Slack Message Scraper

Extract messages from Slack channels using browser tokens. Supports public channels, private channels, DMs, group messages, threads, reactions, and file attachments. No OAuth app installation required.

How It Works

This actor uses the Slack Web API with browser tokens (the same approach used by slackdump) to extract messages from any Slack channel you have access to. You provide your browser token and cookie, and the actor handles pagination, rate limiting, and user resolution automatically.

Two actions are available:

• Scrape Messages -- Extract messages from a specific channel, with optional thread replies, user details, and date filtering
• Scrape Channel List -- List all channels accessible to your account (public, private, DMs, group messages)

Authentication Setup

The actor requires two credentials from your Slack browser session:

1. Get your Slack Token (xoxc-...)

1. Open Slack in your web browser at https://app.slack.com
2. Open DevTools (F12 or Ctrl+Shift+I)
3. Go to Application > Local Storage > https://app.slack.com
4. Search for a value starting with xoxc-
5. Copy the entire value

2. Get your Slack Cookie (xoxd-...)

1. In the same DevTools window, go to Application > Cookies > https://app.slack.com
2. Find the cookie named d
3. Copy its value (starts with xoxd-)

Finding a Channel ID

1. Open the channel in Slack
2. Right-click the channel name and select Copy link
3. The channel ID is the last segment of the URL (e.g., C01ABCDEF from https://workspace.slack.com/archives/C01ABCDEF)

Input Parameters

Parameter	Type	Required	Default	Description
action	string	Yes	-	Scrape Messages or Scrape Channel List
token	string	Yes	-	Slack browser token (xoxc-...)
cookie	string	Yes	-	Slack d cookie (xoxd-...)
channelId	string	For messages	-	Channel ID to scrape (e.g., C01ABCDEF)
maxItems	integer	No	100	Maximum messages to extract (0 = no limit)
includeThreadReplies	boolean	No	false	Fetch all replies for threaded messages
includeUserDetails	boolean	No	true	Resolve user IDs to display names
oldestTimestamp	string	No	-	Only fetch messages after this date (ISO format)
latestTimestamp	string	No	-	Only fetch messages before this date (ISO format)

Output Fields

Each message record includes:

Field	Type	Description
channel_id	string	Slack channel ID
channel_name	string	Channel name
channel_type	string	public_channel, private_channel, im, mpim, or group
message_ts	string	Slack message timestamp (unique ID)
thread_ts	string	Parent message timestamp (if threaded reply)
text	string	Message text content
user_id	string	Author's Slack user ID
user_name	string	Author's display name
user_real_name	string	Author's real name
message_type	string	Message type (message, bot_message, etc.)
subtype	string	Message subtype (channel_join, file_share, etc.)
reactions	array	Emoji reactions (e.g., "thumbsup:3")
reply_count	integer	Number of thread replies
files	array	Attached files (name, size, URL)
is_edited	boolean	Whether the message was edited
timestamp_iso	string	ISO 8601 timestamp

Use Cases

• Workspace backup -- Archive channel history before leaving a workspace
• Compliance archival -- Export messages for legal or regulatory retention
• Knowledge base extraction -- Feed Slack conversations into AI training data or documentation
• Migration -- Export messages when moving from Slack to another platform
• Analytics -- Analyze communication patterns, response times, or topic trends

Rate Limiting

The actor respects Slack's API rate limits (Tier 2/3: ~20-50 requests per minute). It uses a conservative delay between requests and handles HTTP 429 responses with automatic retry. Large channel histories will take longer due to these limits.

Terms of Service

This tool is intended for users extracting their own workspace data for backup, migration, or archival purposes. Users are responsible for complying with their organization's policies and Slack's Terms of Service. The actor only accesses data that the authenticated user already has permission to view.

Need More Features?

If you need additional data fields, custom output formats, or a scraper for another platform, file an issue or get in touch. We customize scrapers to fit specific requirements.