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ProblemsByVin API vs TransparentCars API

Two free Vehicle APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

  • Choose ProblemsByVin API if its data fits your use case better; on access and reliability it's level with TransparentCars API.
  • Choose TransparentCars API if its data fits your use case better; on access and reliability it's level with ProblemsByVin API.

Side by side

ProblemsByVin APITransparentCars API
What it doesOwner complaints, recalls and failure-mileage statistics by vehicle make, model and year.Fair-price valuation and yearly road tax (IUC) for used cars in Portugal.
ProviderProblemsByVinTransparentCars
API keyNot neededNot needed
HTTPSYesYes
CORS (browser calls)YesYes
Status todayOnline · 523 msOnline · 644 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
ProblemsByVin docs ↗TransparentCars docs ↗

About each API

ProblemsByVin logoProblemsByVin API

Owner complaints, recalls and failure-mileage statistics by vehicle make, model and year.

Free, downloadable datasets derived from 78,000+ NHTSA owner complaints and 4,900+ recalls: failure-mileage quartiles, post-warranty failure patterns, recall gaps, and engine/transmission complaint density. CSV + JSON, CC BY 4.0.

Strengths

  • No API key needed
  • Callable from the browser (CORS)
  • HTTPS

Ratings, reviews and FAQ →

TransparentCars logoTransparentCars API

Fair-price valuation and yearly road tax (IUC) for used cars in Portugal.

Open, key-free API for the Portuguese used-car market: fair-price valuation, road tax and running cost, and stock. OpenAPI 3.1, MCP server, no API key.

Strengths

  • No API key needed
  • Callable from the browser (CORS)
  • HTTPS

Ratings, reviews and FAQ →

How to choose between them

  • Prototyping or a tutorial? Pick the one that needs no API key (both qualify).
  • Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
  • Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
  • Still unsure? Both are free to try: send one request to each and compare the data you get back.

ProblemsByVin vs TransparentCars FAQ

Do ProblemsByVin API and TransparentCars API need an API key?

Neither needs an API key; you can call both straight away.

More comparisons

ProblemsByVin API alternatives · TransparentCars API alternatives · best Vehicle APIs