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Use search when the broad directory stops being enough. Filter by category, auth, CORS, signup friction, and result freshness until the shortlist becomes obvious.
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Configuration API
Adyen Balance Platform API is the core of "Adyen for Platforms" — manage balance accounts, payment splits, and KYC across multiple merchants on a marketplace/SaaS platform.
Stripe Connect API
Stripe Connect is multi-merchant payments for marketplace / SaaS platforms — create per-merchant subaccounts, auto-split, compliance KYC, bank transfers.