postal-code-checker is a comprehensive JavaScript/TypeScript package for validating postal codes across multiple countries. It provides an easy-to-use API for country selection and postal code validation, making it ideal for forms and address validation in web applications.
JSON Schema for CV/Resume parsing and validation. Self-hosted with JSON-LD, Schema.org integration, online validator, converter tools, and XML support.
Validate Nigerian postcodes in Rust, Python, JavaScript, Java, PostgreSQL, DuckDB, and Polars, with MCP servers for AI agents. Covers Nigeria's NIPOST digital postcode (NDAPS): offline validation, lookup, and reverse geocoding.