3 Best APIs for African Fintech in Nigeria

Wireless Card Issuing and USSD API is an African fintech infrastructure platform that combines card issuance capabilities with USSD payment processing, providing two distinct but complementary payment channels through a single API integration. By offering both card-based payments for smartphone and internet users and USSD-based payments for feature phone and low-connectivity users, Wireless enables Nigerian and African platforms to maximize their payment acceptance coverage across the full spectrum of device and connectivity capability in the market. USSD (Unstructured Supplementary Service Data) is a GSM protocol that works on every mobile phone — from basic feature phones to modern smartphones — by dialing a short code that initiates a menu-driven session with a backend system. USSD requires no internet connection, no data plan, no smartphone, and no app installation. The payment session is conducted entirely through the familiar dial-pad interface that every mobile phone user already knows how to use. In a country like Nigeria where smartphone penetration reaches approximately 50 percent of mobile users, USSD-based payments provide critical market reach into the 50 percent of mobile users on feature phones and the substantial portion of smartphone owners who are on very limited data plans or in areas with poor internet connectivity. The Wireless USSD API provides a programmatic backend for USSD payment flows, connecting the carrier-delivered USSD session to the merchant's payment system. When a customer dials the merchant's USSD short code, the session is routed through Wireless's infrastructure to the merchant's API endpoint, which delivers menu prompts and processes customer inputs to complete the payment transaction. The merchant's API receives structured session data, can respond with text menus, and receives notification of successful payment completion. Card issuance through Wireless allows partner platforms to issue physical and virtual payment cards to their customers, extending the card infrastructure alongside the USSD capabilities. The combination serves different user segments: USSD for the feature phone and low-bandwidth segment, cards for internet-connected and smartphone users. A platform using Wireless can serve both groups from a single API relationship rather than integrating separate USSD and card infrastructure providers. Low-bandwidth optimization in Wireless's platform design reflects the reality that much of Nigeria's mobile internet infrastructure delivers variable data speeds. Payment flows and API responses are designed to function reliably even on 2G EDGE connections, which are still prevalent in rural areas and can appear in urban areas during network congestion. This optimization is not just a technical detail — it directly affects whether customers in rural Nigerian states and smaller towns can successfully complete transactions or are excluded from digital payment access. Spending controls on Wireless-issued cards allow partner platforms to configure transaction limits, merchant category restrictions, and per-day or per-period spending caps. For fintech platforms issuing expense cards or input finance cards with use restrictions, these controls ensure that issued cards are used within the intended scope. A cooperative issuing cards for agricultural input purchases can restrict card spending to approved input supplier merchant categories, preventing misuse of financed funds. Real-time authorization events from card transactions are delivered via webhooks to the partner platform, enabling immediate transaction visibility, fraud monitoring, and customer notification. For platforms operating at scale, real-time transaction events are essential for maintaining accurate account balances, detecting suspicious patterns, and delivering the instant transaction notifications that customers expect from modern fintech products. The dual-channel payment architecture of Wireless — covering both USSD for basic connectivity and cards for internet connectivity — reflects a practical response to Nigeria's heterogeneous digital infrastructure reality. Platforms that deploy only card or only online payment channels systematically exclude the portions of their potential market that don't have internet access or smartphone capability. Wireless's combined infrastructure removes this trade-off, enabling payment acceptance across the full user base a Nigerian platform serves.

Miden Banking as a Service API is a sub-Saharan African fintech infrastructure platform that provides card issuance, corporate expense management, virtual accounts, wallet-as-a-service, and multi-country payout capabilities to financial institutions, fintechs, enterprises, and technology companies building embedded payment and financial products across Africa. Miden focuses on the corporate and enterprise financial product space, with particular strength in expense management, corporate card programs, and cross-border payment disbursement. Corporate card issuance is a key Miden capability, enabling partner organizations to issue company expense cards to employees with programmatic spend controls, real-time transaction visibility, and expense categorization. Miden's corporate card infrastructure supports building employee expense management tools where finance teams can see every card transaction in real time, configure per-employee or per-category spending limits, and reconcile expenses automatically without waiting for end-of-month manual reconciliation. For Nigerian companies managing employee expenses across multiple locations and departments, programmatic corporate card management replaces unwieldy petty cash and reimbursement processes. Virtual card issuance through Miden enables platforms to create virtual cards for specific use cases: vendor payment cards with merchant restrictions, single-use purchase cards for procurement, corporate virtual cards for online business expenses, and customer-facing virtual cards for fintech products. Virtual cards are created instantly through the API without physical card production timelines, making them suitable for immediate digital payment needs. NGN and USD accounts provide multi-currency financial infrastructure for Miden partner platforms. Naira accounts enable Nigerian interbank transfers and local payment operations. USD accounts allow platforms to hold dollar balances, make USD-denominated payments, and provide foreign currency account functionality to their customers. The combination of naira and dollar accounts in a single integration supports the multi-currency operational needs of Nigerian businesses engaged in both local and international commerce. Bill payments integration through Miden enables partner platforms to offer airtime top-up, utility bill payment (AEDC, EKEDC, IKEDC, BEDC), cable TV subscriptions (DSTV, GOtv, Startimes), internet data subscriptions, and other Nigerian bill payment categories to their customers. Embedding bill payments into a fintech or banking product increases platform stickiness — customers who pay all their bills through the same app they use for banking are less likely to churn to competing products. Bulk payout operations through Miden enable mass disbursement to bank accounts and mobile money wallets across multiple African countries. For Nigerian logistics companies, gig economy platforms, agricultural aggregators, and marketplace operators that need to pay large numbers of individuals across Nigeria and neighboring markets, Miden's bulk payout API provides the disbursement infrastructure to process hundreds or thousands of individual payouts efficiently in a single operation. Wallet as a Service capabilities allow partner platforms to create digital wallets for their customers — stored value accounts that can receive deposits, make payments, and earn rewards — without the complexity of building wallet infrastructure independently. For Nigerian platforms wanting to add a loyalty or savings wallet feature to their product suite, Miden's Wallet as a Service provides the backend for wallet account management, balance tracking, and transaction processing. Mobile money payout support extends Miden's disbursement coverage to mobile money wallet recipients in markets where mobile money is the primary financial access tool — particularly relevant for cross-border payouts to recipients in Ghana (MTN Mobile Money, Vodafone Cash), Kenya (M-Pesa), and other African markets where mobile money is more prevalent than bank accounts. This multi-rail payout coverage enables Nigerian platforms reaching pan-African beneficiary populations to make payouts regardless of whether recipients have bank accounts.

Sudo Africa Cards and Accounts API is a pan-African Banking-as-a-Service platform that enables fintech companies, startups, and financial service providers across Africa to issue virtual and physical payment cards, create multi-currency bank accounts, and build card-based financial products without requiring independent bank or card scheme licensing. Sudo Africa provides the regulatory infrastructure and card scheme relationships that allow technology companies to offer branded financial products as a service layer on top of Sudo's licensed banking infrastructure. Virtual card issuance is the core product of Sudo Africa. Partner applications can programmatically create virtual Mastercard cards linked to customer accounts or corporate budgets, generating card numbers, expiration dates, and CVV codes that customers can use immediately for online purchases without waiting for physical card delivery. Virtual cards are particularly suited to use cases where immediate availability is important: online subscription payments, international online shopping, e-commerce checkout, and API-to-API payment scenarios where a card credential is needed but no physical card is required. Physical card issuance is also supported through the Sudo Africa API, enabling partner platforms to issue plastic Mastercard cards that are personalized, printed, and delivered to customer addresses. Physical cards extend card utility to POS terminal payments and ATM cash withdrawal in addition to online use. For neobanks, digital savings platforms, and fintech companies building consumer banking products, physical card issuance transforms a digital-only product into a full banking experience that customers use in everyday physical commerce. Spending controls are a critical feature for corporate card and expense management use cases. The Sudo Africa API allows setting per-transaction amount limits, daily spending limits, merchant category code (MCC) restrictions, and geographic restrictions at the card level. A Nigerian corporate expense management platform can issue employee cards with category restrictions that prevent purchases outside approved expense categories — limiting cards to business travel, approved vendor categories, or business expenses — while allowing flexibility within those categories. Multi-currency account support enables Sudo Africa partners to create both NGN and USD accounts for their customers. USD accounts allow Nigerian platform customers to hold and transact in US dollars, which is valuable for Nigerian businesses and individuals managing international payments, receiving USD income, or maintaining foreign currency savings. The ability to hold both naira and dollar balances through a single platform relationship provides currency flexibility without requiring customers to maintain accounts at multiple institutions. Real-time authorization webhooks notify partner platforms of every card transaction as it occurs, enabling platforms to implement transaction-level monitoring, fraud detection, and spending alerts. When a customer's Sudo-issued card is used at any merchant, the partner platform receives an immediate webhook event containing transaction details — merchant name, amount, category, location — that it can use to power real-time spending notifications, dashboard updates, and automated compliance checks. Card lifecycle management through the Sudo API covers the full card lifecycle: creating cards in inactive state, activating them, freezing and unfreezing (for customer-initiated temporary holds or security responses), and permanently cancelling cards. This programmatic lifecycle control allows partner platforms to implement security features like instant card freeze in response to customer theft reports without requiring interaction with a call center or physical card replacement timelines. Sudo Africa operates across multiple African markets beyond Nigeria, making it suitable for fintech platforms building pan-African financial products that need card and account infrastructure in multiple countries from a single API relationship. This multi-country coverage reduces integration complexity for African fintechs expanding to multiple markets compared to establishing separate banking infrastructure relationships in each country.