diff --git a/src/plugins/api/posts.ts b/src/plugins/api/posts.ts
index 7f2d3ed..ffcb4c9 100644
--- a/src/plugins/api/posts.ts
+++ b/src/plugins/api/posts.ts
@@ -37,7 +37,6 @@ import {
     GroupItemType,
     Installation,
     App,
-    Group,
 } from '../../types/collections'
 
 import { PluginOptions } from '../../types'
@@ -45,22 +44,25 @@ import { PluginOptions } from '../../types'
 interface PostBody {
     text?: string
     cover?: string
+    installation: string
     visible: boolean
     status?: Status
     attachments: PostAttachment[]
+    data: object
     parent: string
 }
 
 const postBodySchema = {
     type: 'object',
-    required: ['visible'],
+    required: ['installation', 'visible'],
     properties: {
+        installation: { type: 'string' },
+        visible: { type: 'boolean' },
         text: { type: 'string' },
         cover: {
             type: 'string',
             maxLength: SHORT_TEXT_LENGTH,
         },
-        visible: { type: 'boolean' },
         status: {
             type: 'object',
             required: ['date'],
@@ -77,10 +79,10 @@ const postBodySchema = {
             type: 'array',
             items: {
                 type: 'object',
-                required: ['imageUrl'],
+                required: ['url'],
                 properties: {
-                    imageUrl: { type: 'string' },
-                    caption: {
+                    url: { type: 'string' },
+                    text: {
                         type: 'string',
                         maxLength: SHORT_TEXT_LENGTH,
                     },
@@ -91,11 +93,14 @@ const postBodySchema = {
                 },
             },
         },
+        data: {
+            type: 'object',
+        },
         parent: { type: 'string' },
     },
 }
 
-async function createPost(client: CosmosClient, userId: string, body: PostBody, reply: FastifyReply<ServerResponse>, logger: Logger) {
+async function createPost(client: CosmosClient, userId: string, appId: string, body: PostBody, reply: FastifyReply<ServerResponse>, logger: Logger) {
     let newPostRelationship: PostRelationship | undefined
 
     const postContainer = containerFor(client, 'Posts')
@@ -111,7 +116,8 @@ async function createPost(client: CosmosClient, userId: string, body: PostBody,
     const postId = createPostId()
 
     if (body.parent) {
-        const parent = await getItem<Post>({ container: postContainer, id: body.parent })
+        const parentItem = postContainer.item(body.parent, body.parent)
+        const { resource: parent } = await parentItem.read<Post>()
         if (!parent) return badRequestFormError(reply, 'parent', 'Invalid parent')
 
         const parentRelationship = await getItem<PostRelationship>({
@@ -130,6 +136,13 @@ async function createPost(client: CosmosClient, userId: string, body: PostBody,
                 parent.id,
             ]
         }
+
+        if (body.visible) {
+            await parentItem.replace<Post>({
+                ...parent,
+                replies: parent.replies + 1,
+            })
+        }
     }
 
     const post: Post = {
@@ -137,13 +150,16 @@ async function createPost(client: CosmosClient, userId: string, body: PostBody,
         pk: postId,
         t: PostItemType.Post,
         userId,
+        appId,
         root: newPostRelationship ? newPostRelationship.pk : postId,
         parents: newPostRelationship ? newPostRelationship.parents : [],
         text: trimContent(body.text, 1000),
         cover: trimContent(body.cover),
         visible: body.visible,
-        attachments: [],
+        attachments: body.attachments,
+        data: body.data,
         awards: 0,
+        replies: 0,
         latestAwards: [],
         created: Date.now(),
     }
@@ -169,8 +185,6 @@ async function createPost(client: CosmosClient, userId: string, body: PostBody,
         logger,
     })
 
-    logger.debug('subscribers', subscribers)
-
     for (const uid of [userId, ...subscribers.map(s => s.userId)]) {
         await userContainer.items.create<UserTimelinePost>({
             id: postId,
@@ -205,13 +219,32 @@ function createPostRoute(server: FastifyInstance<Server, IncomingMessage, Server
         if (!server.database) return serverError(reply)
         if (!request.viewer) return unauthorizedError(reply)
 
-        return await createPost(server.database.client, request.viewer.id, request.body, reply, request.log)
+        const installationId = request.body.installation
+
+        const container = containerFor(server.database.client, 'Apps')
+        const installation = await getItem<Installation>({
+            container,
+            id: installationId,
+            partitionKey: INSTALLATION_PARTITION_KEY,
+        })
+
+        if (!installation) return badRequestError(reply, 'Installation not found')
+        if (installation.userId !== request.viewer.id) return badRequestError(reply)
+
+        const app = await getItem<App>({
+            container,
+            id: installation.appId,
+            partitionKey: APP_PARTITION_KEY,
+        })
+
+        if (!app) return serverError(reply)
+
+        return await createPost(server.database.client, request.viewer.id, app.id, request.body, reply, request.log)
     })
 }
 
 function createAppPostRoute(server: FastifyInstance<Server, IncomingMessage, ServerResponse>) {
     interface Headers {
-        installation: string
         timestamp: string
         signature: string
     }
@@ -221,7 +254,6 @@ function createAppPostRoute(server: FastifyInstance<Server, IncomingMessage, Ser
             headers: {
                 type: 'object',
                 properties: {
-                    installation: { type: 'string' },
                     timestamp: { type: 'string' },
                     signature: { type: 'string' },
                 },
@@ -242,12 +274,13 @@ function createAppPostRoute(server: FastifyInstance<Server, IncomingMessage, Ser
     server.post<DefaultQuery, DefaultParams, Headers, PostBody>('/api/app/post', options, async (request, reply) => {
         if (!server.database) return serverError(reply)
 
-        const { installation: installationId, timestamp, signature } = request.headers
+        const { timestamp, signature } = request.headers
 
-        if (!installationId) return badRequestError(reply, '"installation" header required')
         if (!timestamp) return badRequestError(reply, '"timestamp" header required')
         if (!signature) return badRequestError(reply, '"signature" header required')
 
+        const installationId = request.body.installation
+
         const container = containerFor(server.database.client, 'Apps')
         const installation = await getItem<Installation>({
             container,
@@ -269,7 +302,7 @@ function createAppPostRoute(server: FastifyInstance<Server, IncomingMessage, Ser
             return badRequestError(reply, 'Invalid signature')
         }
 
-        return await createPost(server.database.client, installation.userId, request.body, reply, request.log)
+        return await createPost(server.database.client, installation.userId, app.id, request.body, reply, request.log)
     })
 }
 
@@ -389,6 +422,7 @@ function timelineRoute(server: FastifyInstance<Server, IncomingMessage, ServerRe
                             type: 'array',
                             items: postSchema,
                         },
+                        continuation: { type: 'string' },
                     },
                 },
                 400: errorSchema,
@@ -455,11 +489,11 @@ function postRoute(server: FastifyInstance<Server, IncomingMessage, ServerRespon
                     type: 'object',
                     properties: {
                         post: postSchema,
-                        descendants: {
+                        parents: {
                             type: 'array',
                             items: postSchema,
                         },
-                        ancestors: {
+                        children: {
                             type: 'array',
                             items: postSchema,
                         },
@@ -527,7 +561,7 @@ function postRoute(server: FastifyInstance<Server, IncomingMessage, ServerRespon
                 SELECT g.userId FROM Groups g WHERE
                     g.pk = @viewerGroup AND
                     g.t = @type AND
-                    (g.blockedId = @viewer OR g.blockedId = @viewerGroup)
+                    (g.blockedId = @viewer OR g.blockedId = @viewerGroup) AND
                     ARRAY_CONTAINS(@ids, g.userId)
             `, {
                 viewer: viewer.id,
@@ -539,7 +573,7 @@ function postRoute(server: FastifyInstance<Server, IncomingMessage, ServerRespon
             const blocks = await queryItems<GroupBlock>({
                 container: containerFor(server.database.client, 'Groups'),
                 query: blockQuery,
-                logger: request.log
+                logger: request.log,
             })
             const blockedUserIds = blocks.map(b => b.userId)
 
@@ -547,16 +581,16 @@ function postRoute(server: FastifyInstance<Server, IncomingMessage, ServerRespon
 
             return {
                 post,
-                descendants: descendants.filter(p => !blockedUserIds.includes(p.userId)),
-                ancestors: ancestors.filter(p => !blockedUserIds.includes(p.userId)),
+                children: descendants.filter(p => !blockedUserIds.includes(p.userId)),
+                parents: ancestors.filter(p => !blockedUserIds.includes(p.userId)),
                 users: users.filter(u => !blockedUserIds.includes(u.id)),
             }
         }
 
         return {
             post,
-            descendants,
-            ancestors,
+            children: descendants,
+            parents: ancestors,
             users,
         }
     })
diff --git a/src/schemas.ts b/src/schemas.ts
index 60bb01c..4aa605a 100644
--- a/src/schemas.ts
+++ b/src/schemas.ts
@@ -78,10 +78,28 @@ export const postSchema: JSONSchema = {
     type: 'object',
     properties: {
         id: { type: 'string' },
+        userId: { type: 'string' },
+        appId: { type: 'string' },
         user: userSchema,
         text: { type: 'string' },
         cover: { type: 'string' },
+        attachments: {
+            type: 'array',
+            items: {
+                type: 'object',
+                properties: {
+                    url: { type: 'string' },
+                    text: { type: 'string' },
+                    cover: { type: 'string' },
+                },
+            },
+        },
+        data: {
+            type: 'object',
+            additionalProperties: true,
+        },
         visible: { type: 'boolean' },
+        replies: { type: 'number' },
         created: { type: 'number' },
     },
 }
diff --git a/src/types/collections.ts b/src/types/collections.ts
index 6e5f834..c525f1d 100644
--- a/src/types/collections.ts
+++ b/src/types/collections.ts
@@ -260,8 +260,8 @@ export interface UserTimelinePost {
 }
 
 export interface PostAttachment {
-    imageUrl: string
-    caption?: string
+    url: string
+    text?: string
     cover?: string
 }
 
@@ -288,6 +288,7 @@ export interface Post {
     status?: Status
     data?: PostData
     visible: boolean
+    replies: number
     awards: number
     latestAwards: PostAwardPartial[]
     created: number