IT Glossary
What is a REST API?
The web's most widespread API style: data is requested and sent over simple HTTP addresses — like web pages made for programs.
If an API is the socket through which programs talk, REST is the socket shape that won the internet. A REST API exposes data as web addresses: just as your browser asks for /contact, a program asks for /orders/1234 and receives that order back in a structured format, usually JSON. That simplicity — the same mechanics the web has run on for three decades — explains why couriers, payment processors, banks and tax authorities all publish their services as REST APIs. When you're evaluating software, the “REST” label is good news: it means standard technology that any development team can integrate without exotic tooling, which translates into cheaper integrations and less dependence on a single vendor. Modern alternatives such as GraphQL and gRPC have their niches, but REST remains the lingua franca of business integrations.
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Why it matters for your business
A standard everyone speaks
Every web developer has worked with REST — your integration never hinges on rare specialists or a vendor's proprietary toolkit.
Simple to test and debug
REST requests can be inspected with free tools, which shortens the diagnosis whenever an integration starts behaving oddly.
Runs over any infrastructure
Because it is built on HTTP, a REST API passes through firewalls and proxies like ordinary web traffic — no special network setup required.
Frequently asked questions
Are REST and JSON the same thing?
No: REST is the style of the conversation (how requests are phrased), JSON is the format of the data in the reply. Most REST APIs use JSON, but they can also return XML or other formats.
What are rate limits on a REST API?
The provider caps how many requests you can make per minute to protect its servers; a well-written integration respects the cap and automatically retries refused calls — a detail that separates robust integrations from ones that fail at random.
How is a REST API secured?
Through mandatory HTTPS plus access keys or tokens sent with every request; those keys are the equivalent of company passwords — kept secret, rotated regularly, and never placed in your website's public code.
Let’s talk about your project
Message us on WhatsApp or send an email — you talk directly to a developer.
office@northdan.com · +40 752 070 247