Question 1

What is a non-custodial crypto subscription?

Accepted Answer

A non-custodial crypto subscription uses smart contracts to execute recurring peer-to-peer payments directly between a subscriber's wallet and a merchant. Unlike custodial systems, no third-party intermediary ever holds or controls the funds. AuthOnce uses EIP-2612 permit signatures so funds flow atomically from subscriber wallet to merchant wallet in a single transaction.

Question 2

How do gasless USDC recurring payments work on Base?

Accepted Answer

AuthOnce uses EIP-2612 permit-based authorization. Subscribers sign a single off-chain message — no gas required, no on-chain approval transaction. The AuthOnce keeper bot presents this permit on each billing date and pulls the exact subscription amount directly to the merchant's wallet on Base Network.

Question 3

What happens if a subscriber does not have enough USDC during a billing cycle?

Accepted Answer

If a payment fails due to insufficient balance, AuthOnce triggers a configurable grace period of 1 to 30 days. The keeper retries daily during this window before the subscription expires, giving merchants the opportunity to recover the account without abrupt service interruption.

Question 4

What is the AuthOnce protocol fee?

Accepted Answer

AuthOnce charges a 0.5% flat protocol fee per successful recurring payment. This fee is hardcoded in the smart contract — it cannot be changed unilaterally. There are no monthly fees, setup fees, or withdrawal fees. The hard ceiling is 2% and can never be raised above it.

Question 5

Which wallets does AuthOnce support?

Accepted Answer

AuthOnce supports any EVM-compatible wallet — MetaMask, Ledger, Coinbase Wallet, Rainbow, and AI agent wallets via ERC-1271. Unlike Base Spend Permissions which require a Coinbase Smart Wallet, AuthOnce works with any wallet that supports EIP-2612 permit signatures.