diff --git a/packages/api-client/src/client.ts b/packages/api-client/src/client.ts
index d4b223ad34..a39c0bc8df 100644
--- a/packages/api-client/src/client.ts
+++ b/packages/api-client/src/client.ts
@@ -34,15 +34,22 @@ import {
   AttachedData,
   Mixin,
   MixinUpdate,
-  MixinData
+  MixinData,
+  generateId
 } from '@hcengineering/core'
 import client, { clientId } from '@hcengineering/client'
 import { addLocation, getResource } from '@hcengineering/platform'
 
 import { login, selectWorkspace } from './account'
 import { type ServerConfig, loadServerConfig } from './config'
-import { type MarkupOperations, type MarkupFormat, type MarkupRef, createMarkupOperations } from './markup'
-import { type PlatformClient, type ConnectOptions } from './types'
+import {
+  type MarkupFormat,
+  type MarkupOperations,
+  type MarkupRef,
+  MarkupContent,
+  createMarkupOperations
+} from './markup'
+import { type PlatformClient, type ConnectOptions, WithMarkup } from './types'
 
 /**
  * Create platform client
@@ -121,41 +128,62 @@ class PlatformClientImpl implements PlatformClient {
     await this.connection.close()
   }
 
-  // TxOperations
+  private async processMarkup<T>(id: Ref<Doc>, data: WithMarkup<T>): Promise<T> {
+    const result: any = {}
+
+    for (const [key, value] of Object.entries(data)) {
+      if (value instanceof MarkupContent) {
+        result[key] = this.markup.uploadMarkup(id, key, value.content, value.kind)
+      } else {
+        result[key] = value
+      }
+    }
+
+    return result as T
+  }
+
+  // DocOperations
 
   async createDoc<T extends Doc>(
     _class: Ref<Class<T>>,
     space: Ref<Space>,
-    attributes: Data<T>,
+    attributes: WithMarkup<Data<T>>,
     id?: Ref<T>
   ): Promise<Ref<T>> {
-    return await this.client.createDoc(_class, space, attributes, id)
+    id ??= generateId()
+    const data = await this.processMarkup<Data<T>>(id, attributes)
+    return await this.client.createDoc(_class, space, data, id)
   }
 
   async updateDoc<T extends Doc>(
     _class: Ref<Class<T>>,
     space: Ref<Space>,
     objectId: Ref<T>,
-    operations: DocumentUpdate<T>,
+    operations: WithMarkup<DocumentUpdate<T>>,
     retrieve?: boolean
   ): Promise<TxResult> {
-    return await this.client.updateDoc(_class, space, objectId, operations, retrieve)
+    const update = await this.processMarkup<DocumentUpdate<T>>(objectId, operations)
+    return await this.client.updateDoc(_class, space, objectId, update, retrieve)
   }
 
   async removeDoc<T extends Doc>(_class: Ref<Class<T>>, space: Ref<Space>, objectId: Ref<T>): Promise<TxResult> {
     return await this.client.removeDoc(_class, space, objectId)
   }
 
+  // CollectionOperations
+
   async addCollection<T extends Doc, P extends AttachedDoc>(
     _class: Ref<Class<P>>,
     space: Ref<Space>,
     attachedTo: Ref<T>,
     attachedToClass: Ref<Class<T>>,
     collection: Extract<keyof T, string> | string,
-    attributes: AttachedData<P>,
+    attributes: WithMarkup<AttachedData<P>>,
     id?: Ref<P>
   ): Promise<Ref<P>> {
-    return await this.client.addCollection(_class, space, attachedTo, attachedToClass, collection, attributes, id)
+    id ??= generateId()
+    const data = await this.processMarkup<AttachedData<P>>(id, attributes)
+    return await this.client.addCollection(_class, space, attachedTo, attachedToClass, collection, data, id)
   }
 
   async updateCollection<T extends Doc, P extends AttachedDoc>(
@@ -165,9 +193,10 @@ class PlatformClientImpl implements PlatformClient {
     attachedTo: Ref<T>,
     attachedToClass: Ref<Class<T>>,
     collection: Extract<keyof T, string> | string,
-    operations: DocumentUpdate<P>,
+    operations: WithMarkup<DocumentUpdate<P>>,
     retrieve?: boolean
   ): Promise<Ref<T>> {
+    const update = await this.processMarkup<DocumentUpdate<P>>(objectId, operations)
     return await this.client.updateCollection(
       _class,
       space,
@@ -175,7 +204,7 @@ class PlatformClientImpl implements PlatformClient {
       attachedTo,
       attachedToClass,
       collection,
-      operations,
+      update,
       retrieve
     )
   }
@@ -191,14 +220,17 @@ class PlatformClientImpl implements PlatformClient {
     return await this.client.removeCollection(_class, space, objectId, attachedTo, attachedToClass, collection)
   }
 
+  // MixinOperations
+
   async createMixin<D extends Doc, M extends D>(
     objectId: Ref<D>,
     objectClass: Ref<Class<D>>,
     objectSpace: Ref<Space>,
     mixin: Ref<Mixin<M>>,
-    attributes: MixinData<D, M>
+    attributes: WithMarkup<MixinData<D, M>>
   ): Promise<TxResult> {
-    return await this.client.createMixin(objectId, objectClass, objectSpace, mixin, attributes)
+    const data = await this.processMarkup<MixinData<D, M>>(objectId, attributes)
+    return await this.client.createMixin(objectId, objectClass, objectSpace, mixin, data)
   }
 
   async updateMixin<D extends Doc, M extends D>(
@@ -206,9 +238,10 @@ class PlatformClientImpl implements PlatformClient {
     objectClass: Ref<Class<D>>,
     objectSpace: Ref<Space>,
     mixin: Ref<Mixin<M>>,
-    attributes: MixinUpdate<D, M>
+    attributes: WithMarkup<MixinUpdate<D, M>>
   ): Promise<TxResult> {
-    return await this.client.updateMixin(objectId, objectClass, objectSpace, mixin, attributes)
+    const update = await this.processMarkup<MixinUpdate<D, M>>(objectId, attributes)
+    return await this.client.updateMixin(objectId, objectClass, objectSpace, mixin, update)
   }
 
   // Markup
diff --git a/packages/api-client/src/markup/types.ts b/packages/api-client/src/markup/types.ts
index cd1d16daf0..a641f9fd06 100644
--- a/packages/api-client/src/markup/types.ts
+++ b/packages/api-client/src/markup/types.ts
@@ -21,6 +21,24 @@ export type MarkupRef = CollaborativeDoc
 /** @public */
 export type MarkupFormat = 'markup' | 'html' | 'markdown'
 
+/** @public */
+export class MarkupContent {
+  constructor (
+    readonly content: string,
+    readonly kind: MarkupFormat
+  ) {}
+}
+
+/** @public */
+export function html (content: string): MarkupContent {
+  return new MarkupContent(content, 'html')
+}
+
+/** @public */
+export function markdown (content: string): MarkupContent {
+  return new MarkupContent(content, 'markdown')
+}
+
 /**
  * Provides operations for managing markup (rich-text) content.
  * @public */
diff --git a/packages/api-client/src/types.ts b/packages/api-client/src/types.ts
index 820ae9c48f..4a7cd0a66a 100644
--- a/packages/api-client/src/types.ts
+++ b/packages/api-client/src/types.ts
@@ -15,6 +15,7 @@
 
 import { type ClientSocketFactory } from '@hcengineering/client'
 import {
+  CollaborativeDoc,
   type AttachedData,
   type AttachedDoc,
   type Class,
@@ -34,7 +35,18 @@ import {
   type TxResult,
   type WithLookup
 } from '@hcengineering/core'
-import { type MarkupOperations } from './markup'
+import { type MarkupContent, type MarkupOperations } from './markup'
+
+type WithPropertyType<T, X, Y> = {
+  [P in keyof T]: T[P] extends X ? Y : T[P]
+}
+
+/** @public */
+export type WithMarkup<T> = WithPropertyType<
+WithPropertyType<T, CollaborativeDoc | undefined, MarkupContent | undefined>,
+CollaborativeDoc,
+MarkupContent
+>
 
 /**
  * Platform API client
@@ -77,7 +89,7 @@ export interface DocOperations {
   createDoc: <T extends Doc>(
     _class: Ref<Class<T>>,
     space: Ref<Space>,
-    attributes: Data<T>,
+    attributes: WithMarkup<Data<T>>,
     id?: Ref<T>
   ) => Promise<Ref<T>>
 
@@ -85,7 +97,7 @@ export interface DocOperations {
     _class: Ref<Class<T>>,
     space: Ref<Space>,
     objectId: Ref<T>,
-    operations: DocumentUpdate<T>,
+    operations: WithMarkup<DocumentUpdate<T>>,
     retrieve?: boolean
   ) => Promise<TxResult>
 
@@ -102,7 +114,7 @@ export interface CollectionOperations {
     attachedTo: Ref<T>,
     attachedToClass: Ref<Class<T>>,
     collection: Extract<keyof T, string> | string,
-    attributes: AttachedData<P>,
+    attributes: WithMarkup<AttachedData<P>>,
     id?: Ref<P>
   ) => Promise<Ref<P>>
 
@@ -113,7 +125,7 @@ export interface CollectionOperations {
     attachedTo: Ref<T>,
     attachedToClass: Ref<Class<T>>,
     collection: Extract<keyof T, string> | string,
-    operations: DocumentUpdate<P>,
+    operations: WithMarkup<DocumentUpdate<P>>,
     retrieve?: boolean
   ) => Promise<Ref<T>>
 
@@ -136,7 +148,7 @@ export interface MixinOperations {
     objectClass: Ref<Class<D>>,
     objectSpace: Ref<Space>,
     mixin: Ref<Mixin<M>>,
-    attributes: MixinData<D, M>
+    attributes: WithMarkup<MixinData<D, M>>
   ) => Promise<TxResult>
 
   updateMixin: <D extends Doc, M extends D>(
@@ -144,7 +156,7 @@ export interface MixinOperations {
     objectClass: Ref<Class<D>>,
     objectSpace: Ref<Space>,
     mixin: Ref<Mixin<M>>,
-    attributes: MixinUpdate<D, M>
+    attributes: WithMarkup<MixinUpdate<D, M>>
   ) => Promise<TxResult>
 }