2 Best APIs for Address validation in Nigeria

ShipEngine is a multi-carrier shipping API aggregating 50+ carriers globally (USPS, UPS, FedEx, DHL, and various regional/local carriers) under a single integration, primarily built for US and international e-commerce but with carrier coverage that extends into African and Nigerian logistics partners as part of its broader carrier network. A single API call returns comparable rate quotes across all connected carriers for a given shipment, and label generation/booking follows the same unified request format regardless of which carrier is ultimately selected. Beyond rate shopping and label printing, ShipEngine provides address validation (catching malformed addresses before a shipment is booked, reducing failed-delivery costs), tracking updates aggregated into one webhook format regardless of carrier, and batch operations for processing large volumes of orders at once — relevant for a marketplace or high-volume e-commerce platform processing hundreds of daily shipments. For Nigerian businesses that ship internationally (exporting products, or a marketplace with both local and cross-border sellers), ShipEngine's primary strength is depth of *international* carrier coverage and address validation for non-Nigerian destinations — for purely domestic Nigerian shipping, a Nigeria-focused aggregator like Shipbubble typically has stronger local carrier relationships and pricing. ShipEngine bills on a per-shipment/API-call basis with a free sandbox for development.