OPay API vs Interswitch API Comparison: Discover the best for Payment Gateways & Processors in Nigeria

OPay API is best for: Nigerian businesses needing a payment gateway that also integrates deeply with OPay's 40M+ user wallet ecosystem accepting card, bank transfer, USSD, and OPay wallet QR payments in one checkout particularly for mass-market consumer apps, FMCG merchants, and businesses selling to OPay's large mobile money user base.. Meanwhile, Interswitch API is best for: Nigerian enterprises, banks, fintechs, and businesses needing access to Interswitch's 3,000+ biller network, airtime vending, NIP instant transfers, and the Verve card network backed by Nigeria's oldest and largest payment infrastructure company.. Your choice should align with whether your team prioritizes OPay API's developer ecosystem or Interswitch API's specific capability set.

OPay API provides a dedicated sandbox testing environment and has webhook status unverified. Interswitch API offers sandbox testing and supports real-time webhooks.

OPay API pricing: Local transactions: 1.5% capped at ₦2,000. International: 4% per transaction. OPay wallet transfers: ₦5 each. Other bank transfers: ₦10 (≤₦5K), ₦25 (₦5K ₦50K), ₦50 (>₦50K). Volume discounts available for large processors.. Interswitch API pricing: Integration free. Local transactions: 1.5% capped at ₦2,000 (7.5% VAT applies). Customized volume pricing available for high-volume merchants. Settlement within 48 hours.. Both platforms offer tailored pricing structures for Nigerian transactions.

OPay API uses API Key + HMAC signature (AppId + request signing with AppKey). Keys from OPay Business Dashboard. authentication with Not publicly specified. Interswitch API uses OAuth 2.0 (Client ID + Secret Key from developer console) authentication with Not publicly specified.