1 Best APIs for Post Office Details in Nigeria

India Pincodes API is a free, public REST API that provides postal code (PIN code) lookup data for India's postal system. Given an Indian PIN code (6-digit postal code), the API returns the associated post office details including post office name, branch type, delivery status, district name, division, region, circle, and state. This is useful for applications targeting the Indian market that need to validate delivery addresses, identify serviceable areas by postal zone, or provide location context from a postal code input. The API requires no API key or account registration — queries are made with simple HTTP GET requests and responses are returned as JSON. This zero-setup approach makes it easy to integrate into Indian address validation workflows. Coverage is comprehensive for India's postal network of over 150,000 post offices. This API has no relevance for Nigerian applications or users. India and Nigeria use completely different postal addressing systems — Nigeria does not have a PIN code system equivalent to India's, and Nigerian postal codes (where used) follow a different format managed by NIPOST. Nigerian developers should disregard this API for domestic use and consider it only if building applications that specifically require Indian address validation or postal coverage as part of a global application.