diff --git a/src/database/schemas/models.js b/src/database/schemas/models.js
index 1d7c3ed..0829ea4 100644
--- a/src/database/schemas/models.js
+++ b/src/database/schemas/models.js
@@ -38,6 +38,7 @@ import { shipmentModel } from './inventory/shipment.schema.js';
 import { invoiceModel } from './finance/invoice.schema.js';
 import { clientModel } from './sales/client.schema.js';
 import { salesOrderModel } from './sales/salesorder.schema.js';
+import { marketplaceModel } from './sales/marketplace.schema.js';
 
 // Map prefixes to models and id fields
 export const models = {
@@ -315,4 +316,11 @@ export const models = {
     label: 'Sales Order',
     referenceField: '_reference',
   },
+  MKT: {
+    model: marketplaceModel,
+    idField: '_id',
+    type: 'marketplace',
+    label: 'Marketplace',
+    referenceField: '_reference',
+  },
 };
diff --git a/src/database/schemas/sales/client.schema.js b/src/database/schemas/sales/client.schema.js
index 711ab6f..005c820 100644
--- a/src/database/schemas/sales/client.schema.js
+++ b/src/database/schemas/sales/client.schema.js
@@ -15,6 +15,7 @@ const clientSchema = new mongoose.Schema(
   {
     _reference: { type: String, default: () => generateId()() },
     name: { required: true, type: String },
+    marketplace: { type: mongoose.Schema.Types.ObjectId, ref: 'marketplace', required: false },
     email: { required: false, type: String },
     phone: { required: false, type: String },
     country: { required: false, type: String },
diff --git a/src/database/schemas/sales/marketplace.schema.js b/src/database/schemas/sales/marketplace.schema.js
new file mode 100644
index 0000000..17c9ce5
--- /dev/null
+++ b/src/database/schemas/sales/marketplace.schema.js
@@ -0,0 +1,26 @@
+import mongoose from 'mongoose';
+import { generateId } from '../../utils.js';
+
+const marketplaceSchema = new mongoose.Schema(
+  {
+    _reference: { type: String, default: () => generateId()() },
+    name: { required: true, type: String },
+    provider: {
+      type: String,
+      required: true,
+      enum: ['ebay', 'etsy', 'tiktokShop'],
+    },
+    active: { required: true, type: Boolean, default: true },
+    // Provider-specific API configuration (flexible for eBay, Etsy, TikTok Shop)
+    config: { type: mongoose.Schema.Types.Mixed, default: {} },
+  },
+  { timestamps: true }
+);
+
+marketplaceSchema.virtual('id').get(function () {
+  return this._id;
+});
+
+marketplaceSchema.set('toJSON', { virtuals: true });
+
+export const marketplaceModel = mongoose.model('marketplace', marketplaceSchema);
diff --git a/src/database/schemas/sales/salesorder.schema.js b/src/database/schemas/sales/salesorder.schema.js
index 20f18c8..6a2ade7 100644
--- a/src/database/schemas/sales/salesorder.schema.js
+++ b/src/database/schemas/sales/salesorder.schema.js
@@ -18,6 +18,7 @@ const salesOrderSchema = new Schema(
     totalTaxAmount: { type: Number, required: true, default: 0 },
     timestamp: { type: Date, default: Date.now },
     client: { type: Schema.Types.ObjectId, ref: 'client', required: true },
+    marketplace: { type: Schema.Types.ObjectId, ref: 'marketplace', required: false },
     state: {
       type: { type: String, required: true, default: 'draft' },
     },
diff --git a/src/index.js b/src/index.js
index 2b5b537..f6f0c96 100644
--- a/src/index.js
+++ b/src/index.js
@@ -46,6 +46,7 @@ import {
   paymentRoutes,
   clientRoutes,
   salesOrderRoutes,
+  marketplaceRoutes,
   userNotifierRoutes,
   notificationRoutes,
   odataRoutes,
@@ -163,6 +164,7 @@ app.use('/invoices', invoiceRoutes);
 app.use('/payments', paymentRoutes);
 app.use('/clients', clientRoutes);
 app.use('/salesorders', salesOrderRoutes);
+app.use('/marketplaces', marketplaceRoutes);
 app.use('/notes', noteRoutes);
 app.use('/usernotifiers', userNotifierRoutes);
 app.use('/notifications', notificationRoutes);
diff --git a/src/routes/index.js b/src/routes/index.js
index 1839922..c193483 100644
--- a/src/routes/index.js
+++ b/src/routes/index.js
@@ -38,6 +38,7 @@ import invoiceRoutes from './finance/invoices.js';
 import paymentRoutes from './finance/payments.js';
 import clientRoutes from './sales/clients.js';
 import salesOrderRoutes from './sales/salesorders.js';
+import marketplaceRoutes from './sales/marketplaces.js';
 import noteRoutes from './misc/notes.js';
 import userNotifierRoutes from './misc/usernotifiers.js';
 import notificationRoutes from './misc/notifications.js';
@@ -87,6 +88,7 @@ export {
   paymentRoutes,
   clientRoutes,
   salesOrderRoutes,
+  marketplaceRoutes,
   userNotifierRoutes,
   notificationRoutes,
   odataRoutes,
diff --git a/src/routes/sales/marketplaces.js b/src/routes/sales/marketplaces.js
new file mode 100644
index 0000000..0faec3d
--- /dev/null
+++ b/src/routes/sales/marketplaces.js
@@ -0,0 +1,58 @@
+import express from 'express';
+import { isAuthenticated } from '../../keycloak.js';
+import { getFilter, convertPropertiesString } from '../../utils.js';
+
+const router = express.Router();
+import {
+  listMarketplacesRouteHandler,
+  getMarketplaceRouteHandler,
+  editMarketplaceRouteHandler,
+  newMarketplaceRouteHandler,
+  deleteMarketplaceRouteHandler,
+  listMarketplacesByPropertiesRouteHandler,
+  getMarketplaceStatsRouteHandler,
+  getMarketplaceHistoryRouteHandler,
+} from '../../services/sales/marketplaces.js';
+
+// list of marketplaces
+router.get('/', isAuthenticated, (req, res) => {
+  const { page, limit, property, search, sort, order } = req.query;
+  const allowedFilters = ['name', 'provider', 'active', 'createdAt', 'updatedAt'];
+  const filter = getFilter(req.query, allowedFilters);
+  listMarketplacesRouteHandler(req, res, page, limit, property, filter, search, sort, order);
+});
+
+router.get('/properties', isAuthenticated, (req, res) => {
+  let properties = convertPropertiesString(req.query.properties);
+  const allowedFilters = ['name', 'provider', 'active', 'createdAt', 'updatedAt'];
+  const filter = getFilter(req.query, allowedFilters, false);
+  listMarketplacesByPropertiesRouteHandler(req, res, properties, filter);
+});
+
+router.post('/', isAuthenticated, (req, res) => {
+  newMarketplaceRouteHandler(req, res);
+});
+
+// get marketplace stats
+router.get('/stats', isAuthenticated, (req, res) => {
+  getMarketplaceStatsRouteHandler(req, res);
+});
+
+// get marketplaces history
+router.get('/history', isAuthenticated, (req, res) => {
+  getMarketplaceHistoryRouteHandler(req, res);
+});
+
+router.get('/:id', isAuthenticated, (req, res) => {
+  getMarketplaceRouteHandler(req, res);
+});
+
+router.put('/:id', isAuthenticated, async (req, res) => {
+  editMarketplaceRouteHandler(req, res);
+});
+
+router.delete('/:id', isAuthenticated, async (req, res) => {
+  deleteMarketplaceRouteHandler(req, res);
+});
+
+export default router;
diff --git a/src/services/sales/clients.js b/src/services/sales/clients.js
index 075f920..92fb626 100644
--- a/src/services/sales/clients.js
+++ b/src/services/sales/clients.js
@@ -98,6 +98,7 @@ export const editClientRouteHandler = async (req, res) => {
     address: req.body.address,
     active: req.body.active,
     tags: req.body.tags,
+    marketplace: req.body.marketplace,
   };
   // Create audit log before updating
   const result = await editObject({
@@ -128,6 +129,7 @@ export const newClientRouteHandler = async (req, res) => {
     address: req.body.address,
     active: req.body.active,
     tags: req.body.tags,
+    marketplace: req.body.marketplace,
   };
   const result = await newObject({
     model: clientModel,
diff --git a/src/services/sales/marketplaces.js b/src/services/sales/marketplaces.js
new file mode 100644
index 0000000..56bb6a2
--- /dev/null
+++ b/src/services/sales/marketplaces.js
@@ -0,0 +1,176 @@
+import config from '../../config.js';
+import { marketplaceModel } from '../../database/schemas/sales/marketplace.schema.js';
+import log4js from 'log4js';
+import mongoose from 'mongoose';
+import {
+  deleteObject,
+  listObjects,
+  getObject,
+  editObject,
+  newObject,
+  listObjectsByProperties,
+  getModelStats,
+  getModelHistory,
+} from '../../database/database.js';
+const logger = log4js.getLogger('Marketplaces');
+logger.level = config.server.logLevel;
+
+export const listMarketplacesRouteHandler = async (
+  req,
+  res,
+  page = 1,
+  limit = 25,
+  property = '',
+  filter = {},
+  search = '',
+  sort = '',
+  order = 'ascend'
+) => {
+  const result = await listObjects({
+    model: marketplaceModel,
+    page,
+    limit,
+    property,
+    filter,
+    search,
+    sort,
+    order,
+  });
+
+  if (result?.error) {
+    logger.error('Error listing marketplaces.');
+    res.status(result.code).send(result);
+    return;
+  }
+
+  logger.debug(`List of marketplaces (Page ${page}, Limit ${limit}). Count: ${result.length}.`);
+  res.send(result);
+};
+
+export const listMarketplacesByPropertiesRouteHandler = async (
+  req,
+  res,
+  properties = '',
+  filter = {}
+) => {
+  const result = await listObjectsByProperties({
+    model: marketplaceModel,
+    properties,
+    filter,
+  });
+
+  if (result?.error) {
+    logger.error('Error listing marketplaces.');
+    res.status(result.code).send(result);
+    return;
+  }
+
+  logger.debug(`List of marketplaces. Count: ${result.length}`);
+  res.send(result);
+};
+
+export const getMarketplaceRouteHandler = async (req, res) => {
+  const id = req.params.id;
+  const result = await getObject({
+    model: marketplaceModel,
+    id,
+  });
+  if (result?.error) {
+    logger.warn(`Marketplace not found with supplied id.`);
+    return res.status(result.code).send(result);
+  }
+  logger.debug(`Retrieved marketplace with ID: ${id}`);
+  res.send(result);
+};
+
+export const editMarketplaceRouteHandler = async (req, res) => {
+  const id = new mongoose.Types.ObjectId(req.params.id);
+
+  logger.trace(`Marketplace with ID: ${id}`);
+
+  const updateData = {
+    updatedAt: new Date(),
+    name: req.body.name,
+    provider: req.body.provider,
+    active: req.body.active,
+    config: req.body.config || {},
+  };
+  const result = await editObject({
+    model: marketplaceModel,
+    id,
+    updateData,
+    user: req.user,
+  });
+
+  if (result.error) {
+    logger.error('Error editing marketplace:', result.error);
+    res.status(result.code).send(result);
+    return;
+  }
+
+  logger.debug(`Edited marketplace with ID: ${id}`);
+  res.send(result);
+};
+
+export const newMarketplaceRouteHandler = async (req, res) => {
+  const newData = {
+    updatedAt: new Date(),
+    name: req.body.name,
+    provider: req.body.provider,
+    active: req.body.active !== false,
+    config: req.body.config || {},
+  };
+  const result = await newObject({
+    model: marketplaceModel,
+    newData,
+    user: req.user,
+  });
+  if (result.error) {
+    logger.error('No marketplace created:', result.error);
+    return res.status(result.code).send(result);
+  }
+
+  logger.debug(`New marketplace with ID: ${result._id}`);
+  res.send(result);
+};
+
+export const deleteMarketplaceRouteHandler = async (req, res) => {
+  const id = new mongoose.Types.ObjectId(req.params.id);
+
+  logger.trace(`Marketplace with ID: ${id}`);
+
+  const result = await deleteObject({
+    model: marketplaceModel,
+    id,
+    user: req.user,
+  });
+  if (result.error) {
+    logger.error('No marketplace deleted:', result.error);
+    return res.status(result.code).send(result);
+  }
+
+  logger.debug(`Deleted marketplace with ID: ${result._id}`);
+  res.send(result);
+};
+
+export const getMarketplaceStatsRouteHandler = async (req, res) => {
+  const result = await getModelStats({ model: marketplaceModel });
+  if (result?.error) {
+    logger.error('Error fetching marketplace stats:', result.error);
+    return res.status(result.code).send(result);
+  }
+  logger.trace('Marketplace stats:', result);
+  res.send(result);
+};
+
+export const getMarketplaceHistoryRouteHandler = async (req, res) => {
+  const from = req.query.from;
+  const to = req.query.to;
+  const result = await getModelHistory({ model: marketplaceModel, from, to });
+  if (result?.error) {
+    logger.error('Error fetching marketplace history:', result.error);
+    return res.status(result.code).send(result);
+  }
+  logger.trace('Marketplace history:', result);
+  res.send(result);
+};
diff --git a/src/services/sales/salesorders.js b/src/services/sales/salesorders.js
index dcc0a98..b17c37a 100644
--- a/src/services/sales/salesorders.js
+++ b/src/services/sales/salesorders.js
@@ -40,7 +40,7 @@ export const listSalesOrdersRouteHandler = async (
     search,
     sort,
     order,
-    populate: ['client'],
+    populate: ['client', 'marketplace'],
   });
 
   if (result?.error) {
@@ -64,7 +64,7 @@ export const listSalesOrdersByPropertiesRouteHandler = async (
     model: salesOrderModel,
     properties,
     filter,
-    populate: ['client'],
+    populate: ['client', 'marketplace'],
     masterFilter,
   });
 
@@ -83,7 +83,7 @@ export const getSalesOrderRouteHandler = async (req, res) => {
   const result = await getObject({
     model: salesOrderModel,
     id,
-    populate: ['client'],
+    populate: ['client', 'marketplace'],
   });
   if (result?.error) {
     logger.warn(`Sales Order not found with supplied id.`);
@@ -116,6 +116,7 @@ export const editSalesOrderRouteHandler = async (req, res) => {
   const updateData = {
     updatedAt: new Date(),
     client: req.body.client,
+    marketplace: req.body.marketplace,
   };
   // Create audit log before updating
   const result = await editObject({
@@ -140,6 +141,7 @@ export const editMultipleSalesOrdersRouteHandler = async (req, res) => {
   const updates = req.body.map((update) => ({
     _id: update._id,
     client: update.client,
+    marketplace: update.marketplace,
   }));
 
   if (!Array.isArray(updates)) {
@@ -167,6 +169,7 @@ export const newSalesOrderRouteHandler = async (req, res) => {
   const newData = {
     updatedAt: new Date(),
     client: req.body.client,
+    marketplace: req.body.marketplace,
     totalAmount: 0,
     totalAmountWithTax: 0,
     totalTaxAmount: 0,