I've integrated ENS resolving into several projects now (both my own and as a contributor/collaborator), but found the standard approach of querying ENS contracts directly to be quite slow for most use cases, and can quickly eat up Alchemy/Infura node resources if you're not careful.

To help with this, I built an incredibly fast API (thanks to Cloudflare's edge caching) for resolving and reverse-resolving ENS names and addresses and avatars (30-50ms with a warm cache).

API docs are here: https://ensideas.com/about And open source code here: https://github.com/holic/ens-ideas

Examples:

• https://api.ensideas.com/ens/resolve/0xc9c022fcfebe730710ae93ca9247c5ec9d9236d0
• https://api.ensideas.com/ens/resolve/frolic.eth

This is already in use in the following projects and processing millions of ENS queries per month:

• https://juicebox.money/
• https://reservoir.tools/
• https://www.utopialabs.com/
• https://terraformexplorer.xyz/
• https://gallery.so/
• https://tombseri.es/
• https://okpc.app/
• https://shields.build/