mitbringsl/docs/API.md

Mitbringsl – REST API Specification

Base URL: / Authentication: Bearer Token via Authorization: Bearer <session_token> header or session cookie.

---

Health & Diagnostics

GET /healthz

Liveness probe. Returns HTTP 200 OK.

GET /readyz

Readiness probe. Checks PostgreSQL connection pool health.

• 200 OK: Database reachable.
• 503 Service Unavailable: Database error.

---

Authentication (/auth)

POST /auth/register

Create a new email/password account.

• Request:

  { "email": "user@example.com", "password": "secretpassword", "display_name": "Max" }
  

• Response (201 Created):

  {
    "token": "<opaque_session_token>",
    "expires_at": "2026-09-04T20:00:00Z",
    "user": { "id": "<uuid>", "email": "user@example.com", "display_name": "Max" }
  }
  

POST /auth/login

Authenticate with email/password.

• Request:

  { "email": "user@example.com", "password": "secretpassword" }
  

• Response (200 OK): Same shape as register.

POST /auth/oidc

Authenticate via Google or custom OpenID Connect provider.

• Request:

  { "provider": "google", "id_token": "<jwt>" }
  

• Response (200 OK): Same shape as login.

POST /auth/logout

Revoke active session token. Returns 204 No Content.

---

Lists (/api/lists)

All list endpoints return 404 Not Found when the authenticated user is neither owner nor member of the list (no membership leaks), and 401 without a valid session. List responses carry an invite_code (8 characters) for sharing.

GET /api/lists

Fetch all active (non-deleted) lists the authenticated user owns or joined as a member.

• Response (200 OK):

  {
    "lists": [
      { "id": "<uuid>", "name": "Wocheneinkauf", "invite_code": "A1B2C3D4", "updated_at": "2026-08-05T19:00:00Z", "hlc_ts": 177000000000000 }
    ]
  }
  

POST /api/lists

Create a new list. The owner is automatically added to list_members (role owner) and an invite code is generated.

• Request: { "name": "Supermarkt" }
• Response (201 Created): { "id": "<uuid>", "name": "Supermarkt", "invite_code": "A1B2C3D4", ... }

GET /api/lists/{id}

Fetch list detail including items (owner or member only).

• Response (200 OK):

  {
    "id": "<uuid>",
    "name": "Wocheneinkauf",
    "invite_code": "A1B2C3D4",
    "updated_at": "...",
    "hlc_ts": 177000000000000,
    "items": [
      { "id": "<uuid>", "name": "Milch", "quantity": "1L", "checked": false, "hlc_ts": 177000000000001 }
    ]
  }
  

POST /api/lists/{id}/invite

Return the invite code of a list (owner or member only). Generates a code on the fly for legacy lists without one.

• Request: empty JSON object {}
• Response (200 OK): { "invite_code": "A1B2C3D4" }

POST /api/lists/join

Join a shared list using its invite code (case-insensitive). Joining again is idempotent; the existing membership role is kept (an owner cannot be demoted).

• Request: { "invite_code": "a1b2c3d4" }
• Response (200 OK): the joined list (same shape as GET /api/lists items).
• 400 Bad Request: unknown or empty invite code.

---

Sync & Ops (/api/lists/{id}/ops)

Both endpoints require membership (owner or member); otherwise 404 Not Found.

POST /api/lists/{id}/ops

Push a batch of client operations (max 100).

• Request:

  {
    "client_id": "<client_uuid>",
    "ops": [
      {
        "client_seq": 1,
        "op_type": "item_add",
        "target_id": "<item_uuid>",
        "hlc_ts": 177000000000000,
        "payload": { "name": "Brot", "quantity": "1 Stück" }
      }
    ]
  }
  

• Response (200 OK):

  {
    "results": [
      { "client_seq": 1, "seq": 42, "hlc_ts": 177000000000001 }
    ]
  }
  

GET /api/lists/{id}/ops?since={seq}

Pull operations since server sequence since.

• Response (200 OK):

  {
    "ops": [
      {
        "seq": 42,
        "client_id": "<client_uuid>",
        "op_type": "item_add",
        "target_id": "<item_uuid>",
        "payload": { "name": "Brot" },
        "client_seq": 1,
        "hlc_ts": 177000000000001,
        "created_at": "2026-08-05T20:00:00Z"
      }
    ],
    "has_more": false
  }
  

---

Suggestions (/api/suggestions)

GET /api/suggestions?q={query}

Fuzzy autocomplete search for item names (pg_trgm).

• Response (200 OK):

  { "suggestions": ["milch", "mineralwasser", "müsli"] }