> ## Documentation Index > Fetch the complete documentation index at: https://www.cometchat.com/docs/llms.txt > Use this file to discover all available pages before exploring further. > Creates a group. # Create ## Constraints | Item | Constraint | Notes | | -------------------------------------------- | --------------------------------- | ---------------------------------------------------------------------------------------------------- | | GUID character limit | 100 characters | Alphanumeric with dashes only; spaces not allowed | | Group name | 100 characters (UTF8mb4) | Supports all languages and emojis | | Maximum users in a group (with all features) | 300 | Groups up to 300 members support all features including delivery/read receipts and typing indicators | | Maximum users in a group (without receipts) | 100,000 (up to 10,000 concurrent) | Large groups disable delivery/read receipts and typing indicators for performance | | Group password | 100 characters max | Only applicable for password-protected groups | | Group description | 255 characters (UTF8mb4) | Brief summary of the group's purpose | | Maximum groups | No limit | Create as many groups as needed; billing based on active users | | Typing indicators for groups | Up to 1000 online users | Disabled for larger groups to optimize performance | | Unread message counts for groups | Up to 300 members | Not updated for groups with more than 300 members | | Delivery and read receipts for groups | Up to 300 online users | Disabled in large groups to reduce server load | | Active presence subscriptions | Up to 1000 online users | Presence notifications not sent beyond this limit | For the complete error reference, see [Error Guide](/articles/error-guide). ## OpenAPI ````yaml post /groups openapi: 3.0.0 info: title: Chat APIs description: Manage messages, users, groups for a particular app using our Chat API. version: '3.0' servers: - url: https://{appId}.api-{region}.cometchat.io/v3 variables: appId: default: appId description: (Required) App ID region: enum: - us - eu - in default: us description: Select Region security: [] tags: - name: API Keys description: The API keys are used to authorise the APIs - name: Roles description: The roles are used to give user access rights - name: Users description: The REST collection for users. - name: Auth Tokens description: The auth tokens are used to login end users using client SDKs. - name: Blocked Users description: The REST collections for blocked users. - name: Friends description: List,add and remove friends by passing UID in path variables - name: Groups description: The REST collections for groups. - name: Banned Users description: Ban and Unban user by passing other UID in path variables. - name: Group Members description: The REST collections for group members. - name: Messages description: The REST collections for messages. - name: Conversations description: The REST collections for conversations. - name: Restrict Features description: Allows Restricting Features - name: Metrics description: Allows accessing Data Metrics - name: Triggers description: Allows adding triggers to a webhook. - name: Webhooks description: Allows accessing Webhooks. - name: Notifications description: Allows configuring Notifications core. paths: /groups: post: tags: - Groups summary: Create description: Creates a group. operationId: create-group parameters: - $ref: '#/components/parameters/onBehalfOf' requestBody: content: application/json: schema: required: - guid - name - type properties: guid: description: A unique identifier for a group. type: string name: description: Name of the group. type: string type: description: Type of the group. Can be public, password or private. type: string enum: - public - password - private password: description: A password required to join the the group with type password type: string icon: description: An URL for a group icon. type: string description: description: Description about the group type: string metadata: description: Additional data for the group. type: object owner: description: The UID that you wish to make owner of the group type: string tags: description: List of tags to identify specific groups. type: array items: type: string default: - tag1 members: description: >- Add members to a group with scope admins,moderators and participants. properties: admins: description: UIDs of users to be made admins. type: array items: type: string default: [] moderators: description: UIDs of users to be made moderators. type: array items: type: string default: [] participants: description: UIDs of users to be made participants. type: array items: type: string default: [] usersToBan: description: UIDs of the users to be banned from the group. type: array items: type: string default: [] type: object type: object responses: '200': description: Create Group content: application/json: schema: properties: data: type: object type: object example: data: guid: project-group name: Project Group description: project related discussions between members icon: >- https://assets.cometchat.io/sampleapp/v2/groups/cometchat-guid-1.webp type: public scope: admin membersCount: 1 joinedAt: 1638440784 conversationId: group_project-group hasJoined: true createdAt: 1638440784 owner: cometchat-uid-4 tags: - friends - project security: - apiKey: [] components: parameters: onBehalfOf: name: onBehalfOf in: header description: UID of the user on whose behalf the action is performed. schema: type: string securitySchemes: apiKey: type: apiKey description: API Key with fullAccess scope(i.e. Rest API Key from the Dashboard). name: apikey in: header ````