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reddit-automation

Automate Reddit tasks via Rube MCP (Composio): search subreddits, create posts, manage comments, and browse top content. Always search tools first for current schemas.

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name:reddit-automationdescription:"Automate Reddit tasks via Rube MCP (Composio): search subreddits, create posts, manage comments, and browse top content. Always search tools first for current schemas."requires:mcp:[rube]

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 terms

  • subreddit: 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 title

  • text: 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 content

  • thing_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 name

  • time_filter: Time range for top posts ('hour', 'day', 'week', 'month', 'year', 'all')

  • limit: Number of posts to retrieve

  • post_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)
  • Use fullname as parent_id when commenting

  • 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
  • Find matching flair by text or category

  • Extract flair_id

  • 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

    TaskTool SlugKey Params
    Search RedditREDDIT_SEARCH_ACROSS_SUBREDDITSquery, subreddit, sort, time_filter
    Create postREDDIT_CREATE_REDDIT_POSTsubreddit, title, text/url
    Get post commentsREDDIT_RETRIEVE_POST_COMMENTSpost_id
    Add commentREDDIT_POST_REDDIT_COMMENTparent_id, body
    Edit comment/postREDDIT_EDIT_REDDIT_COMMENT_OR_POSTthing_id, body
    Delete commentREDDIT_DELETE_REDDIT_COMMENTthing_id
    Delete postREDDIT_DELETE_REDDIT_POSTthing_id
    Get top postsREDDIT_GET_R_TOPsubreddit, time_filter, limit
    Browse subredditREDDIT_GETsubreddit
    Get post detailsREDDIT_RETRIEVE_REDDIT_POSTpost_id
    Get specific commentREDDIT_RETRIEVE_SPECIFIC_COMMENTcomment_id
    List post flairsREDDIT_LIST_SUBREDDIT_POST_FLAIRSsubreddit
    Get user flairREDDIT_GET_USER_FLAIRsubreddit