Spending under your rules
Darc controls your agent's budget
Give an AI agent a card with a daily limit and a short list of merchants. Every payment it attempts is checked on-chain before any money moves, and the verdict is public.
Agent card
Active$50 daily limit
•••• •••• A55A2 merchants
Agent: AtlasIssued by passkey
✓ Over-limit payments refused on-chainRevocable
◆ The recordSample run
✓Lagos Cloud Hosting · $20 · paid
✕Horizon Data API · $200 · DailyCapExceeded
✕Riverside Subscriptions · $15 · MerchantNotAllowed
Network: Monad TestnetChain: 10143
Passkey sign-in
Sign in to the Ledger
Use the passkey you created on this site. There is no password and no seed phrase.
Your deviceAsks for the passkey you made here
This browserDerives your account key from it
AfterwardsThe key is discarded; nothing is stored
or
Check an agent's record without signing inPasskey providers
Darc needs a provider that supports the WebAuthn PRF extension: iCloud Keychain, 1Password or Google Password Manager. Passkeys saved only to a desktop Chrome profile cannot derive an account, and sign-in will say so.
← Back to homeAgent cards, on the record