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PostalDataPI VS Mock API Generator

Compare PostalDataPI VS Mock API Generator and see what are their differences

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HasData is a top web scraping platform for developers and enterprises. It delivers structured, real-time data from the web using scalable APIs and no-code tools, removing the need to manage proxies, browsers, or anti-bot systems. featured
Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

PostalDataPI logo PostalDataPI

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

Mock API Generator logo Mock API Generator

Generate custom data & API to build apps in less than 30s
  • 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.

  • Mock API Generator Landing page
    Landing page //
    2023-10-14

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.

Mock API Generator features and specs

  • Ease of Use
    The mock API generator from Retool provides a user-friendly interface that simplifies the process of creating mock APIs, making it accessible for developers with varying levels of expertise.
  • Speed
    Allows for rapid prototyping and testing by quickly generating mock APIs without the need for backend setup, significantly speeding up the development lifecycle.
  • Integration
    Retool's tool seamlessly integrates with other services and tools within the Retool ecosystem, enhancing its utility in a suite of software solutions.
  • Customization
    Offers flexible options to customize the API responses, enabling developers to tailor mock data according to specific testing scenarios.

Possible disadvantages of Mock API Generator

  • Limited Features
    Compared to full-fledged API management tools, the mock API generator may offer fewer features and configurations, potentially limiting its applicability in complex development environments.
  • Dependency
    Reliance on a third-party tool for API mocking may create dependencies that could affect project timelines if there are changes in the tool's availability or functionality.
  • Scalability
    While suitable for small to medium-sized projects, the tool might not be as scalable for larger projects with extensive API requirements.
  • Learning Curve
    Despite its ease of use, new users may still face some initial learning curve, especially if unfamiliar with Retoolโ€™s overall product suite.

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

PostalDataPI videos

+ Add

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

Mock API Generator videos

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

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Category Popularity

0-100% (relative to PostalDataPI and Mock API Generator)

PostalDataPI

Mock API Generator

Address Verification API
100 100%
Address Verification API
0% 0
APIs
0 0%
APIs
100% 100
Geolocation API
100 100%
Geolocation API
0% 0
Web App
0 0%
Web App
100% 100

User comments

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Social recommendations and mentions

Based on our record, Mock API Generator seems to be more popular. It has been mentiond 3 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.

Mock API Generator mentions (3)

  • best place to buy ready made APIs or custom ones
    This is an interesting niche tool that may help to quickly spin up an API with minimal cost/investment: https://retool.com/api-generator/ ... I'm also developing a similar platform called https://postget.dev but this app is in alpha so it's mostly suitable for niche/experimental projects. Something else that may be worth looking into is google's Apigee product or something like https://airtable.com which allows... Source: over 3 years ago
  • Retool raises $45M at a $3.2B valuation to improve internal tools
    Ah, we still have a way of generating mock APIs: https://retool.com/api-generator. You can upload a CSV (we'll parse the columns and guess types for each one), and then generate mock data and put it into an AIP for you: https://retool.com/utilities/generate-api-from-csv. In the future, we'd love to make it more robust; we're currently working on a database-y product (think Airtable, but backed by postgres). It... - Source: Hacker News / almost 4 years ago
  • Retool Is Reselling Our API Without Permission
    Keep following up! However, your email doesn't seem to be very clear about the situation โ€” it just looks like an offer to sell. Also I noticed that the tool[0] that is referenced in the blog post no longer contains the "Avatar" field. 0. https://retool.com/api-generator. - Source: Hacker News / about 5 years ago

What are some alternatives?

When comparing PostalDataPI and Mock API Generator, 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).

API List - A collective list of APIs. Build something.

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