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

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.. Meanwhile, 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.. Your choice should align with whether your team prioritizes Interswitch API's developer ecosystem or OPay API's specific capability set.

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

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.. 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.. Both platforms offer tailored pricing structures for Nigerian transactions.

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