diff --git a/docs/api/README.md b/docs/api/README.md
index c40eacb..06b50bf 100644
--- a/docs/api/README.md
+++ b/docs/api/README.md
@@ -184,6 +184,7 @@ Generated from `@openapi` annotations in [`src/api/routes/`](../../src/api/route
 | [`routes/unit/list.md`](routes/unit/list.md) | `GET /unit` |
 | [`routes/unit/upsert.md`](routes/unit/upsert.md) | `PUT /unit` |
 | [`routes/pos/client.md`](routes/pos/client.md) | `GET /v1/client` |
+| [`routes/pos/init.md`](routes/pos/init.md) | `GET /v1/init` |
 | [`routes/warehouse/list.md`](routes/warehouse/list.md) | `GET /warehouse` |
 | [`routes/warehouse/create.md`](routes/warehouse/create.md) | `POST /warehouse` |
 | [`routes/warehouse/order.md`](routes/warehouse/order.md) | `PUT /warehouse/order` |
diff --git a/docs/api/openapi.json b/docs/api/openapi.json
index 7326da5..73eb382 100644
--- a/docs/api/openapi.json
+++ b/docs/api/openapi.json
@@ -8804,7 +8804,7 @@
           "Category"
         ],
         "summary": "Articles in category",
-        "description": "Returns articles in a category the user is authorized for.",
+        "description": "Returns articles in a category the user is authorized for (omits child articles of a father article). Each article includes `childCount` (the number of its child articles).",
         "security": [
           {
             "cookieAuth": []
@@ -8834,6 +8834,62 @@
                       "type": "array",
                       "items": {
                         "type": "object",
+                        "properties": {
+                          "id": {
+                            "type": "integer"
+                          },
+                          "sku": {
+                            "type": "string"
+                          },
+                          "name": {
+                            "type": "string"
+                          },
+                          "slug": {
+                            "type": "string"
+                          },
+                          "net": {
+                            "type": "number",
+                            "nullable": true
+                          },
+                          "taxRate": {
+                            "type": "number",
+                            "nullable": true
+                          },
+                          "track_stock": {
+                            "type": "boolean"
+                          },
+                          "optionsCount": {
+                            "type": "integer"
+                          },
+                          "articleListCount": {
+                            "type": "integer"
+                          },
+                          "childCount": {
+                            "type": "integer",
+                            "description": "Number of child articles belonging to this article"
+                          },
+                          "fullHash": {
+                            "type": "string",
+                            "nullable": true
+                          },
+                          "thumbW": {
+                            "type": "integer",
+                            "nullable": true
+                          },
+                          "thumbH": {
+                            "type": "integer",
+                            "nullable": true
+                          },
+                          "thumbHash": {
+                            "type": "string",
+                            "nullable": true
+                          },
+                          "brand": {
+                            "type": "object",
+                            "nullable": true,
+                            "additionalProperties": true
+                          }
+                        },
                         "additionalProperties": true
                       }
                     }
@@ -13016,7 +13072,7 @@
       },
       "put": {
         "summary": "Set Stückliste (bundle items) for an article",
-        "description": "Configures the article as a Stückliste covering a list of count * article. An article that is a father or has options cannot be a Stückliste. Pass an empty array to remove the Stückliste.",
+        "description": "Configures the article as a Stückliste covering a list of count * article. A father article cannot be a Stückliste. Can be combined with options. Pass an empty array to remove the Stückliste.",
         "tags": [
           "Article"
         ],
@@ -13172,7 +13228,7 @@
       },
       "put": {
         "summary": "Set options list for an article",
-        "description": "Configures options for an article. Some options can be mandated (come with the article in any case). An article that is a father or a Stückliste cannot have options. Pass an empty array to remove options.",
+        "description": "Configures options for an article. Some options can be mandated (come with the article in any case). A father article cannot have options. Can be combined with a Stückliste. Pass an empty array to remove options.",
         "tags": [
           "Article"
         ],
@@ -13520,6 +13576,164 @@
         }
       }
     },
+    "/v1/init": {
+      "get": {
+        "tags": [
+          "POS"
+        ],
+        "summary": "POS sync initialization counts",
+        "description": "Returns entity change counts since the provided `lastChanged*` unix timestamp cursors\nfor the authenticated POS terminal (`Authorization: Bearer <authToken>`).\n",
+        "x-markdown": "pos/init.md",
+        "parameters": [
+          {
+            "in": "header",
+            "name": "Authorization",
+            "required": true,
+            "schema": {
+              "type": "string"
+            },
+            "description": "POS device authToken obtained during pairing (`Bearer <token>` or `<token>`)",
+            "example": "Bearer c30099b66ec1fcb9ccd05795423c94e8"
+          },
+          {
+            "in": "query",
+            "name": "lastChangedProduct",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "default": 0
+            },
+            "description": "Unix timestamp of last synced product update",
+            "example": 0
+          },
+          {
+            "in": "query",
+            "name": "lastChangedCategory",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "default": 0
+            },
+            "description": "Unix timestamp of last synced category update",
+            "example": 0
+          },
+          {
+            "in": "query",
+            "name": "lastChangedCustomer",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "default": 0
+            },
+            "description": "Unix timestamp of last synced customer update",
+            "example": 0
+          },
+          {
+            "in": "query",
+            "name": "lastChangedCustomerGroup",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "default": 0
+            },
+            "description": "Unix timestamp of last synced customer group update",
+            "example": 0
+          },
+          {
+            "in": "query",
+            "name": "lastChangedCompositeProduct",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "default": 0
+            },
+            "description": "Unix timestamp of last synced composite product update",
+            "example": 0
+          },
+          {
+            "in": "query",
+            "name": "lastChangedDeletedEntity",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "default": 0
+            },
+            "description": "Unix timestamp of last synced deleted entity",
+            "example": 0
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Sync initialization counts",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object",
+                  "properties": {
+                    "version": {
+                      "type": "string",
+                      "example": "1.10.12.0"
+                    },
+                    "product_count": {
+                      "type": "string",
+                      "example": "19"
+                    },
+                    "category_count": {
+                      "type": "string",
+                      "example": "4"
+                    },
+                    "customer_count": {
+                      "type": "string",
+                      "example": "0"
+                    },
+                    "customerGroup_count": {
+                      "type": "string",
+                      "example": "1"
+                    },
+                    "compositeProduct_count": {
+                      "type": "string",
+                      "example": "0"
+                    },
+                    "configurationGroup_count": {
+                      "type": "string",
+                      "example": "0"
+                    },
+                    "configurationItem_count": {
+                      "type": "string",
+                      "example": "0"
+                    },
+                    "deletedEntity_count": {
+                      "type": "string",
+                      "example": "0"
+                    },
+                    "max_orderId_count": {
+                      "type": "string",
+                      "example": "0"
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Missing or invalid POS Authorization token",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object",
+                  "properties": {
+                    "Message": {
+                      "type": "string",
+                      "example": "Authorization has been denied for this request."
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/v1/client": {
       "get": {
         "tags": [
diff --git a/docs/api/routes/article/_sku/articlelist.put.md b/docs/api/routes/article/_sku/articlelist.put.md
index 57a49c5..da64330 100644
--- a/docs/api/routes/article/_sku/articlelist.put.md
+++ b/docs/api/routes/article/_sku/articlelist.put.md
@@ -4,7 +4,7 @@ Protected. Requires a valid session cookie (`credentials: 'include'`).
 
 Set Stückliste (bundle items) for an article
 
-Configures the article as a Stückliste covering a list of count * article. An article that is a father or has options cannot be a Stückliste. Pass an empty array to remove the Stückliste.
+Configures the article as a Stückliste covering a list of count * article. A father article cannot be a Stückliste. Can be combined with options. Pass an empty array to remove the Stückliste.
 
 ## Path parameters
 
diff --git a/docs/api/routes/article/_sku/optionslist.put.md b/docs/api/routes/article/_sku/optionslist.put.md
index b90a82b..a341510 100644
--- a/docs/api/routes/article/_sku/optionslist.put.md
+++ b/docs/api/routes/article/_sku/optionslist.put.md
@@ -4,7 +4,7 @@ Protected. Requires a valid session cookie (`credentials: 'include'`).
 
 Set options list for an article
 
-Configures options for an article. Some options can be mandated (come with the article in any case). An article that is a father or a Stückliste cannot have options. Pass an empty array to remove options.
+Configures options for an article. Some options can be mandated (come with the article in any case). A father article cannot have options. Can be combined with a Stückliste. Pass an empty array to remove options.
 
 ## Path parameters
 
diff --git a/docs/api/routes/category/articles.md b/docs/api/routes/category/articles.md
index f6b1cec..cf990b9 100644
--- a/docs/api/routes/category/articles.md
+++ b/docs/api/routes/category/articles.md
@@ -4,7 +4,7 @@ Protected. Requires a valid session cookie (`credentials: 'include'`).
 
 Articles in category
 
-Returns articles in a category the user is authorized for.
+Returns articles in a category the user is authorized for (omits child articles of a father article). Each article includes `childCount` (the number of its child articles).
 
 ## Path parameters
 
@@ -19,7 +19,23 @@ Articles list
 ```json
 {
   "articles": [
-    {}
+    {
+      "id": 1,
+      "sku": "…",
+      "name": "…",
+      "slug": "…",
+      "net": 1,
+      "taxRate": 1,
+      "track_stock": true,
+      "optionsCount": 1,
+      "articleListCount": 1,
+      "childCount": 1,
+      "fullHash": "…",
+      "thumbW": 1,
+      "thumbH": 1,
+      "thumbHash": "…",
+      "brand": {}
+    }
   ]
 }
 ```
diff --git a/docs/api/routes/pos/init.md b/docs/api/routes/pos/init.md
new file mode 100644
index 0000000..62ee4cc
--- /dev/null
+++ b/docs/api/routes/pos/init.md
@@ -0,0 +1,49 @@
+# `GET /v1/init`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+POS sync initialization counts
+
+Returns entity change counts since the provided `lastChanged*` unix timestamp cursors
+for the authenticated POS terminal (`Authorization: Bearer <authToken>`).
+
+
+## Query parameters
+
+| Param | Required | Type | Description |
+|-------|----------|------|-------------|
+| `lastChangedProduct` | no | integer | Unix timestamp of last synced product update |
+| `lastChangedCategory` | no | integer | Unix timestamp of last synced category update |
+| `lastChangedCustomer` | no | integer | Unix timestamp of last synced customer update |
+| `lastChangedCustomerGroup` | no | integer | Unix timestamp of last synced customer group update |
+| `lastChangedCompositeProduct` | no | integer | Unix timestamp of last synced composite product update |
+| `lastChangedDeletedEntity` | no | integer | Unix timestamp of last synced deleted entity |
+
+## Response `200`
+
+Sync initialization counts
+
+```json
+{
+  "version": "1.10.12.0",
+  "product_count": "19",
+  "category_count": "4",
+  "customer_count": "0",
+  "customerGroup_count": "1",
+  "compositeProduct_count": "0",
+  "configurationGroup_count": "0",
+  "configurationItem_count": "0",
+  "deletedEntity_count": "0",
+  "max_orderId_count": "0"
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 401 | Missing or invalid POS Authorization token |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._
diff --git a/quixpos2jtl b/quixpos2jtl
new file mode 160000
index 0000000..a0a2e8d
--- /dev/null
+++ b/quixpos2jtl
@@ -0,0 +1 @@
+Subproject commit a0a2e8d87f68ced946b993130f5ef690915fcb44
diff --git a/src/api/middleware/logger.js b/src/api/middleware/logger.js
index e36a865..3a5ea51 100644
--- a/src/api/middleware/logger.js
+++ b/src/api/middleware/logger.js
@@ -55,6 +55,9 @@ export const loggerMiddleware = (req, res, next) => {
         if (req.headers['content-type']) {
             console.log(chalk.gray('  content-type:'), chalk.cyan(req.headers['content-type']));
         }
+        if (req.headers.authorization) {
+            console.log(chalk.gray('  authorization:'), chalk.cyan(req.headers.authorization));
+        }
         logField('body', req.body ?? {}, { skipEmpty: true });
         logField('response', getBody());
 
diff --git a/src/api/routes/article.js b/src/api/routes/article.js
index a883634..67e4c9c 100644
--- a/src/api/routes/article.js
+++ b/src/api/routes/article.js
@@ -1997,7 +1997,7 @@ export function register(app, basePath = '') {
      * /article/{sku}/articlelist:
      *   put:
      *     summary: Set Stückliste (bundle items) for an article
-     *     description: Configures the article as a Stückliste covering a list of count * article. An article that is a father or has options cannot be a Stückliste. Pass an empty array to remove the Stückliste.
+     *     description: Configures the article as a Stückliste covering a list of count * article. A father article cannot be a Stückliste. Can be combined with options. Pass an empty array to remove the Stückliste.
      *     tags:
      *       - Article
      *     security:
@@ -2135,7 +2135,7 @@ export function register(app, basePath = '') {
      * /article/{sku}/optionslist:
      *   put:
      *     summary: Set options list for an article
-     *     description: Configures options for an article. Some options can be mandated (come with the article in any case). An article that is a father or a Stückliste cannot have options. Pass an empty array to remove options.
+     *     description: Configures options for an article. Some options can be mandated (come with the article in any case). A father article cannot have options. Can be combined with a Stückliste. Pass an empty array to remove options.
      *     tags:
      *       - Article
      *     security:
diff --git a/src/api/routes/category.js b/src/api/routes/category.js
index 5b6e07b..7ff8a57 100644
--- a/src/api/routes/category.js
+++ b/src/api/routes/category.js
@@ -292,7 +292,7 @@ export function register(app, basePath = '') {
      *   get:
      *     tags: [Category]
      *     summary: Articles in category
-     *     description: Returns articles in a category the user is authorized for.
+     *     description: Returns articles in a category the user is authorized for (omits child articles of a father article). Each article includes `childCount` (the number of its child articles).
      *     security:
      *       - cookieAuth: []
      *     x-markdown: category/articles.md
@@ -315,6 +315,46 @@ export function register(app, basePath = '') {
      *                   type: array
      *                   items:
      *                     type: object
+     *                     properties:
+     *                       id:
+     *                         type: integer
+     *                       sku:
+     *                         type: string
+     *                       name:
+     *                         type: string
+     *                       slug:
+     *                         type: string
+     *                       net:
+     *                         type: number
+     *                         nullable: true
+     *                       taxRate:
+     *                         type: number
+     *                         nullable: true
+     *                       track_stock:
+     *                         type: boolean
+     *                       optionsCount:
+     *                         type: integer
+     *                       articleListCount:
+     *                         type: integer
+     *                       childCount:
+     *                         type: integer
+     *                         description: Number of child articles belonging to this article
+     *                       fullHash:
+     *                         type: string
+     *                         nullable: true
+     *                       thumbW:
+     *                         type: integer
+     *                         nullable: true
+     *                       thumbH:
+     *                         type: integer
+     *                         nullable: true
+     *                       thumbHash:
+     *                         type: string
+     *                         nullable: true
+     *                       brand:
+     *                         type: object
+     *                         nullable: true
+     *                         additionalProperties: true
      *                     additionalProperties: true
      *       400:
      *         description: Invalid id
@@ -342,7 +382,13 @@ export function register(app, basePath = '') {
         }
 
         try {
-            const articles = await db.getCategoryArticles(req.user.id, parsed.id);
+            const allArticles = await db.getCategoryArticles(req.user.id, parsed.id);
+            const articles = allArticles
+                .filter((a) => a.fatherArticleId == null)
+                .map((a) => ({
+                    ...a,
+                    childCount: Number(a.childCount ?? 0),
+                }));
             res.status(200).json({ articles });
         } catch (error) {
             const status = categoryErrorStatus(error);
diff --git a/src/db/posterminal.js b/src/db/posterminal.js
index 3d592ac..66b84b0 100644
--- a/src/db/posterminal.js
+++ b/src/db/posterminal.js
@@ -40,7 +40,48 @@ export async function findByPairingpin(pairingpin) {
     return store.posterminal.findByPairingpin(pairingpin);
 }
 
+export async function findByToken(token) {
+    const store = await getStore();
+    return store.posterminal.findByToken(token);
+}
+
 export async function pair(id, data) {
     const store = await getStore();
     return store.posterminal.pair(id, data);
 }
+
+export async function getProductCount(params) {
+    const store = await getStore();
+    return store.posterminal.getProductCount(params);
+}
+
+export async function getCategoryCount(params) {
+    const store = await getStore();
+    return store.posterminal.getCategoryCount(params);
+}
+
+export async function getCustomerCount(params) {
+    const store = await getStore();
+    return store.posterminal.getCustomerCount(params);
+}
+
+export async function getCustomerGroupCount(params) {
+    const store = await getStore();
+    return store.posterminal.getCustomerGroupCount(params);
+}
+
+export async function getCompositeProductCount(params) {
+    const store = await getStore();
+    return store.posterminal.getCompositeProductCount(params);
+}
+
+export async function getDeletedEntityCount(params) {
+    const store = await getStore();
+    return store.posterminal.getDeletedEntityCount(params);
+}
+
+export async function getMaxOrderIdCount(params) {
+    const store = await getStore();
+    return store.posterminal.getMaxOrderIdCount(params);
+}
+
diff --git a/src/v1/index.js b/src/v1/index.js
index 3b6bb33..0c31687 100644
--- a/src/v1/index.js
+++ b/src/v1/index.js
@@ -1,9 +1,15 @@
 import { Router } from 'express';
+import { posAuthMiddleware } from './middleware/posAuth.js';
 import { handleClient } from './routes/client.js';
+import { handleInit } from './routes/init.js';
 
 const router = Router();
 
 // POS discovery and pairing
 router.get('/client', handleClient);
 
+// POS sync initialization counts
+router.get('/init', posAuthMiddleware, handleInit);
+
 export default router;
+
diff --git a/src/v1/middleware/posAuth.js b/src/v1/middleware/posAuth.js
new file mode 100644
index 0000000..465c3ac
--- /dev/null
+++ b/src/v1/middleware/posAuth.js
@@ -0,0 +1,66 @@
+import chalk from 'chalk';
+import * as db from '../../db/posterminal.js';
+
+export function extractPosToken(req) {
+    const authHeader = req.headers.authorization;
+    if (typeof authHeader === 'string' && authHeader.trim()) {
+        const trimmed = authHeader.trim();
+        if (/^Bearer\s+/i.test(trimmed)) {
+            return trimmed.replace(/^Bearer\s+/i, '').trim();
+        }
+        if (/^Basic\s+/i.test(trimmed)) {
+            const b64 = trimmed.replace(/^Basic\s+/i, '').trim();
+            try {
+                const decoded = Buffer.from(b64, 'base64').toString('utf8');
+                const parts = decoded.split(':');
+                return (parts[1] || parts[0] || '').trim();
+            } catch {
+                return b64;
+            }
+        }
+        return trimmed;
+    }
+
+    for (const key of ['x-auth-token', 'authtoken', 'auth-token', 'token', 'x-token']) {
+        const val = req.headers[key];
+        if (typeof val === 'string' && val.trim()) {
+            return val.trim();
+        }
+    }
+
+    const queryToken = req.query?.authToken || req.query?.token;
+    if (typeof queryToken === 'string' && queryToken.trim()) {
+        return queryToken.trim();
+    }
+
+    return '';
+}
+
+/**
+ * Verifies the POS terminal token from the Authorization header and attaches
+ * `req.posterminal`.
+ * @param {import('express').Request} req
+ * @param {import('express').Response} res
+ * @param {import('express').NextFunction} next
+ */
+export async function posAuthMiddleware(req, res, next) {
+    const token = extractPosToken(req);
+    if (!token) {
+        console.log(chalk.yellow('  [posAuth] No token found in headers:'), req.headers);
+        return res.status(401).json({ Message: 'Authorization has been denied for this request.' });
+    }
+
+    try {
+        const terminal = await db.findByToken(token);
+        if (!terminal) {
+            console.log(chalk.yellow(`  [posAuth] Unknown token "${token}", headers:`), req.headers);
+            return res.status(401).json({ Message: 'Authorization has been denied for this request.' });
+        }
+
+        req.posterminal = terminal;
+        next();
+    } catch (err) {
+        console.error('POS auth error:', err);
+        return res.status(500).json({ Message: 'Internal server error' });
+    }
+}
diff --git a/src/v1/routes/client.js b/src/v1/routes/client.js
index d8ac038..1c95973 100644
--- a/src/v1/routes/client.js
+++ b/src/v1/routes/client.js
@@ -2,6 +2,7 @@ import crypto from 'node:crypto';
 import * as db from '../../db/posterminal.js';
 import { getCompanyById } from '../../db/company.js';
 import { getCertMetadata } from '../../util/cert.js';
+import { emit } from '../../api/sse.js';
 
 export function serverTimestamp() {
     const d = new Date();
@@ -166,6 +167,10 @@ export async function handleClient(req, res) {
                     pairedAt,
                 });
 
+                if (terminal.companyId) {
+                    emit('posterminal', { companyId: terminal.companyId });
+                }
+
                 let mandantName = process.env.MANDANT_NAME || 'eB-Standard';
                 let mandantDatabase = process.env.MANDANT_DATABASE || 'eazybusiness';
                 let mandantId = String(terminal.companyId || process.env.MANDANT_ID || '1');
diff --git a/src/v1/routes/init.js b/src/v1/routes/init.js
new file mode 100644
index 0000000..94b90c3
--- /dev/null
+++ b/src/v1/routes/init.js
@@ -0,0 +1,165 @@
+import * as db from '../../db/posterminal.js';
+
+/**
+ * @openapi
+ * /v1/init:
+ *   get:
+ *     tags: [POS]
+ *     summary: POS sync initialization counts
+ *     description: |
+ *       Returns entity change counts since the provided `lastChanged*` unix timestamp cursors
+ *       for the authenticated POS terminal (`Authorization: Bearer <authToken>`).
+ *     x-markdown: pos/init.md
+ *     parameters:
+ *       - in: header
+ *         name: Authorization
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: POS device authToken obtained during pairing (`Bearer <token>` or `<token>`)
+ *         example: "Bearer c30099b66ec1fcb9ccd05795423c94e8"
+ *       - in: query
+ *         name: lastChangedProduct
+ *         required: false
+ *         schema:
+ *           type: integer
+ *           default: 0
+ *         description: Unix timestamp of last synced product update
+ *         example: 0
+ *       - in: query
+ *         name: lastChangedCategory
+ *         required: false
+ *         schema:
+ *           type: integer
+ *           default: 0
+ *         description: Unix timestamp of last synced category update
+ *         example: 0
+ *       - in: query
+ *         name: lastChangedCustomer
+ *         required: false
+ *         schema:
+ *           type: integer
+ *           default: 0
+ *         description: Unix timestamp of last synced customer update
+ *         example: 0
+ *       - in: query
+ *         name: lastChangedCustomerGroup
+ *         required: false
+ *         schema:
+ *           type: integer
+ *           default: 0
+ *         description: Unix timestamp of last synced customer group update
+ *         example: 0
+ *       - in: query
+ *         name: lastChangedCompositeProduct
+ *         required: false
+ *         schema:
+ *           type: integer
+ *           default: 0
+ *         description: Unix timestamp of last synced composite product update
+ *         example: 0
+ *       - in: query
+ *         name: lastChangedDeletedEntity
+ *         required: false
+ *         schema:
+ *           type: integer
+ *           default: 0
+ *         description: Unix timestamp of last synced deleted entity
+ *         example: 0
+ *     responses:
+ *       200:
+ *         description: Sync initialization counts
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 version:
+ *                   type: string
+ *                   example: "1.10.12.0"
+ *                 product_count:
+ *                   type: string
+ *                   example: "19"
+ *                 category_count:
+ *                   type: string
+ *                   example: "4"
+ *                 customer_count:
+ *                   type: string
+ *                   example: "0"
+ *                 customerGroup_count:
+ *                   type: string
+ *                   example: "1"
+ *                 compositeProduct_count:
+ *                   type: string
+ *                   example: "0"
+ *                 configurationGroup_count:
+ *                   type: string
+ *                   example: "0"
+ *                 configurationItem_count:
+ *                   type: string
+ *                   example: "0"
+ *                 deletedEntity_count:
+ *                   type: string
+ *                   example: "0"
+ *                 max_orderId_count:
+ *                   type: string
+ *                   example: "0"
+ *       401:
+ *         description: Missing or invalid POS Authorization token
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 Message:
+ *                   type: string
+ *                   example: "Authorization has been denied for this request."
+ * @param {import('express').Request} req
+ * @param {import('express').Response} res
+ */
+export async function handleInit(req, res) {
+    const posterminalId = req.posterminal.id;
+
+    const productCursor = Number(req.query.lastChangedProduct) || 0;
+    const categoryCursor = Number(req.query.lastChangedCategory) || 0;
+    const customerCursor = Number(req.query.lastChangedCustomer) || 0;
+    const customerGroupCursor = Number(req.query.lastChangedCustomerGroup) || 0;
+    const compositeProductCursor = Number(req.query.lastChangedCompositeProduct) || 0;
+    const deletedEntityCursor = Number(req.query.lastChangedDeletedEntity) || 0;
+
+    try {
+        const [
+            productCount,
+            categoryCount,
+            customerCount,
+            customerGroupCount,
+            compositeProductCount,
+            deletedEntityCount,
+            maxOrderIdCount,
+        ] = await Promise.all([
+            db.getProductCount({ posterminalId, cursor: productCursor }),
+            db.getCategoryCount({ posterminalId, cursor: categoryCursor }),
+            db.getCustomerCount({ posterminalId, cursor: customerCursor }),
+            db.getCustomerGroupCount({ posterminalId, cursor: customerGroupCursor }),
+            db.getCompositeProductCount({ posterminalId, cursor: compositeProductCursor }),
+            db.getDeletedEntityCount({ posterminalId, cursor: deletedEntityCursor }),
+            db.getMaxOrderIdCount({ posterminalId }),
+        ]);
+
+        return res.status(200).json({
+            version: '1.10.12.0',
+            product_count: String(productCount),
+            category_count: String(categoryCount),
+            customer_count: String(customerCount),
+            customerGroup_count: String(customerGroupCount),
+            compositeProduct_count: String(compositeProductCount),
+            configurationGroup_count: '0',
+            configurationItem_count: '0',
+            deletedEntity_count: String(deletedEntityCount),
+            max_orderId_count: String(maxOrderIdCount),
+        });
+    } catch (err) {
+        console.error('POS /v1/init error:', err);
+        return res.status(500).json({ Message: 'Internal server error' });
+    }
+}