
PostalDataPI
Smarty
Melissa Data Quality
TestRail
PractiTest
Sauce Labs
Zephyr
Qase
UserTesting.com
RainforestQA
Micro Focus ALM
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.
TestRailโs web-based test case management is used by thousands of great QA and Development teams to efficiently organize, track and manage software testing.
PostalDataPI
TestRailTestRail is recommended for quality assurance teams, software development teams, and project managers who want to improve their testing process management. It is particularly beneficial for medium to large teams that require extensive collaboration, comprehensive reporting, and a structured approach to managing test documentation and execution.
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
PractiTest - PractiTest is a cloud based Innovative test management tool.
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.