| name | reddit-automation |
| description | Automate Reddit tasks via Rube MCP (Composio): search subreddits, create posts, manage comments, and browse top content. Always search tools first for current schemas. |
| risk | unknown |
| source | community |
| date_added | 2026-02-27 |
Reddit Automation via Rube MCP
Automate Reddit operations through Composio's Reddit toolkit via Rube MCP.
Prerequisites
- Rube MCP must be connected (RUBE_SEARCH_TOOLS available)
- Active Reddit connection via
RUBE_MANAGE_CONNECTIONS with toolkit reddit
- Always call
RUBE_SEARCH_TOOLS first to get current tool schemas
Setup
Get Rube MCP: Add https://rube.app/mcp as an MCP server in your client configuration. No API keys needed — just add the endpoint and it works.
- Verify Rube MCP is available by confirming
RUBE_SEARCH_TOOLS responds
- Call
RUBE_MANAGE_CONNECTIONS with toolkit reddit
- If connection is not ACTIVE, follow the returned auth link to complete Reddit OAuth
- Confirm connection status shows ACTIVE before running any workflows
Core Workflows
1. Search Reddit
When to use: User wants to find posts across subreddits
Tool sequence:
REDDIT_SEARCH_ACROSS_SUBREDDITS - Search for posts matching a query [Required]
Key parameters:
query: Search termssubreddit: Limit search to a specific subreddit (optional)sort: Sort results by 'relevance', 'hot', 'top', 'new', 'comments'time_filter: Time range ('hour', 'day', 'week', 'month', 'year', 'all')limit: Number of results to return
Pitfalls:
- Search results may not include very recent posts due to indexing delay
- The
time_filter parameter only works with certain sort options
- Results are paginated; use after/before tokens for additional pages
- NSFW content may be filtered based on account settings
2. Create Posts
When to use: User wants to submit a new post to a subreddit
Tool sequence:
REDDIT_LIST_SUBREDDIT_POST_FLAIRS - Get available post flairs [Optional]REDDIT_CREATE_REDDIT_POST - Submit the post [Required]
Key parameters:
subreddit: Target subreddit name (without 'r/' prefix)title: Post titletext: Post body text (for text posts)url: Link URL (for link posts)flair_id: Flair ID from the subreddit's flair list
Pitfalls:
- Some subreddits require flair; use LIST_SUBREDDIT_POST_FLAIRS first
- Subreddit posting rules vary widely; karma/age restrictions may apply
- Text and URL are mutually exclusive; a post is either text or link
- Rate limits apply; avoid rapid successive post creation
- The subreddit name should not include 'r/' prefix
3. Manage Comments
When to use: User wants to comment on posts or manage existing comments
Tool sequence:
REDDIT_RETRIEVE_POST_COMMENTS - Get comments on a post [Optional]REDDIT_POST_REDDIT_COMMENT - Add a comment to a post or reply to a comment [Required]REDDIT_EDIT_REDDIT_COMMENT_OR_POST - Edit an existing comment [Optional]REDDIT_DELETE_REDDIT_COMMENT - Delete a comment [Optional]
Key parameters:
post_id: ID of the post (for retrieving or commenting on)parent_id: Full name of the parent (e.g., 't3_abc123' for post, 't1_xyz789' for comment)body: Comment text contentthing_id: Full name of the item to edit or delete
Pitfalls:
- Reddit uses 'fullname' format: 't1_' prefix for comments, 't3_' for posts
- Editing replaces the entire comment body; include all desired content
- Deleted comments show as '[deleted]' but the tree structure remains
- Comment depth limits may apply in some subreddits
4. Browse Subreddit Content
When to use: User wants to view top or trending content from a subreddit
Tool sequence:
REDDIT_GET_R_TOP - Get top posts from a subreddit [Required]REDDIT_GET - Get posts from a subreddit endpoint [Alternative]REDDIT_RETRIEVE_REDDIT_POST - Get full details for a specific post [Optional]
Key parameters:
subreddit: Subreddit nametime_filter: Time range for top posts ('hour', 'day', 'week', 'month', 'year', 'all')limit: Number of posts to retrievepost_id: Specific post ID for full details
Pitfalls:
- Top posts with time_filter='all' returns all-time top content
- Post details include the body text but comments require a separate call
- Some posts may be removed or hidden based on subreddit rules
- NSFW posts are included unless filtered at the account level
5. Manage Posts
When to use: User wants to edit or delete their own posts
Tool sequence:
REDDIT_EDIT_REDDIT_COMMENT_OR_POST - Edit a post's text content [Optional]REDDIT_DELETE_REDDIT_POST - Delete a post [Optional]REDDIT_GET_USER_FLAIR - Get user's flair in a subreddit [Optional]
Key parameters:
thing_id: Full name of the post (e.g., 't3_abc123')body: New text content (for editing)subreddit: Subreddit name (for flair)
Pitfalls:
- Only text posts can have their body edited; link posts cannot be modified
- Post titles cannot be edited after submission
- Deletion is permanent; deleted posts show as '[deleted]'
- User flair is per-subreddit and may be restricted
Common Patterns
Reddit Fullname Format
Prefixes:
t1_ = Comment (e.g., 't1_abc123')
t2_ = Account (e.g., 't2_xyz789')
t3_ = Post/Link (e.g., 't3_def456')
t4_ = Message
t5_ = Subreddit
Usage:
1. Retrieve a post to get its fullname (t3_XXXXX)
2. Use fullname as parent_id when commenting
3. Use fullname as thing_id when editing/deleting
Pagination
- Reddit uses cursor-based pagination with 'after' and 'before' tokens
- Set
limit for items per page (max 100)
- Check response for
after token
- Pass
after value in subsequent requests to get next page
Flair Resolution
1. Call REDDIT_LIST_SUBREDDIT_POST_FLAIRS with subreddit name
2. Find matching flair by text or category
3. Extract flair_id
4. Include flair_id when creating the post
Known Pitfalls
Rate Limits:
- Reddit enforces rate limits per account and per OAuth app
- Posting is limited to approximately 1 post per 10 minutes for new accounts
- Commenting has similar but less restrictive limits
- 429 errors should trigger exponential backoff
Content Rules:
- Each subreddit has its own posting rules and requirements
- Some subreddits are restricted or private
- Karma requirements may prevent posting in certain subreddits
- Auto-moderator rules may remove posts that match certain patterns
ID Formats:
- Always use fullname format (with prefix) for parent_id and thing_id
- Raw IDs without prefix will cause 'Invalid ID' errors
- Post IDs from search results may need 't3_' prefix added
Text Formatting:
- Reddit uses Markdown for post and comment formatting
- Code blocks, tables, and headers are supported
- Links use
text format
- Mention users with
u/username, subreddits with r/subreddit
Quick Reference
| Task | Tool Slug | Key Params |
|---|
| Search Reddit | REDDIT_SEARCH_ACROSS_SUBREDDITS | query, subreddit, sort, time_filter |
| Create post | REDDIT_CREATE_REDDIT_POST | subreddit, title, text/url |
| Get post comments | REDDIT_RETRIEVE_POST_COMMENTS | post_id |
| Add comment | REDDIT_POST_REDDIT_COMMENT | parent_id, body |
| Edit comment/post | REDDIT_EDIT_REDDIT_COMMENT_OR_POST | thing_id, body |
| Delete comment | REDDIT_DELETE_REDDIT_COMMENT | thing_id |
| Delete post | REDDIT_DELETE_REDDIT_POST | thing_id |
| Get top posts | REDDIT_GET_R_TOP | subreddit, time_filter, limit |
| Browse subreddit | REDDIT_GET | subreddit |
| Get post details | REDDIT_RETRIEVE_REDDIT_POST | post_id |
| Get specific comment | REDDIT_RETRIEVE_SPECIFIC_COMMENT | comment_id |
| List post flairs | REDDIT_LIST_SUBREDDIT_POST_FLAIRS | subreddit |
| Get user flair | REDDIT_GET_USER_FLAIR | subreddit |
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
