Quick Reference
API Reference
160+ Terms Explained
A comprehensive glossary of REST API terminology. Each term includes clear definitions, code examples, and security notes where applicable. Perfect for quick lookups.
160+
Terms
10
Categories
95
Security Notes
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}Code Examples
Every term includes working code you can use directly
Security Notes
Security considerations where applicable to the term
RFC References
Links to official standards and specifications
Quick Search
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Browse by Category
10 categories covering all aspects of API design and development
Fundamentals
37 terms2xx Success Status Codes
401 Unauthorized vs 403 Forbidden
404 Not Found vs 410 Gone
429 Too Many Requests
4xx Client Error Status Codes
5xx Server Error Status Codes
Accept Header
Client-Server Architecture
Content-Type Header
DELETE Method
GET Method
HATEOAS (Hypermedia as the Engine of Application State)
HTTP Headers
HTTP Methods
HTTP Request
HTTP Response
HTTP Status Codes
Hypermedia
Idempotency
OPTIONS Method
PATCH Method
POST Method
PUT Method
Representation
Resource
REST
RESTful API
RPC
Safe Methods
SOAP
Statelessness
Uniform Interface
Unsafe Methods
URI vs URL vs URN
Versioning
Webhooks
YAML
Protocols & Transport
16 termsAuthorization
8 termsData & Pagination
5 termsLifecycle & Versioning
13 termsInfrastructure
14 termsStandards & Specifications
25 termsEnterprise Patterns
10 termsAI & Modern APIs
8 termsWant to Learn In-Depth?
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