Glossary

30 API terms, each answered in under two minutes. Entries are organized by concept:

• Styles — REST, resource, endpoint, GraphQL, gRPC, Protocol Buffers, HTTP/2
• Schema & Query — schema, query, mutation, subscription, resolver, OpenAPI/Swagger
• Real-time — WebSocket, SSE, long polling
• Authentication — API key, OAuth, JWT, bearer token
• Reliability — rate limiting, token bucket, idempotency, CORS, content negotiation
• Data Access — pagination, cursor, webhook, API gateway, HATEOAS

Every term links back to the lesson where it is introduced. Start with any entry or work through the lessons in order.