user965: With Blockfrost, I can easily query which assets belong to a staking address using /accounts/{stake_address}/addresses/assets. I would like to use this approach to allow users to associate their accounts with an ADA Handle. However, I don't see an easy way to check when the Handle has been moved to a different wallet (besides querying Blockfrost every x hours). Is there a better approach using Blockfrost? Should I look into hosting a node instead?

Using Tango (so not Blockfrost), this should be possible in two weeks. See here.

user899: I don't think Blockfrost offers event based callbacks like that. You might want to look into tangocrypto, but as far as I can tell they also don't offer webhooks for this specific type of event: https://docs.tangocrypto.com/notify/notify/using-webhooks#types-of-wehooks
Maybe it's worth getting in touch with them as I think it could potentially be an interesting addition for their service.
The other option would be to set up a cardano node, as you said, and connect a db-sync (postgres) instance which you can query.

965: <p>With Blockfrost, I can easily query which assets belong to a staking address using <code>/accounts/{stake_address}/addresses/assets</code>. I would like to use this approach to allow users to associate their accounts with an ADA Handle. However, I don't see an easy way to check when the Handle has been moved to a different wallet (besides querying Blockfrost every x hours). Is there a better approach using Blockfrost? Should I look into hosting a node instead?</p>
<hr/>
<p>Using <a href="https://www.tangocrypto.com/" rel="nofollow noreferrer">Tango</a> (so not Blockfrost), this should be possible in two weeks. See <a href="https://docs.tangocrypto.com/notify/notify/trigger-rules#nft-rules-coming-soon" rel="nofollow noreferrer">here</a>.</p>
 899: <p>I don't think Blockfrost offers event based callbacks like that. You might want to look into tangocrypto, but as far as I can tell they also don't offer webhooks for this specific type of event: <a href="https://docs.tangocrypto.com/notify/notify/using-webhooks#types-of-wehooks" rel="nofollow noreferrer">https://docs.tangocrypto.com/notify/notify/using-webhooks#types-of-wehooks</a></p>
<p>Maybe it's worth getting in touch with them as I think it could potentially be an interesting addition for their service.</p>
<p>The other option would be to set up a cardano node, as you said, and connect a <a href="https://github.com/input-output-hk/cardano-db-sync" rel="nofollow noreferrer">db-sync (postgres)</a> instance which you can query.</p>
