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Last active September 16, 2025 15:14
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rocket.chat web-hook to post messages silently
Raw
readme.md

This is a Rocket.Chat incoming web hook. Hook gets an array of "messages" and silently creates chat messages directly in the Rocket's database without disturbing users with notifications or alerts - messages just appear in the channels. Messages appear silently even if the user has the channel openned: no refresh or re-enter is required (this is not this script's feature, it's how Rocket works).

This script can post messages to channels and groups by name (if message destination set to #name), or by api roomId (no prefixes in destination). And it can post DM to a user (if destination is set to @username). Please note, in this case DM between message author and destination user must already be created.

Note. Rocket.Chat's server version 6 has undergone significant changes. As a result, now there are two script versions: silent-post-whs-v5.js for server version 5 and silent-post-whs-v6.js for version 6. However, these scripts use an undocumented server API, which unfortunately could result in compatibility issues with even minor future Rocket.Chat updates.

This hook expects request.content: ISilentMessage[];

ISilentMessage {
  // Message body.
  text: string;

  // User to set as message author.
  // No leading @, user must be registered.
  author: string;

  // Channel to post message to.
  // It may be "#channeg_or_group_name", "@username", or "room_id".
  // NOTE: in case of "@username", the DM between this user and message
  // author must exists, this script doesn't create one
  // (greatly complicates everything).
  destination: string;

  // An array of message attachments. Optional, may be omitted.
  attachments: [];
}

Pyhton

with requests.sessions.Session() as session:
  session.post(
    'https://CHAT.URL/hooks/WEBHOOK/TOKEN',
    json=[
      {
        'text': 'Multiline\nmessage\nto #channel_by_name',
        'author': 'admin',
        'destination': '#channel_by_name',
      },
      {
        'text': 'Message to abc123abc123abc123 (roomId)',
        'author': 'admin',
        'destination': 'abc123abc123abc123',
      },
      {
        'text': 'DM to user `user` (by username)',
        'author': 'admin',
        'destination': '@user',
      },
      {
        'text': 'Message with attachments to #channel_by_name',
        'author': 'admin',
        'destination': '#channel_by_name',
        'attachments': [
          {
            "title": "Rocket.Chat",
            "title_link": "https://rocket.chat",
            "text": "Rocket.Chat, the best open source chat",
            "image_url": "/images/integration-attachment-example.png",
            "color": "#764FA5"
          }
        ]
      },
    ])

curl

curl -X POST -H 'Content-Type: application/json' \
     --data '[ { "text": "Multiline\\nmessage\\nto #channel_by_name", "author": "admin", "destination": "#channel_by_name" }, { "text": "Message to abc123abc123abc123 (roomId)", "author": "admin", "destination": "abc123abc123abc123" }, { "text": "DM to user `user` (by username)", "author": "admin", "destination": "@user" }]' \
     https://chat.url/hooks/WEBHOOK/TOKEN
Raw
silent-post-whs-v5.js
class Script {
knownRoomIds = new Map();
knownUserIds = new Map();
process_incoming_request({request}) {
/*
* This hook expects
* request.content: ISilentMessage[];
* ISilentMessage {
* // Message body.
* text: string;
*
* // User to set as message author.
* // No leading @, user must be registered.
* author: string;
*
* // Channel to post message to.
* // It may be "#channeg_or_group_name", "@username", or "room_id".
* // NOTE: in case of "@username", the DM between this user and message
* // author must exists, this script doesn't create one
* // (greatly complicates everything).
* destination: string;
*
* // An array of message attachments. Optional, may be omitted.
* attachments: [];
* }
* */
for (const message of request.content) {
authorId = this.findUser(message.author)
if (!authorId) {
continue;
}
rid = this.findDestination(message.destination, authorId);
if (!rid) {
continue;
}
this.postMessageSilent(
rid, authorId, message.author,
message.text, message.attachments);
}
return {
content: null,
};
}
findDestination(dest, authorId) {
if (this.knownRoomIds.has(dest)) {
return this.knownRoomIds.get(dest);
}
let rid = null;
if (dest[0] === '#') {
const room = Rooms.findOneByName(dest.slice(1));
if (!room) {
return null;
}
rid = room._id;
} else if (dest[0] === '@') {
userId = this.findUser(dest.slice(1), knownUserIds);
if (!userId) {
return null;
}
rid = [authorId, userId].sort().join('');
const room = Rooms.findOneById(rid);
if (!room) {
return null;
}
rid = room._id;
} else {
rid = dest;
}
this.knownRoomIds.set(dest, rid);
return rid;
}
findUser(username) {
if (this.knownUserIds.has(username)) {
return this.knownUserIds.get(username);
}
const user = Users.findOneByUsername(username);
if (!user) {
return null;
}
this.knownUserIds.set(username, user._id);
return user._id;
}
postMessageSilent(rid, authorId, authorName, text, attachments) {
const record = {
t: 'p',
rid: rid,
ts: new Date(),
msg: text,
u: {
_id: authorId,
username: authorName,
},
groupable: false,
unread: true,
};
if (attachments && attachments.length) {
record.attachments = attachments;
}
Messages.insertOrUpsert(record);
}
}
Raw
silent-post-whs-v6.js
/* jshint esversion: 2020 */
/* global console, globalThis, Rooms, Users, Messages */
class Script {
knownRoomIds = new Map();
knownUserIds = new Map();
process_incoming_request({request}) {
/*
* This hook expects
* request.content: ISilentMessage[];
* ISilentMessage {
* // Message body.
* text: string;
*
* // User to set as message author.
* // No leading @, user must be registered.
* author: string;
*
* // Channel to post message to.
* // It may be "#channeg_or_group_name", "@username", or "room_id".
* // NOTE: in case of "@username", the DM between this user and message
* // author must exists, this script doesn't create one
* // (greatly complicates everything).
* destination: string;
*
* // An array of message attachments. Optional, may be omitted.
* attachments: [];
* }
* */
this.log('SILENT_POST: Processing', request.content);
this.log('SILENT_POST: Globals', Object.keys(globalThis));
const posts = request.content.map((message) => {
this.log('SILENT_POST: Processing a message', message);
return this.findUser(message.author).then((authorId) => {
this.log('SILENT_POST: Author ID', authorId);
if (!authorId) {
return null;
}
return this.findDestination(message.destination, authorId).then((rid) => {
this.log('SILENT_POST: Destination ID', rid);
if (!rid) {
return null;
}
this.log('SILENT_POST: Go with message');
return this.postMessageSilent(
rid, authorId, message.author,
message.text, message.attachments)
.then((messageId) => {
this.log('SILENT_POST: Done with message');
return messageId;
});
});
});
});
return Promise.all(posts)
.then(() => {
this.log('SILENT_POST: All messages done');
return {
content: null,
};
});
}
findDestination(dest, authorId) {
if (this.knownRoomIds.has(dest)) {
return Promise.resolve(this.knownRoomIds.get(dest));
}
if (dest[0] === '#') {
return Rooms.findOne({name: dest.slice(1)}).then((room) => {
if (!room) {
return null;
}
this.knownRoomIds.set(dest, room._id);
return room._id;
});
}
if (dest[0] === '@') {
return this.findUser(dest.slice(1)).then((userId) => {
if (!userId) {
return null;
}
const rid = [authorId, userId].sort().join('');
return Rooms.findOne({_id: rid}).then((room) => {
if (!room) {
return null;
}
this.knownRoomIds.set(dest, room._id);
return room._id;
});
});
}
this.knownRoomIds.set(dest, dest);
return Promise.resolve(dest);
}
findUser(username) {
if (this.knownUserIds.has(username)) {
return Promise.resolve(this.knownUserIds.get(username));
}
return Users
.findOne({username})
.then((user) => {
if (!user) {
return null;
}
this.knownUserIds.set(username, user._id);
return user._id;
});
}
postMessageSilent(rid, authorId, authorName, text, attachments) {
const record = {
rid: rid,
ts: new Date(),
msg: text,
u: {
_id: authorId,
username: authorName,
},
groupable: false,
unread: true,
};
if (attachments && attachments.length) {
record.attachments = attachments;
}
return Messages.insertOne(record);
}
log(...args) {
// Uncomment to debug
// console.log(...args);
}
}
@gelpiu-developers
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gelpiu-developers commented Sep 16, 2025 •
edited
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Hi guys! If you end up here, I have a working solution in my 7.10.0 Rocket.Chat installation. Thanks to the amazing work done by an external developer (DM me for contact details). I'm sorry not to be able to share that work here, because it's been a paid work and I want to honour the guy and recommend contacting him to build Rocket.Chat custom features and fixing issues. Just inform you that there's, in fact, a way to do it, but you have to make your own bundle.

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