API Request

Overview

An API request is a structured message a client sends to an API to retrieve data, submit information, or invoke an operation. An API Request is the structured invocation sent by a client, including operation, credentials, parameters, headers, and body; it is separate from execution and response. Its exact representation and constraints follow the protocol and API contract, not merely the client programming language. Clients should validate and canonicalize data, use protected transport, set content type and timeouts, and avoid logging secrets. Duplicate delivery, ambiguous serialization, oversized payloads, stale preconditions, untrusted URLs, and missing idempotency can cause security or correctness problems even when parsing succeeds. The API Request contract should define identifiers, validation, authorization, status semantics, errors, limits, and version behavior at the same boundary.

Servers should authenticate, authorize, constrain size and complexity, validate schemas and business rules, and return structured outcomes with correlation information. An API defines a contract, an SDK wraps that contract, an integration coordinates systems, and an operation changes domain state; those layers can fail independently. A request identifies the target and operation and may include headers, authentication, path values, query parameters, and a body.

Offset pagination alone can miss or repeat records when the underlying dataset changes during traversal. Valid syntax does not mean authorized or meaningful intent. Custom themes, extensions, caching, and background jobs can alter behavior, so supported versions and customization boundaries need explicit tests. Observability for API Request should record operation, version, principal, request ID, latency, retry count, error code, and final state without exposing secrets.