suggested.

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