Smart-contract groups
Drop a contract. Summon your community.
Paste any contract address into a Sudo group and we'll auto-invite every wallet that ever touched it. Token-holders, NFT minters, governance voters, POAP claimers — all in one searchable, gated room.
9,200+
Smart groups live
12,408
Avg unique interactors indexed
8
Chains indexed
<60s
Indexing latency
contract address
0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984
chain · baseevents · all
Eligible holders
12,408
unique addresses that interacted with the contract — added on first message.
Token-gated
ERC-20
NFT-gated
ERC-721
POAP
event
The setup
A contract address is the new invite link.
Open Group Settings → Attach Contract. Paste the address, pick a chain, and let Sudo do the rest. We index every Transfer, Approval, Mint and custom event you select.
- Indexes every unique address that ever interacted with the contract
- Filter by event type, time window, or balance threshold
- Sudo users auto-join · non-Sudo wallets queued for invite
- Re-indexes within seconds of new transfers
What you can do
Treat any contract as a community
Address-driven membership
Paste a contract — every unique interactor becomes an invitee.
Live re-indexing
New holders auto-join as transfers happen. Group always reflects on-chain truth.
Multi-chain rules
Combine balances and ownership across Ethereum, Base, Solana and more.
Granular gates
Channel-level rules: 1+ NFT to read, 5+ to vote, holder-of-3-traits to chat.
Treasury baked in
Group treasury is a Safe multisig. Every member can propose, signers execute.
Roles by ownership
Auto-grant moderator if address holds Founder NFT. Roles update on transfer.
Who's using it
Communities already running on smart groups
NFT collections
Auto-invite every minter and current holder. Channels by trait, role for top owners.
DAOs
Voter-only chambers, top-100 delegate war rooms, public lobby for everyone else.
DeFi protocols
Liquidity-provider rooms scoped by pool, with channels for top suppliers.
Founders & investors
Cap-table rooms gated by SAFE-token NFT or vesting contract membership.
Hackathons
POAP-gated participant lounges that auto-update as new POAPs mint.
Game guilds
Auto-roll new players in as their character NFTs mint, instant Discord-killer onboarding.
How indexing works
From contract to chat in under a minute
- 01
Attach the contract
Paste the address, pick the chain, choose which events to track. Public contracts only — no private keys ever. - 02
Backfill
We replay historical Transfer / Mint / custom events from the contract's deployment block. - 03
Build the member graph
Every unique address from those events becomes an interactor record. Sudo accounts are linked. - 04
Live tail
A websocket subscription to the chain keeps the member graph in sync. New holders show up within ~30 seconds.
Privacy & safety
Indexing public contracts, not private wallets
Only public contract data
We read what's already on-chain. No private keys, no off-chain identity, no email scraping.
Members opt in
Address-matched users get a join request — they choose whether to accept.
Transparent rules
Group settings show exactly which contract, which events and which thresholds gate access.
Removable on transfer
Sell the NFT and your access auto-expires. No clinging permissions.
Safe-by-default
Auto-mod blocks airdrop scam links, bot account takeovers and approval-revoking bait.
Owner controls
Group admins can pause indexing, blacklist contracts and override rules.
FAQ