Reddit MCP Server

Reddit MCP Server

A Model Context Protocol (MCP) server for interacting with Reddit - fetch posts, comments, user info, and create content.

Features at a Glance

Quick Start

Option 1: Claude Desktop Extension (Easiest)

Download and open the extension file - Claude Desktop will install it automatically:

Download reddit-mcp-server.mcpb

Option 2: NPX (No install required)

Add to your MCP config (Claude Desktop, Cursor, etc.) with Reddit OAuth credentials:

{
  "mcpServers": {
    "reddit": {
      "command": "npx",
      "args": ["reddit-mcp-server"],
      "env": {
        "REDDIT_CLIENT_ID": "your_client_id",
        "REDDIT_CLIENT_SECRET": "your_client_secret"
      }
    }
  }
}

Option 3: Claude Code

REDDIT_CLIENT_ID=your_client_id REDDIT_CLIENT_SECRET=your_client_secret \
  claude mcp add --transport stdio reddit -- npx reddit-mcp-server

Features

Read-only Tools

Write Tools (Require User Credentials)

Configuration

Environment Variables

Reddit closed self-service app creation in November 2025. See Authentication for how to get credentials.

Full MCP Config Example

{
  "mcpServers": {
    "reddit": {
      "command": "npx",
      "args": ["reddit-mcp-server"],
      "env": {
        "REDDIT_CLIENT_ID": "your_client_id",
        "REDDIT_CLIENT_SECRET": "your_client_secret",
        "REDDIT_USERNAME": "your_username",
        "REDDIT_PASSWORD": "your_password",
        "REDDIT_SAFE_MODE": "standard"
      }
    }
  }
}

Safe Mode (Spam Protection)

Protect your Reddit account from spam detection and bans with built-in safeguards. Enabled by default (standard mode) per Reddit's Responsible Builder Policy.

Why Use Safe Mode?

Reddit's spam detection can flag accounts for:

• Rapid posting or commenting
• Duplicate or similar content
• Posting the same content across multiple subreddits
• Non-standard User-Agent strings

Safe Mode helps prevent these issues automatically.

Mode Options

Disable Safe Mode

Safe mode is enabled by default. To explicitly disable:

export REDDIT_SAFE_MODE=off
npx reddit-mcp-server

What Safe Mode Does

1. Rate Limiting: Enforces minimum delays between write operations
2. Duplicate Detection: Blocks identical content from being posted twice
3. Cross-Subreddit Detection: Prevents posting the same content to multiple subreddits (per Reddit policy)
4. Smart User-Agent: Auto-generates Reddit-compliant User-Agent format when username is provided

Bot Disclosure

Reddit's Responsible Builder Policy requires bots to disclose their automated nature. Enable automatic bot footers on all posted content:

export REDDIT_BOT_DISCLOSURE=auto
npx reddit-mcp-server

When enabled, a footer is appended to all posts, replies, and edits:

---
🤖 I am a bot | Built with reddit-mcp-server

Customize the footer with REDDIT_BOT_FOOTER:

export REDDIT_BOT_DISCLOSURE=auto
export REDDIT_BOT_FOOTER=$'\n\n---\n^(🤖 Custom bot footer text)'

Authentication

⚠️ Reddit API Changes (2026)

Anonymous mode no longer works. As of mid-2026, Reddit blocks all unauthenticated API requests with HTTP 403. OAuth credentials are now required for any API access.

Reddit is shutting down its public API and RSS feeds. Reddit announced on 2026-09-30 that it stops accepting new public API access requests on 2026-10-31, ends RSS feeds on 2026-11-13, starts removing unregistered apps on 2027-01-12, and closes public API access in March 2027. Without credentials, this server already reads from the Arctic Shift archive (see Keyless Mode).

Additionally, Reddit closed self-service OAuth app creation in November 2025. New developers must request access through Reddit's Developer Support. Existing OAuth credentials (obtained before November 2025) continue to work.

Getting Credentials

If you already have a Reddit app (created at /prefs/apps before November 2025): use your existing client ID and secret — they still work at 60-100 req/min.

If you need new credentials: submit a request through Reddit's Developer Support describing your use case. Approval is required and may take time.

Mode Comparison

Keyless Mode

Without OAuth credentials, reads come from two free sources:

• Reddit's RSS feeds for ranked listings (hot, top, rising, controversial, and the home feed). Reddit retires RSS on 2026-11-13. When a feed fails for a named subreddit, the server falls back to the archive's newest posts and says ranking is unavailable.
• The Arctic Shift archive, a free third-party copy of Reddit run by one volunteer. It is not Reddit's API and has no uptime guarantee.

Archive caveats: scores and comment counts lag, and are often 0 or 1 on recent posts. Keyword search on large subreddits is slow, and the archive throttles it. The server waits up to 10 seconds and retries once. If that fails too, the error says when to retry. Every archive result ends with a note naming the source.

Still needs OAuth: get_trending_subreddits, get_post_flairs, get_me, get_my_overview, get_my_saved, and all write tools.

Read-Only Access (OAuth)

{
  "env": {
    "REDDIT_CLIENT_ID": "your_client_id",
    "REDDIT_CLIENT_SECRET": "your_client_secret"
  }
}

Write Operations (OAuth + User Credentials)

To create posts, reply, edit, or delete content, add your Reddit username and password:

{
  "env": {
    "REDDIT_CLIENT_ID": "your_client_id",
    "REDDIT_CLIENT_SECRET": "your_client_secret",
    "REDDIT_USERNAME": "your_username",
    "REDDIT_PASSWORD": "your_password",
    "REDDIT_SAFE_MODE": "standard"
  }
}

Development

Commands

pnpm install        # Install dependencies
pnpm build          # Build TypeScript
pnpm dev            # Build and run MCP inspector
pnpm test           # Run tests
pnpm lint           # Lint code
pnpm format         # Format code

CLI Options

npx reddit-mcp-server --version         # Show version
npx reddit-mcp-server --help            # Show help
npx reddit-mcp-server --generate-token  # Generate OAuth token for HTTP mode

HTTP Server Mode

For Docker deployments or web-based clients, use HTTP transport:

TRANSPORT_TYPE=httpStream PORT=3000 node dist/index.js

With OAuth Protection

export OAUTH_ENABLED=true
export OAUTH_TOKEN=$(npx reddit-mcp-server --generate-token | tail -1)
TRANSPORT_TYPE=httpStream node dist/index.js

Make authenticated requests:

curl -H "Authorization: Bearer $OAUTH_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{"method":"tools/list","params":{}}' \
     http://localhost:3000/mcp

Docker

Quick Start

# Pull and run
docker pull ghcr.io/jordanburke/reddit-mcp-server:latest

docker run -d \
  --name reddit-mcp \
  -p 3000:3000 \
  -e REDDIT_CLIENT_ID=your_client_id \
  -e REDDIT_CLIENT_SECRET=your_client_secret \
  -e REDDIT_SAFE_MODE=standard \
  ghcr.io/jordanburke/reddit-mcp-server:latest

Docker Compose

services:
  reddit-mcp:
    image: ghcr.io/jordanburke/reddit-mcp-server:latest
    ports:
      - "3000:3000"
    environment:
      - REDDIT_CLIENT_ID=${REDDIT_CLIENT_ID}
      - REDDIT_CLIENT_SECRET=${REDDIT_CLIENT_SECRET}
      - REDDIT_USERNAME=${REDDIT_USERNAME}
      - REDDIT_PASSWORD=${REDDIT_PASSWORD}
      - REDDIT_SAFE_MODE=standard
      - OAUTH_ENABLED=${OAUTH_ENABLED:-false}
      - OAUTH_TOKEN=${OAUTH_TOKEN}
    restart: unless-stopped

Build Locally

docker build -t reddit-mcp-server .
docker run -d --name reddit-mcp -p 3000:3000 --env-file .env reddit-mcp-server

Reddit Responsible Builder Policy

This server is designed with Reddit's Responsible Builder Policy in mind:

• Safe mode on by default — rate limiting and duplicate detection prevent spam
• Cross-subreddit duplicate detection — blocks identical content across subreddits
• Bot disclosure support — optional automated footer for transparency
• No voting/karma manipulation — upvote/downvote tools are intentionally excluded
• No private messaging — DM tools are intentionally excluded
• Policy-aware AI instructions — MCP server instructions remind AI assistants of data usage restrictions

Credits

• Fork of reddit-mcp-server by Alexandros Lekkas
• Inspired by Python Reddit MCP Server by Arindam200