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Payment Processing APIs
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Popular first highlights editorial picks, then ranks providers by monthly downloads of mapped SDKs on npm and PyPI (latest refresh 2026-10-26; unavailable measurements retain older counts). Others follow A–Z.
Square
1.8M SDK downloads/moView API profileBraintree
6.4M SDK downloads/moView API profileMercado Pago
1.3M SDK downloads/moView API profilePaddle
986.3K SDK downloads/moView API profileMollie
596.8K SDK downloads/moView API profileRecurly
327.8K SDK downloads/moView API profileAuthorize.Net
318.2K SDK downloads/moView API profileiyzico
180.8K SDK downloads/moView API profileDwolla
123.1K SDK downloads/moView API profilePAY.JP
47.8K SDK downloads/moView API profileAppBind
View API profileAutoXLM
View API profileBlueSnap
View API profileBoleto Simples
View API profileChargeOver
View API profileChargify
View API profileCharityGiving
View API profileCheddar
View API profileClover
View API profileDagger For Ethereum
View API profileEpos Now
View API profileFattmerchant
View API profileForte Payments
View API profileICEPAY
View API profileLexCharge
View API profileMemberSpace
View API profileMoonClerk
View API profilePayment Rails
View API profilePAYMILL
View API profilePayPro
View API profilePractice Ignition
View API profileRev.io
View API profileRevolut for Business
View API profileTango Card
View API profileVeem
View API profileZoho Subscriptions
View API profileZuora
View API profileCounts reflect unique named profiles assigned to this category. Documentation and integration details vary by provider.