API Pagination Filtering Sorting¶

Executive Summary¶

API Pagination Filtering Sorting defines standards for list and search-style API responsibilities. APIs must support predictable pagination, filtering, and sorting where collections can grow.

Why This Exists¶

Mobile, web, analytics, and integration consumers need reliable collection handling. Without standards, APIs become inconsistent, inefficient, and difficult to secure or optimize.

Owner¶

The owner is the Chief Product Officer and Enterprise Architect.

Business Value¶

Consistent collection behavior improves mobile performance, reduces client complexity, and protects backend resources.

Collection Query Model¶

flowchart LR
    Client[Client]
    Query[List or Search Query]
    Filter[Filtering]
    Sort[Sorting]
    Page[Pagination]
    Result[Stable Result Page]

    Client --> Query
    Query --> Filter
    Filter --> Sort
    Sort --> Page
    Page --> Result

Pagination Rules¶

Rule	Requirement
Paginate growing collections	Any collection that can grow beyond small fixed size must support pagination.
Use stable ordering	Paginated results require deterministic ordering.
Return pagination metadata	Responses should include enough metadata for clients to request adjacent pages.
Protect maximum page size	APIs must enforce safe limits.
Mobile-first defaults	Defaults should suit mobile network and rendering constraints.
Avoid unbounded exports	Bulk export is a separate governed capability, not normal pagination.

Filtering Rules¶

Rule	Requirement
Filters are explicit	Supported filters must be documented in future OpenAPI contracts.
Filters use domain language	Filter names should reflect business meaning.
Unauthorized filters are rejected	Clients cannot filter on hidden or unauthorized fields.
Tenant scope is implicit and enforced	Tenant filtering is enforced by API security, not optional client input.
Organization context is validated	Organization-scoped filters must match authorized organization context.

Sorting Rules¶

Rule	Requirement
Sort fields are allowlisted	APIs only support approved sort fields.
Sort behavior is deterministic	Equal values need stable secondary ordering where required.
Sorts preserve authorization	Sorting must not reveal hidden records or unauthorized fields.
Defaults are defined	Each collection API should have a predictable default sort.

Non-Implementation Boundary¶

This document does not define parameter names, cursor format, offset strategy, search syntax, index design, or endpoint-specific filters.