6 Best APIs for POS in Nigeria

Square API is a comprehensive payment and commerce platform API from Square, Inc. (now Block, Inc.) that enables developers to build custom point-of-sale applications, online payment flows, inventory management systems, subscription billing, and retail commerce solutions. Square provides a deeply integrated suite of commerce APIs covering payments, orders, inventory, customer management, loyalty programs, and employee management that work together to provide a complete retail and services business management platform. IMPORTANT NOTE FOR NIGERIAN DEVELOPERS: Square does not currently operate in Nigeria and does not support Nigerian merchants registering for Square accounts, processing NGN transactions, or receiving settlements to Nigerian bank accounts. Square operates in the United States, Canada, United Kingdom, Australia, Japan, France, Spain, and Ireland only. Nigerian businesses looking for equivalent payment processing capabilities should use Nigerian-licensed alternatives such as Paystack, Flutterwave, Monnify, or Kora. Despite not supporting Nigeria directly, Square API is documented here for several relevant reasons. First, Nigerian tech professionals working for international companies, remote contractors, and developers building products for non-Nigerian markets frequently work with Square. Second, Nigerian developers building applications for clients in Square-supported markets need API documentation to understand the integration requirements. Third, the architectural patterns used by Square — particularly their Payments API, Web Payments SDK, and order management system — are studied by Nigerian developers learning payment system design. The Square Payments API processes card-not-present payments through the Web Payments SDK (a JavaScript library that renders a PCI-compliant card entry form in web browsers) and the In-App Payments SDK (for iOS and Android native apps). These SDKs handle card data capture and tokenization in the browser or app, then pass a payment token to the backend which makes a charge call to the Square Payments API without sensitive card data ever touching the developer's servers. This architecture demonstrates PCI compliance best practices relevant to payment developers globally. Square Orders API provides comprehensive order lifecycle management: creating orders with line items, modifiers, and taxes, updating order status, applying discounts, processing partial fulfillments, and attaching payments to orders. This orders-centric model — where payments fulfill orders rather than existing independently — is architecturally different from many payment APIs and represents a more complete retail commerce model that connects inventory, pricing, and payment into a unified order record. Square Inventory API tracks product stock levels across multiple locations, providing real-time inventory counts, adjustment tracking, and low-stock alerting. For developers building multi-location retail management systems in Square-supported markets, the inventory API enables the stock synchronization between physical and online sales channels that prevents overselling and allows accurate availability display. Square Subscriptions API handles recurring billing, creating subscription plans with billing cadences, trial periods, and pricing tiers, and automatically charging customers on schedule. Subscription webhooks notify the integrating application of billing events, failed payments, and subscription status changes. This recurring billing infrastructure is used by subscription box services, membership businesses, and SaaS products operating in Square markets. Square Loyalty API builds customer loyalty programs directly into the payment flow, automatically awarding points on eligible purchases, tracking redemption history, and applying loyalty discounts at checkout. For businesses in Square-supported markets wanting to reward repeat customers without separate loyalty program infrastructure, the integrated loyalty system captures purchase data automatically through the normal payment flow. Nigerian developers can access Square's sandbox environment freely for learning and testing purposes, using test credentials to exercise all API endpoints without processing real payments.

RexPay is a Nigerian payment gateway solution developed by Global Accelerex Limited, a leading electronic payment and business management solutions company operating in Nigeria and West Africa. Global Accelerex holds both a CBN Payment Solution Service Provider (PSSP) certification and a CBN Payment Terminal Service Provider (PTSP) certification — a dual certification that covers online payment processing and POS terminal management respectively. This makes Global Accelerex one of the few Nigerian companies with both licenses, giving RexPay institutional-grade credibility as a payment infrastructure partner. The RexPay API is RESTful with JSON payloads. Documentation is available at rexpay-docs.globalaccelerex.com. Authentication uses an API Key obtained from the RexPay merchant dashboard. Developers initialize payment transactions by sending a POST request with the amount and transaction reference, then display the RexPay checkout to the customer. RexPay supports three payment channels in Nigeria: card payments (Visa, Mastercard, Verve with 3D Secure / 2FA verification), internet banking transfers (bank-to-bank transfers via the customer's internet banking), and USSD (for customers on basic mobile phones without internet access). This covers the three primary payment behaviors of Nigerian consumers: card users, mobile banking users, and USSD users. For WordPress-based e-commerce stores, RexPay provides a WooCommerce plugin that can be installed directly from the WordPress plugin directory. This no-code integration allows Nigerian merchants to add RexPay checkout without writing a single line of code — simply install, configure the API key from the dashboard, and payments start flowing. Pricing for RexPay starts from $0 per month, indicating no mandatory platform fee. Transaction fees are commission-based and negotiated during merchant onboarding. The exact percentage rates are not published publicly but are competitive with other Nigerian gateways. The $0/month model makes RexPay accessible to small businesses and startups that cannot commit to monthly subscription fees. The sandbox environment allows full testing of all payment channels. Moving to live requires completing the Global Accelerex KYC process, which involves submitting CAC documents, director BVN, and business bank account information. From a compliance standpoint, Global Accelerex is CBN-certified under both the PSSP and PTSP frameworks, meaning that all payment transactions processed through RexPay meet CBN regulatory standards. PCI-DSS compliance ensures card data is handled and stored securely. RexPay is a focused Nigeria-only payment gateway — it does not currently support international payment corridors or other African countries. This is a trade-off that simplifies compliance but limits its usefulness for businesses with pan-African payment needs. Known challenges: RexPay's documentation and developer community are smaller than Paystack or Flutterwave. Advanced features like split payments, virtual accounts, and recurring billing are not currently supported. International card acceptance (for non-Nigerian Visa/Mastercard holders) may have limitations. Frequently Asked Questions: What is Global Accelerex? Global Accelerex is the parent company of RexPay. It is one of Nigeria's oldest e-payment companies, providing POS terminals, payment switches, and software solutions to Nigerian banks and enterprises since the early 2000s. Does RexPay work with WooCommerce? Yes — a WooCommerce plugin is available that allows Nigerian WordPress store owners to accept payments through RexPay without any coding. Can I use RexPay for B2B corporate payments? Yes — RexPay supports internet banking transfers, which is the preferred payment method for Nigerian corporate clients making large business-to-business payments.

CBI Monie is a Nigerian payment infrastructure platform operated by CBI Technologies Limited. The company is licensed by the Central Bank of Nigeria (CBN), ISO-certified, NDPR-compliant, and PCI-DSS certified — making it one of the compliance-ready options for Nigerian businesses and fintechs needing embedded payment capabilities. CBI Monie offers multi-channel payment acceptance including POS terminals, dynamic QR codes, virtual account numbers, payment links, and a developer API for programmatic integration. What the API Does The CBI Monie API provides RESTful endpoints for: wallet balance and transaction management; QR code and virtual account generation; merchant onboarding for agent networks; payment links and checkout sessions; and real-time webhook events for automated workflows. The API is designed for fintechs, ERP systems, government platforms, and agent network operators that need to embed payment infrastructure into their products. How Developers Use It API access is by request — developers contact support@cbitechnologiesltd.com to initiate onboarding. Once approved, API credentials are issued. The platform provides SDKs and webhook integration modules. A sandbox environment is available for safe testing of transactions and webhook events before going live. The API follows RESTful conventions. Pricing Not publicly listed. CBI Monie pricing is available upon request through their sales and support team at support@cbitechnologiesltd.com. There is also a dedicated pricing page at cbimonie.com/pricing for merchant plans. Compliance CBN-licensed, ISO-certified, NDPR-compliant (Nigeria Data Protection Regulation), and PCI-DSS certified. CBI Monie handles cardholder data in compliance with international payment security standards. All merchant and API partner onboarding includes KYC verification. Supported Payment Channels POS terminals (physical card-present), dynamic QR codes, virtual account numbers (NIP transfers), payment links and hosted checkout, and web/mobile integration via API. Challenges and Gotchas (1) API access is not self-serve — requires approval and manual onboarding. (2) No USSD payment support. (3) No crypto or cross-border payment capabilities. (4) Rate limits and detailed technical specs are not publicly documented. (5) Compared to Paystack or Flutterwave, documentation is less comprehensive and publicly accessible. Company Background CBI Monie is a product of CBI Technologies Limited, a Nigerian fintech infrastructure company. The platform targets enterprise and institutional clients including government agencies, large merchants, fintechs building on top of their rails, and agent network operators who need a compliant multi-channel payment stack. FAQs Q: How do I get API access? A: Contact support@cbitechnologiesltd.com to request API access. Access is not self-serve. Q: Is there a sandbox? A: Yes. CBI Monie provides a developer-safe sandbox for testing transactions and webhooks. Q: Is CBI Monie suitable for a consumer app? A: Yes, through the wallet and virtual account APIs. It is also well-suited for B2B and enterprise platforms. Q: Does CBI Monie accept international cards? A: Yes. POS and card acceptance includes Verve, Visa, and Mastercard. Q: Can CBI Monie handle agent network onboarding? A: Yes. The Merchant Onboarding API is specifically designed for programmatically onboarding agents at scale. The PCI DSS certification of CBI Monie ensures that card data processed through the platform meets the Payment Card Industry Data Security Standard requirements for cardholder data protection. For Nigerian fintechs and enterprises concerned about compliance with card scheme requirements, CBI Monie's certified status removes the burden of achieving independent PCI DSS certification for card data handling within the integrating platform's environment. QR code payment functionality in CBI Monie enables merchant-displayed QR codes that customers can scan to initiate payments using their mobile banking apps or fintech wallets. As QR code payment adoption grows in Nigeria — driven by CBN's promotion of cashless payment infrastructure and the expansion of mobile banking usage — merchants integrated with CBI Monie can offer this payment channel alongside traditional card and bank transfer methods without additional infrastructure. Merchant onboarding APIs within CBI Monie allow platform operators managing merchant networks to programmatically onboard new merchants, verify their identity and business credentials, and activate payment acceptance — building automated merchant lifecycle management for agent banking platforms, marketplace operators, and payment aggregators managing large merchant portfolios in Nigeria.