> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tktchurch.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authorization endpoint

> API-first authorization entrypoint. PKCE S256 enforced; redirect_uri must be pre-registered; request_uri replays a PAR. Returns a JSON consent challenge, or 302 when the client sets login_page_url.



## OpenAPI

````yaml /api-reference/openapi.json get /oauth/authorize
openapi: 3.0.1
info:
  title: TKTChurch Identity (TKTAuth)
  version: v1
  description: >-
    Authorization server at prod-auth.tktchurch.com. Public OAuth2/OIDC
    endpoints need no auth; /api/v1 self routes need a Bearer access token
    issued to the user. the listed resource:action permission. Management lists
    return `{ metadata: { total, page, per }, items: [...] }`.
servers:
  - url: https://prod-auth.tktchurch.com
    description: Production
  - url: http://localhost:8080
    description: Local backchannel
  - url: https://calendar.tktchurch.net
    description: Calendar (Events)
security: []
tags:
  - name: authentication
    description: >-
      OAuth2 (RFC 6749), PAR (9126), revocation/introspection (7009/7662),
      device flow (8628), OIDC, registration (7591), sign-in flows, password
      reset and federated identity.
  - name: users
    description: >-
      Signed-in profile, identities, recovery, membership and Member Pass.
      Bearer only.
  - name: membership
    description: Membership matching, Member Pass, invite claims and family join codes.
  - name: sessions
    description: List, inspect and revoke your own sessions. Bearer only.
  - name: security
    description: TOTP setup and passkey management. Bearer only.
  - name: consents-privacy
    description: Your consent grants, privacy notices, data requests and exports.
  - name: family
    description: >-
      Families, dependents and guardian delegation. Bearer; delegation needs
      guardian:act_as.
  - name: system
    description: Liveness, readiness, build info and public maintenance status.
  - name: events
    description: >-
      Public church events listing, search and detail on calendar.tktchurch.net.
      No auth.
paths:
  /oauth/authorize:
    get:
      tags:
        - authentication
      summary: Authorization endpoint
      description: >-
        API-first authorization entrypoint. PKCE S256 enforced; redirect_uri
        must be pre-registered; request_uri replays a PAR. Returns a JSON
        consent challenge, or 302 when the client sets login_page_url.
      operationId: authorize
      parameters:
        - name: response_type
          in: query
          required: true
          description: e.g. code
          schema:
            type: string
            example: code
        - name: client_id
          in: query
          required: true
          description: Public client id
          schema:
            type: string
            example: dev-console
        - name: redirect_uri
          in: query
          required: true
          description: Must be pre-registered
          schema:
            type: string
            example: https://developers.tktchurch.com/callback
        - name: scope
          in: query
          required: false
          description: Space-separated scopes
          schema:
            type: string
            example: openid profile email
        - name: state
          in: query
          required: false
          description: Opaque CSRF value
          schema:
            type: string
        - name: code_challenge
          in: query
          required: false
          description: S256 challenge
          schema:
            type: string
        - name: code_challenge_method
          in: query
          required: false
          description: Must be S256 — plain is rejected
          schema:
            type: string
            example: S256
        - name: nonce
          in: query
          required: false
          description: OIDC nonce
          schema:
            type: string
        - name: request_uri
          in: query
          required: false
          description: PAR replay
          schema:
            type: string
        - name: resource
          in: query
          required: false
          description: RFC 8707 resource indicator
          schema:
            type: string
      responses:
        '200':
          description: JSON consent challenge, or 302 redirect to the login page
        '302':
          description: Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
              example:
                error: invalid_request
                error_description: Redirect URI not registered for this client
      security: []
components:
  schemas:
    Error:
      type: object
      required:
        - error
        - error_description
      properties:
        error:
          type: string
          description: Machine-readable code
        error_description:
          type: string
          description: Human-readable detail

````