Software Alternatives, Accelerators & Startups

PostalDataPI VS API List

Compare PostalDataPI VS API List and see what are their differences

PostalDataPI logo PostalDataPI

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

API List logo API List

A collective list of APIs. Build something.
  • PostalDataPI Landing page
    Landing page //
    2026-04-08

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.

  • API List Landing page
    Landing page //
    2021-09-21

PostalDataPI features and specs

  • Specialized Postal Data
    PostalDataPI focuses specifically on postal and address-related data, providing dedicated endpoints for ZIP code lookups, address validation, and geographic postal information, making it a niche solution for mailing and logistics needs.
  • Simple API Integration
    The API appears to offer straightforward RESTful endpoints that are relatively easy to integrate into existing applications, requiring minimal setup and configuration for developers.
  • Useful for Address Validation
    The service can help businesses validate and standardize mailing addresses, reducing undeliverable mail, saving postage costs, and improving data quality in customer databases.
  • Geographic Data Enrichment
    PostalDataPI can enrich address data with additional geographic information such as coordinates, county, and timezone details associated with postal codes, which is valuable for analytics and location-based services.
  • Lightweight and Focused
    As a specialized micro-API, it avoids the bloat of larger platforms, offering a focused toolset that does one thing well โ€” handling postal and ZIP code data without unnecessary complexity.

API List features and specs

  • Variety
    API List provides a diverse range of APIs in various categories such as entertainment, data, weather, and more, making it easy to find APIs that suit different needs.
  • Ease of Access
    The platform is user-friendly and allows users to quickly browse and discover APIs without complex navigation or extensive searches.
  • Free APIs
    Many of the APIs listed on the site are free to use, which is a great advantage for developers who are looking for cost-effective solutions.
  • Updated Content
    The list appears to be maintained and updated regularly, ensuring that users have access to current and functional APIs.

Possible disadvantages of API List

  • Quality Variation
    The quality and reliability of the listed APIs can vary significantly since they come from different sources and may not all be thoroughly vetted.
  • Limited Information
    Some API listings may lack detailed descriptions or documentation links, which can make it harder for developers to assess their suitability.
  • No User Reviews
    The site does not provide a mechanism for user feedback or reviews, which could help other users to determine the usefulness and reliability of an API.
  • Possible Downtime
    There is no guarantee of uptime for the APIs listed, and some may experience downtimes or discontinuation without prior notice.

Analysis of PostalDataPI

Overall verdict

  • I don't have verified, up-to-date information specifically about PostalDataPI (postaldatapi.com), including details on its accuracy, pricing, uptime, or customer reviews. I can't confirm whether it's a good product without more direct data or firsthand testing, so I'd recommend evaluating it yourself using the criteria below before committing.

Why this product is good

  • Unable to verify specific claims about data accuracy, coverage, or update frequency for this service
  • No confirmed information on pricing tiers, rate limits, or API reliability (SLA/uptime)
  • No verified user reviews, testimonials, or third-party comparisons available
  • Company background, support quality, and documentation quality are unconfirmed
  • If considering this service, check for: free trial/sandbox access, transparent pricing, data source citations, response time benchmarks, and independent reviews on sites like G2 or Trustpilot

Recommended for

  • Not able to make a specific recommendation without verified data
  • Best approach: developers needing postal/address validation APIs should compare this against established alternatives (e.g., SmartyStreets, Lob, Google Maps Geocoding API, USPS Web Tools) based on documented accuracy and pricing
  • Suitable evaluation candidates: teams willing to test the API directly with sample data before integrating into production systems

Analysis of API List

Overall verdict

  • API List is a useful resource for developers seeking to explore various APIs across different categories. It simplifies the process of discovering APIs and provides quick access to essential information. However, like any curated directory, the quality and completeness of information about each API may vary.

Why this product is good

  • API List (apilist.fun) is a curated directory of APIs that can be helpful for developers looking for new APIs to integrate into their applications. It organizes APIs into categories, making it easier to discover tools that fit specific needs. The site often provides basic information about each API, along with links to their documentation, which can save time for developers in the exploration phase.

Recommended for

    API List is recommended for developers, software engineers, and project managers who are seeking new APIs to integrate, particularly those who are in the early stages of project planning and need an efficient way to explore available options.

PostalDataPI videos

PostalDataPI Now Returns 18 Fields Per Postal Code โ€” for 240+ Countries

More videos:

  • Tutorial - PostalDataPI Tutorial: Your First Postal Code API Call in 5 Minutes

API List videos

No API List videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to PostalDataPI and API List)
Address Verification API
100 100%
0% 0
APIs
0 0%
100% 100
Geolocation API
100 100%
0% 0
Web App
0 0%
100% 100

User comments

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Social recommendations and mentions

Based on our record, API List seems to be more popular. It has been mentiond 18 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

PostalDataPI mentions (0)

We have not tracked any mentions of PostalDataPI yet. Tracking of PostalDataPI recommendations started around Apr 2026.

API List mentions (18)

  • How to Promote and Market your API: API Directories
    This simple and intuitive website categorizes APIs (and allows for multiple categories per API). Some social aspects are introduced; like upvotes, comments, list of companies using the API. - Source: dev.to / over 1 year ago
  • Promises in JavaScript: Understanding, Handling, and Mastering Async Code
    If you havenโ€™t tried it yet, I recommend writing a simple code snippet to fetch data from an API. You can start with a fun API to experiment with. Plus, all the examples and code snippets are available in this repository for you to explore. - Source: dev.to / almost 2 years ago
  • Whatโ€™s the most exciting API you discovered?
    I don't know any good ones specifically, but https://apilist.fun was helpful back when I was playing around. Source: over 3 years ago
  • Boost Your Next Project with My Comprehensive List of Free APIs โ€“ 1000+ and Counting!
    Public-api Github Repo : https://github.com/public-apis/public-apis Rapid API : https://rapidapi.com/collection/list-... API House : https://apihouse.vercel.app/ Free APIs: https://free-apis.github.io/#/ Dev Resources : https://devresourc.es/tools-and-utili... AnyApi: https://any-api.com/ Public Apis : https://public-apis.io/ API List : https://apilist.fun/ Public APIs: https://public-apis.xyz/ Public... - Source: dev.to / over 3 years ago
  • A Beginner Developer's Guide to APIs (with Example Project)
    There are hundreds of APIs available for you to use in your projects. API List is a comprehensive list of publicly available APIs and links to the documentation and other important information for each API. - Source: dev.to / over 3 years ago
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What are some alternatives?

When comparing PostalDataPI and API List, you can also consider the following products

Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.

PublicAPIs - Explore the largest API directory in the galaxy

Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).

Spinneret - Record and Automate Anything on the Web