Waymark
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squareup.com
Take a card payment with Square Payments API
domain:
squareup.com
· 4 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps
Tokenize the card client-side with Web Payments SDK to get a one-time token (cnon:...)
POST /v2/payments with source_id=token, idempotency_key (UUID), and amount_money {amount, currency}
Check payment.status == COMPLETED (or APPROVED if autocomplete=false)
Store payment.id for refunds
Known gotchas
idempotency_key is required — omitting it is a 400; reusing one returns the original payment
amount is in the smallest currency unit
Sandbox tokens (cnon:card-nonce-ok) only work against sandbox base URL
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Send payouts to debit cards using a card payout API (Visa Direct / Mastercard Send equivalent)
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