
PostalDataPI
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
Email Verification API
Easy Email API
ZeroBounce
NeverBounce
Hunter.io
Kickbox
Bulk Email Verifier & Checker
Email Verification API
Email Verifier
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions.
What you get back: Up to 18 metadata fields per postal code — 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.
PostalDataPI
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Easy Email API's answer:
Free Email Verification API focuses on doing one thing exceptionally well: fast, reliable, developer‑friendly email verification without the complexity or bloat of larger platforms. It offers a clean REST API, real‑time validation, transparent pricing, and a frictionless onboarding experience designed specifically for SaaS founders, indie hackers, and engineering teams who want accuracy without overhead.
Easy Email API's answer:
Because it delivers enterprise‑grade verification with startup‑friendly simplicity. No confusing dashboards, no upsells, no hidden limits, just predictable performance, clear documentation, and an API that integrates in minutes. It’s built for teams who value speed, reliability, and a straightforward developer experience instead of navigating heavy, multi‑product ecosystems.
Easy Email API's answer:
The API is built for SaaS products, startups, and engineering teams that need dependable email validation as part of their signup, onboarding, or transactional workflows. It’s especially suited for founders and developers who prefer lightweight, well‑documented tools that can be integrated quickly and scaled without friction.
Easy Email API's answer:
The service was created to solve a common pain point: most email verification tools are either too expensive, too slow, or too complex for modern SaaS teams. Free Email Verification API was built to offer a fast, accurate, and developer‑first alternative, something simple enough for indie projects yet robust enough for production‑grade platforms.
Easy Email API's answer:
Easy Email API's answer:
Ideal postcodes - We help businesses improve UX and data quality with a cutting edge address validation service.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Fetchify - Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Hunter.io - Find all the email addresses related to a domain