Feishu Image Sender

Send images to Feishu (Lark) conversations. This skill works both inside OpenClaw and as a standalone CLI tool.

When to use this skill

• User asks to "截图发给我" (send me a screenshot)
• User wants to share any image file through Feishu
• Need to send visual content (charts, diagrams, photos) via Feishu
• OpenClaw's built-in message tool fails to send images

Configuration

For OpenClaw Users

When running inside OpenClaw, this skill automatically reads credentials from OpenClaw's Feishu configuration. No manual setup required.

For Standalone Usage

Set the following environment variables:

export FEISHU_APP_ID="cli_xxxxxxxxxxxxxxxx"
export FEISHU_APP_SECRET="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

Or create a .env file in your project root:

FEISHU_APP_ID=cli_xxxxxxxxxxxxxxxx
FEISHU_APP_SECRET=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Note: If running outside OpenClaw without credentials configured, this skill will display a clear error message with setup instructions.

Feishu App Setup

1. Go to Feishu Developer Console
2. Create a new app (Enterprise self-built app)
3. Enable the following permissions:
   • im:resource - Upload images
   • im:message - Send messages
4. Get your App ID and App Secret from the app credentials page
5. Publish the app and make it available to your organization

Usage

As a Skill in OpenClaw

The skill will automatically use OpenClaw's Feishu configuration:

// Example: User asks to "send me a screenshot"
// The skill will automatically:
// 1. Read OpenClaw config for Feishu credentials
// 2. Upload the screenshot to Feishu
// 3. Send it to the user

As a CLI Tool

Send an image to a Feishu user:

node feishu-image.js --image /path/to/screenshot.png --to ou_xxxxxxxx

With an optional message:

node feishu-image.js --image chart.png --to ou_xxxxxxxx --text "Q4 Sales Report"

Send to a chat group:

node feishu-image.js --image announcement.png --to oc_xxxxxxxx --chat

As a Node.js Library

const { FeishuImage } = require('./scripts/feishu-image.js');

const sender = new FeishuImage({
  appId: 'cli_xxxxxxxxxxxxxxxx',
  appSecret: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
});

// Send image to a user
await sender.sendImage({
  imagePath: '/path/to/screenshot.png',
  receiveId: 'ou_xxxxxxxx',
  receiveType: 'user'
});

// Send image with text
await sender.sendImage({
  imagePath: '/path/to/chart.png',
  receiveId: 'ou_xxxxxxxx',
  receiveType: 'user',
  text: 'Here is the sales report'
});

CLI Reference

Options

Option	Short	Description	Required
--image	-i	Path to the image file	Yes
--to	-t	Recipient's Feishu open_id or chat_id	Yes
--text		Optional text message to include	No
--chat	-c	Send to a chat group (default: user)	No
--help	-h	Show help message	No

Examples

# Basic usage
node feishu-image.js -i screenshot.png -t ou_123456

# With message
node feishu-image.js --image chart.png --to ou_123456 --text "Q4 Report"

# To group chat
node feishu-image.js -i announcement.png -t oc_789012 --chat

Library API Reference

new FeishuImage(config)

Creates a new Feishu Image sender instance.

Parameters:

• config.appId (string): Feishu app ID
• config.appSecret (string): Feishu app secret
• config.baseUrl (string, optional): API base URL, defaults to 'https://open.feishu.cn/open-apis'

Example:

const sender = new FeishuImage({
  appId: process.env.FEISHU_APP_ID,
  appSecret: process.env.FEISHU_APP_SECRET
});

async sendImage(options)

Uploads an image and sends it to a Feishu conversation.

Parameters:

• options.imagePath (string, required): Path to the local image file
• options.receiveId (string, required): Recipient's open_id (for users) or chat_id (for groups)
• options.receiveType (string, optional): 'user' or 'chat', defaults to 'user'
• options.text (string, optional): Optional text message to send with the image

Returns: Promise - The ID of the sent message

Throws:

• FeishuImageError - Various error codes: MISSING_CREDENTIALS, AUTH_FAILED, FILE_NOT_FOUND, UPLOAD_FAILED, SEND_FAILED

Example:

try {
  const messageId = await sender.sendImage({
    imagePath: '/path/to/screenshot.png',
    receiveId: 'ou_xxxxxxxx',
    receiveType: 'user',
    text: 'Here is the screenshot you requested'
  });
  console.log('Image sent successfully, message ID:', messageId);
} catch (error) {
  console.error('Failed to send image:', error.message);
}

Error Handling

All errors are instances of FeishuImageError with specific error codes:

Error Code	Description	Solution
MISSING_CREDENTIALS	FEISHU_APP_ID or FEISHU_APP_SECRET not set	Set environment variables or pass to constructor
AUTH_FAILED	Authentication with Feishu API failed	Check app_id and app_secret are correct
FILE_NOT_FOUND	Image file does not exist	Check the image path is correct
UPLOAD_FAILED	Image upload to Feishu failed	Check network connection and file size limits
SEND_FAILED	Message sending failed	Check recipient ID and permissions

Example error handling:

const { FeishuImage, FeishuImageError } = require('./scripts/feishu-image.js');

try {
  await sender.sendImage({ ... });
} catch (error) {
  if (error instanceof FeishuImageError) {
    switch (error.code) {
      case 'MISSING_CREDENTIALS':
        console.error('Please set FEISHU_APP_ID and FEISHU_APP_SECRET');
        break;
      case 'AUTH_FAILED':
        console.error('Invalid credentials. Check your app ID and secret.');
        break;
      case 'FILE_NOT_FOUND':
        console.error(`Image file not found: ${error.details.path}`);
        break;
      default:
        console.error(`Error: ${error.message}`);
    }
  } else {
    console.error('Unexpected error:', error);
  }
}

Limitations

• Image size: Subject to Feishu API limits (check Feishu documentation for current limits)
• Supported formats: PNG, JPG, GIF (as supported by Feishu)
• Rate limiting: Subject to Feishu API rate limits

See Also

• Feishu Open Platform Documentation
• Feishu Image Upload API
• Feishu Message Send API
• Peekaboo - Screenshot Tool (if applicable)