Reference

This reference documents every public symbol exported from quater.

Prerequisites

Use this section after reading Quickstart and Public API. The reference tells you exact names and defaults; the guides show how to design an app.

Public Imports

from quater import Quater, Request, JSONResponse, Resource

Public symbols:

Area	Symbols
Application	Quater, RouteGroup, AppConfig, CORSConfig, __version__
Parameters	Path, Query, Body, Form, File, Header, Cookie
Request	Request, State, FormData, UploadFile
Resources	Resource
Responses	Response, JSONResponse, TextResponse, HTMLResponse, BytesResponse, StreamResponse, RedirectResponse, EmptyResponse
Auth	AuthRequest, AuthContext, ApprovalRequest, ActionApproval, HTTPError, ImproperlyConfigured, SignedCookieSigner
Observability	AccessLogEvent, AccessLogHook, ToolAuditEvent
Testing	TestClient, MCPTestClient, TestResponse

Pages

• Application: app construction, route groups, CORS, and server-facing objects.
• Parameters: request binding markers.
• Request: request object, state, headers, query, cookies, and context.
• Resources: request-scoped injection.
• Responses: automatic return conversion and explicit responses.
• Auth and Security: auth hooks, approval hooks, errors, and signed cookies.
• Observability: access-log and MCP audit events.
• Testing: in-process HTTP and MCP test clients.

What Can Go Wrong

If a symbol does not appear here, do not treat it as public API. If application code needs an internal import, treat that as a design question before depending on it.

Also See

• Stability: import boundary rules during pre-release.
• Public API: human explanation before the reference.
• Quickstart: first working app.