Google Chat Plugin for ElizaOS

Google Chat messaging integration for ElizaOS agents, providing full support for Google Workspace team communication.

Features

• Messaging: Send and receive messages in Google Chat spaces
• Direct Messages: Support for 1:1 DM conversations
• Spaces: Manage presence in Google Chat spaces
• Threads: Reply in threaded conversations
• Reactions: Add and remove emoji reactions
• Attachments: Upload and download media files
• Webhook Support: Receive messages via configurable webhook endpoint
• Multi-language: TypeScript, Python, and Rust implementations

Installation

TypeScript/JavaScript

npm install @elizaos-plugins/plugin-google-chat

Python

pip install elizaos-plugin-google-chat

Rust

Add to your Cargo.toml:

[dependencies]
elizaos-plugin-google-chat = "2.0.0-alpha.1"

Prerequisites

1. Google Cloud Project: Create a project in the Google Cloud Console

2. Enable Google Chat API:

   • Go to APIs & Services > Library
   • Search for "Google Chat API" and enable it

3. Create a Chat App:

   • Go to APIs & Services > Chat API > Configuration
   • Configure your Chat app with a webhook URL

4. Service Account:

   • Go to IAM & Admin > Service Accounts
   • Create a service account with Chat API access
   • Download the JSON key file

5. Configure the Chat App:

   • Set the App URL (webhook endpoint)
   • Configure the audience type and value

Configuration

Environment Variables

Variable	Description	Required
GOOGLE_CHAT_SERVICE_ACCOUNT	Service account JSON string	One of these
GOOGLE_CHAT_SERVICE_ACCOUNT_FILE	Path to service account JSON file	required
GOOGLE_APPLICATION_CREDENTIALS	Default credentials path
GOOGLE_CHAT_AUDIENCE_TYPE	Audience type: app-url or project-number	Yes
GOOGLE_CHAT_AUDIENCE	Audience value for token verification	Yes
GOOGLE_CHAT_WEBHOOK_PATH	Webhook path (default: /googlechat)	No
GOOGLE_CHAT_SPACES	Comma-separated list of spaces	No
GOOGLE_CHAT_REQUIRE_MENTION	Require @mention in spaces (default: true)	No
GOOGLE_CHAT_BOT_USER	Bot user resource name	No
GOOGLE_CHAT_ENABLED	Enable/disable plugin (default: true)	No

Audience Configuration

App URL (Recommended):

• Set GOOGLE_CHAT_AUDIENCE_TYPE=app-url
• Set GOOGLE_CHAT_AUDIENCE to your Chat app's App URL from the Cloud Console

Project Number:

• Set GOOGLE_CHAT_AUDIENCE_TYPE=project-number
• Set GOOGLE_CHAT_AUDIENCE to your Google Cloud project number

Usage

TypeScript

import googleChatPlugin from "@elizaos-plugins/plugin-google-chat";

const agent = createAgent({
  plugins: [googleChatPlugin],
  // ... other config
});

Python

from elizaos_plugin_google_chat import get_plugin

plugin = get_plugin()
# Register with ElizaOS runtime

Rust

use elizaos_plugin_google_chat::GoogleChatService;

let settings = GoogleChatSettings {
    audience_type: GoogleChatAudienceType::AppUrl,
    audience: "https://chat.googleapis.com/api/...".to_string(),
    // ... other settings
    ..Default::default()
};

let service = GoogleChatService::new(settings).await?;
service.start().await?;

Actions

GOOGLE_CHAT_SEND_MESSAGE

Send a message to a Google Chat space.

Parameters:

• text (string): Message content
• space (string): Target space name (e.g., spaces/AAAA...)
• thread (string, optional): Thread name to reply in

GOOGLE_CHAT_SEND_REACTION

Add or remove an emoji reaction to a message.

Parameters:

• emoji (string): Unicode emoji character
• messageName (string): Target message resource name
• remove (boolean): Whether to remove the reaction

GOOGLE_CHAT_LIST_SPACES

List all spaces the bot is a member of.

Providers

googleChatSpaceState

Provides context about the current Google Chat space:

• space_name: Space resource name
• space_display_name: Human-readable space name
• space_type: DM, ROOM, or SPACE
• is_threaded: Whether space uses threads
• is_direct: Whether this is a direct message

googleChatUserContext

Provides information about the current user:

• user_name: User resource name
• display_name: User's display name
• email: User's email address
• user_type: HUMAN or BOT

Events

Event	Description
GOOGLE_CHAT_MESSAGE_RECEIVED	Message received from a space
GOOGLE_CHAT_MESSAGE_SENT	Message sent successfully
GOOGLE_CHAT_SPACE_JOINED	Bot added to a space
GOOGLE_CHAT_SPACE_LEFT	Bot removed from a space
GOOGLE_CHAT_REACTION_SENT	Reaction added successfully
GOOGLE_CHAT_CONNECTION_READY	Service connected and ready

Message Limits

• Maximum message length: 4,000 characters
• Attachments: 20 MB per file (configurable)
• Messages exceeding the limit are automatically chunked

Webhook Security

The plugin verifies incoming webhook requests using Google's authentication:

1. App URL mode: Verifies ID token against the configured app URL
2. Project Number mode: Verifies JWT with Google's public certificates

Requests that fail verification are rejected with 401 Unauthorized.

Resource Names

Google Chat uses resource names for identifying entities:

• Spaces: spaces/{space_id}
• Messages: spaces/{space_id}/messages/{message_id}
• Users: users/{user_id} or users/app for the bot
• Threads: spaces/{space_id}/threads/{thread_id}
• Reactions: spaces/{space_id}/messages/{message_id}/reactions/{reaction_id}

Troubleshooting

Authentication Issues

1. Verify service account JSON is valid
2. Check that the Chat API is enabled
3. Ensure the service account has Chat API permissions
4. Verify audience type and value match your Chat app configuration

Webhook Not Receiving Messages

1. Verify your webhook URL is accessible from the internet
2. Check that the webhook path matches your configuration
3. Ensure your server responds with 200 OK to POST requests
4. Verify the Chat app is properly configured in Cloud Console

Permission Denied

1. Check service account permissions
2. Verify the bot is added to the target space
3. Ensure proper IAM roles are assigned

Multi-language Support

This plugin provides parallel implementations in:

• TypeScript: Primary implementation with full feature support
• Python: Feature-complete using aiohttp and google-auth
• Rust: Full implementation using reqwest and async runtime

All implementations maintain consistent:

• Type definitions
• Action interfaces
• Provider outputs
• Event types
• Error handling

License

MIT License - see LICENSE for details.