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openclaw - 💡(How to fix) Fix Telegram channel cannot send images via read tool [3 comments, 4 participants]

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openclaw/openclaw#48979•Fetched 2026-04-08 00:50:12
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claw-no-308claw-no-308
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Fix Action

Workaround

Directly calling Telegram Bot API works:

$url = "https://api.telegram.org/bot<TOKEN>/sendPhoto"
$form = @{ 
    chat_id = "<CHAT_ID>"
    photo = Get-Item "<IMAGE_PATH>"
    caption = "Description"
}
Invoke-RestMethod -Uri $url -Method Post -Form $form

This successfully sends the image.

Code Example

$url = "https://api.telegram.org/bot<TOKEN>/sendPhoto"
$form = @{ 
    chat_id = "<CHAT_ID>"
    photo = Get-Item "<IMAGE_PATH>"
    caption = "Description"
}
Invoke-RestMethod -Uri $url -Method Post -Form $form

---

read path/to/image.png
RAW_BUFFERClick to expand / collapse

Bug Description

When using the read tool to read an image file and trying to send it through Telegram channel, the image is not delivered to the user. The read tool successfully reads the image (returns image metadata), but the image attachment is not included in the Telegram message.

Workaround

Directly calling Telegram Bot API works:

$url = "https://api.telegram.org/bot<TOKEN>/sendPhoto"
$form = @{ 
    chat_id = "<CHAT_ID>"
    photo = Get-Item "<IMAGE_PATH>"
    caption = "Description"
}
Invoke-RestMethod -Uri $url -Method Post -Form $form

This successfully sends the image.

Environment

  • OpenClaw Version: 2026.3.8
  • Channel: Telegram
  • Bot: @Home308_bot
  • OS: Windows 11
  • Node: v24.11.1

Expected Behavior

When using:

read path/to/image.png

The image should be attached and sent to the Telegram user.

Actual Behavior

The image is read (tool returns image metadata with size and dimensions), but no image is received on Telegram. Only text responses work.

Impact

This limits the AI assistant's ability to:

  • Share screenshots from test failures
  • Send visual reports
  • Share diagrams or charts
  • Send any visual content to users

Priority

High - Image sharing is essential for an AI assistant, especially for:

  • Test automation (sharing failure screenshots)
  • Debugging (sharing visual context)
  • Reporting (sharing charts/graphs)

extent analysis

Fix Plan

To fix the issue of images not being sent through the Telegram channel, we need to modify the read tool to properly attach the image file when sending the message.

Here are the steps:

  • Update the read tool to use the Telegram Bot API directly, similar to the provided workaround.
  • Modify the read tool to send the image file as a form attachment.

Example code:

# Assuming the read tool is a PowerShell script
param ($path)

$url = "https://api.telegram.org/bot<TOKEN>/sendPhoto"
$form = @{ 
    chat_id = "<CHAT_ID>"
    photo = Get-Item $path
    caption = "Image from read tool"
}
Invoke-RestMethod -Uri $url -Method Post -Form $form

Replace <TOKEN> and <CHAT_ID> with your actual Telegram bot token and chat ID.

Verification

To verify that the fix worked, try using the updated read tool to send an image file:

read path/to/image.png

The image should now be received on Telegram.

Extra Tips

  • Make sure to handle errors and exceptions properly when sending the image file.
  • Consider adding logging to track any issues with sending images.
  • Update the read tool documentation to reflect the changes and provide examples of usage.

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openclaw - 💡(How to fix) Fix Telegram channel cannot send images via read tool [3 comments, 4 participants]