PostalDataPI
Smarty
Melissa Data Quality
iMocha
HackerRank
Codility
TestGorilla
mettl
CodeSignal
TestDome
HackerEarth
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate โ $0.000028 per query with no tiers or subscriptions.
What you get back: Up to 18 metadata fields per postal code โ city, state/region, coordinates, timezone, three levels of administrative hierarchy, elevation, and more. Sub-5ms cached responses.
Works everywhere: US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, Canadian FSAs, and 230+ more. Format normalization handles case, spacing, and hyphen variations automatically.
Get started in 60 seconds: 1,000 free queries on signup, no credit card required. SDKs for Python and Node.js. MCP server for AI agents (Claude, Cursor, etc.).
Built for developers: REST API, consistent JSON responses across all countries, OpenAPI spec, llms.txt for AI agent discovery.
iMocha is a skills intelligence and assessment platform that enables talent teams to make smarter talent decisions. More than 300 organisations in 70+ countries are using iMochaโs platform to acquire job-fit talent faster and in measuring the ROI from their talent development initiatives. The platform comes with innovative features to conduct asynchronous interviews, AI-LogicBox (AI-based pseudo-coding simulator), AI-powered language analyser, skill benchmarking, talent analytics, and custom assessment consulting etc. Enterprises from IT/ITeS, Telecom, Banking, Financial and Insurance services, Engineering, and Healthcare verticals are using iMochaโs assessments for technical, functional and soft skills leveraging the worldโs largest skill library comprising 2500+ skills across over 300 job roles.
PostalDataPI
iMochaiMocha is recommended for HR professionals, recruitment agencies, and organizations that need to conduct technical and non-technical assessments. It's also beneficial for companies aiming to enhance their workforce's skills through targeted training and development programs.
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.