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IsValid.dev
Abstract APIs
Numverify
mailboxlayer API
IBAN.com
VAT-calc.net
Melissa Data Quality
MailValidation.io
IsValid is a validation API service for developers who need to quickly verify data formats without building their own validators. It offers 40+ endpoints covering financial identifiers (IBAN, BIC, ISIN, CUSIP), international standards (ISBN, ISSN), technology formats (UUID, JWT, QR codes), regional codes (PESEL, REGON, VAT), and more.
The service works on a freemium model โ 100 free API calls per day, no credit card required. Users manage API keys through a dashboard with usage analytics showing daily call volume and per-endpoint breakdowns.
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Sketch is recommended for UI/UX designers, product designers, and digital artists who focus on app and web design. It is particularly suitable for teams that require real-time collaboration and those who benefit from using a tool with a vast ecosystem of plugins that can extend its functionality.
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IsValid.dev's answer:
IsValid offers 70+ validators in a single API โ covering financial identifiers (IBAN, BIC, ISIN, LEI), international standards (ISBN, ISSN), technology formats (UUID, JWT, QR codes), tax numbers (VAT, REGON, PESEL), credit cards, phone numbers, and more. No need to integrate multiple services for different data types.
IsValid.dev's answer:
Most validation APIs focus on one category (email or phone). IsValid covers financial, regional, and technical formats all in one place with a consistent REST API. The free tier with 100 calls/day requires no credit card, and integration takes minutes.
IsValid.dev's answer:
Developers and software teams building applications that handle user input, financial data, or international identifiers โ particularly in fintech, e-commerce, and SaaS products.
IsValid.dev's answer:
IsValid was built out of frustration with piecing together multiple validation libraries and services. The goal was a single, reliable API that handles the full range of data validation needs developers encounter in real-world applications.
IsValid.dev's answer:
Next.js, Fastify, PostgreSQL, Docker
Based on our record, Sketch 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.
Start by building the PDF version, as that's easier. I use Sketch (sketch.com) for designing layout. Source: over 3 years ago
This TG-16 controller was originally drawn in Fireworks CS4 waaaaaay back in the day, but I re-drew it by hand using simple shapes and effects in Sketch and Figma. Source: almost 4 years ago
Every designer has to choose their preferred design tool where they can implement their prototypes.Try Figma, Sketchand Adobe XD. These are the main tools, try each and find your favorite, as for me I love Figma(Very good in collaboration). - Source: dev.to / almost 5 years ago
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Abstract APIs - Simple, powerful APIs for everyday dev tasks
Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
Numverify - Global phone number validation and lookup API
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
mailboxlayer API - Mailboxlayer is a free, simple and powerful JSON API offering instant email address validation & verification via syntax checks, typo and spelling checks, SMTP checks, free and disposable provider filtering, and much more.