API
summary
Fern’s API lets builders provision multi-chain EVM wallets (Arbitrum, Base, Ethereum, Optimism, Polygon) with gas sponsorship, create quotes that map one-to-one to transactions, and follow returned transfer instructions to complete on/off ramps. The Multiplex routes via liquidity, compliance, and routing layers. Supports >10 fiat payins and 50+ fiat currencies for payouts, offers fern auto fiat accounts (USD, EUR, MXN) that auto-convert to crypto, flat USD developer fees, builder tier with no monthly fee, KYC <10 minutes and KYB ~1 business day.
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chapters (23)
- 0:00Start
- 0:10Introduction & workshop outline
- 0:59What is Fern
- 1:27Core building blocks of the Fern API
- 2:57Supported funds flows
- 5:35Fern Multiplex architecture
- 7:28Supported fiat currencies
- 8:25Getting started via the Fern dashboard
- 10:41Core API concepts: Customers, accounts, quotes, transactions
- 14:29Common on/off ramp workflow
- 15:10KYC/KYB verification methods
- 17:39Registering payment accounts & wallets
- 19:34External bank accounts & hosted forms
- 21:19Fern auto fiat accounts
- 22:50First- and third-party account registration
- 23:10Creating quotes: source & destination details
- 24:35Developer fees & monetization
- 26:08Crypto-only vs fiat transactions
- 26:30Creating transactions from quotes
- 27:48Transfer instructions & fund movement
- 28:41KYC requirements for fiat transactions
- 29:05How to get support & join Fern’s Discord
- 31:03Closing remarks
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