Take cards online, get paid on time, and watch revenue land in one clean dashboard — refunds and receipts handled for you.
| Provider | Card fees (typical) | Payout speed | Best for |
|---|---|---|---|
| Stripe | 2.9% + 30¢ online | 2 business days (faster available) | Online checkout, subscriptions, invoicing — the developer-friendly default |
| Square | 2.6% + 15¢ in person · 2.9% + 30¢ online | 1–2 business days | Businesses that also sell in person (POS hardware included) |
| PayPal | ~3.49% + fixed fee for PayPal checkout | Instant to PayPal balance | Buyers who already trust the PayPal button |
| ACH via Plaid | ~0.8% capped (often under $5) | 3–5 business days | Large invoices where card fees would hurt |
Sign up with the processor — Stripe, Square, or PayPal. Takes minutes.
Keys go in environment secrets on the platform — never in code, never in the repo.
Every payment event is signature-verified, so forged notifications are rejected outright.
Run the whole flow in test mode with cards like 4242 4242 4242 4242 — no real money moves.
Swap in live keys and you're taking real payments — same flow you already tested.
All names and amounts are fictional. Fees shown are typical published rates and may vary — confirm with each provider.