REST API
A REST API (Representational State Transfer Application Programming Interface) is a web service that uses standard HTTP methods to allow software systems to communicate by exchanging data —…
A REST API (Representational State Transfer Application Programming Interface) is a web service that uses standard HTTP methods to allow software systems to communicate by exchanging data — typically in JSON format — over the internet.
What Is a REST API?
A REST API is a type of web API built on REST architectural principles. REST (Representational State Transfer) is a set of constraints for building scalable web services defined by Roy Fielding in his 2000 doctoral dissertation.
A REST API exposes resources — data entities like customers, orders, or products — at specific URLs (endpoints). Clients interact with those resources using standard HTTP methods. Responses typically return data in JSON format.
How REST APIs Work
When a client application needs data from another system, it sends an HTTP request to a REST API endpoint. The API processes the request and returns a response.
The four primary HTTP methods used in REST:
A typical API request to retrieve a HubSpot contact looks like: GET https://api.hubspot.com/crm/v3/objects/contacts/12345. The API returns a JSON object with the contact's properties.
Why REST Is the Standard for Enterprise Integration
REST APIs are the dominant integration standard in enterprise software because every major SaaS platform — HubSpot, Salesforce, Stripe, Zendesk, Workday, SAP — exposes a REST API. Enterprise integration teams rely on REST's universality, debuggability, and stateless scalability.
REST's stateless design means each request contains all the information needed to process it. Servers don't maintain session state between requests, which makes REST APIs horizontally scalable and resilient.
| REST | GraphQL | gRPC | |
|---|---|---|---|
| Data fetching | Fixed endpoints, fixed response shape | Flexible queries, client specifies fields | Fixed methods, binary protocol |
| Performance | Good | Good (reduces over-fetching) | Excellent (low latency) |
| Learning curve | Low | Medium | High |
| Ecosystem | Universal | Wide | Growing |
| Best for | External integrations, SaaS | Complex data requirements, mobile | Internal microservices |
REST API Integration at Dbugger
Dbugger builds REST API integrations for enterprise clients — connecting HubSpot, AEM, ERPs, billing platforms, and custom internal systems. Our integrations include full error handling, rate limit management, observability, and OWASP-secure authentication implementation.
Related terms: API Gateway · Webhook · WebSocket · GraphQL · OAuth · Rate Limiting
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