Reddit MCP Server

A Model Context Protocol (MCP) server that provides AI assistants with access to Reddit data. Built on top of redd — no API keys required.

https://github.com/user-attachments/assets/af8ae52c-f9f3-4d04-80d5-4be0dfa61b0f

Table of Contents

1. Features
2. Quick Start
3. Available Tools
4. Configuration
5. Architecture
6. Contributing
7. License

1. Features

• 🔍 Search — Search all of Reddit or within a specific subreddit
• 📰 Subreddit Posts — Browse hot, top, new, or rising posts from any subreddit
• 📖 Post Details — Get full post content with nested comment trees
• 👤 User Activity — View a user's recent posts and comments
• 📝 User Posts — Get a user's submitted posts

No API keys, no authentication, no browser required. Just install and run.

2. Quick Start

2.1. Using uvx (recommended)

The fastest way to run the server — no clone needed:

# stdio transport (default, for Claude Desktop / Cursor / etc.)
uvx reddit-no-auth-mcp-server

# HTTP transport
uvx reddit-no-auth-mcp-server \
  --transport streamable-http \
  --port 8000

2.2. From source

git clone https://github.com/eliasbiondo/reddit-mcp-server.git
cd reddit-mcp-server
uv sync

Run the server:

# stdio transport (default)
uv run reddit-no-auth-mcp-server

# HTTP transport
uv run reddit-no-auth-mcp-server \
  --transport streamable-http \
  --port 8000

2.3. MCP Client Configuration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "reddit": {
      "command": "uvx",
      "args": ["reddit-no-auth-mcp-server"]
    }
  }
}

Cursor

Add to your .cursor/mcp.json:

{
  "mcpServers": {
    "reddit": {
      "command": "uvx",
      "args": ["reddit-no-auth-mcp-server"]
    }
  }
}

From source (any MCP client)

{
  "mcpServers": {
    "reddit": {
      "command": "uv",
      "args": [
        "--directory", "/path/to/reddit-mcp-server",
        "run", "reddit-no-auth-mcp-server"
      ]
    }
  }
}

3. Available Tools

| Tool | Description | Key Arguments | |------|-------------|---------------| | search | Search Reddit for posts | query, limit, sort | | search_subreddit | Search within a subreddit | subreddit, query, limit, sort | | get_post | Get post details + comment tree | permalink | | get_subreddit_posts | Get subreddit listing | subreddit, limit, category, time_filter | | get_user | Get user's activity feed | username, limit | | get_user_posts | Get user's submitted posts | username, limit, category, time_filter |

Tool Details

search

Search all of Reddit for posts matching a query.

query: "python async programming"
limit: 10
sort: "relevance"  # relevance, hot, top, new, comments

search_subreddit

Search within a specific subreddit.

subreddit: "Python"
query: "web scraping"
limit: 10
sort: "top"

get_post

Get full details of a Reddit post including its comment tree.

permalink: "/r/Python/comments/abc123/my_post/"

get_subreddit_posts

Get posts from a subreddit listing.

subreddit: "MachineLearning"
limit: 25
category: "hot"       # hot, top, new, rising
time_filter: "week"   # hour, day, week, month, year, all

get_user

Get a user's recent public activity (posts and comments).

username: "spez"
limit: 10

get_user_posts

Get a user's submitted posts.

username: "spez"
limit: 10
category: "top"       # hot, top, new
time_filter: "all"    # hour, day, week, month, year, all

4. Configuration

All settings can be configured via environment variables:

| Variable | Default | Description | |----------|---------|-------------| | REDDIT_TRANSPORT | stdio | MCP transport (stdio, streamable-http) | | REDDIT_HOST | 127.0.0.1 | Host for HTTP transport | | REDDIT_PORT | 8000 | Port for HTTP transport | | REDDIT_PATH | /mcp | Path for HTTP transport | | REDDIT_LOG_LEVEL | WARNING | Log level (DEBUG, INFO, WARNING, ERROR) | | REDDIT_PROXY | — | HTTP/HTTPS proxy URL | | REDDIT_TIMEOUT | 10.0 | Request timeout in seconds | | REDDIT_THROTTLE_MIN | 1.0 | Min delay between paginated requests (seconds) | | REDDIT_THROTTLE_MAX | 2.0 | Max delay between paginated requests (seconds) |

CLI arguments take precedence over environment variables:

uv run reddit-no-auth-mcp-server \
  --transport streamable-http \
  --port 9000 \
  --log-level DEBUG

5. Architecture

This project follows hexagonal architecture (ports & adapters):

src/reddit_mcp_server/
├── domain/                # Pure business logic, no framework imports
│   ├── exceptions.py      # Domain exception hierarchy
│   └── value_objects.py   # Immutable config objects
├── ports/                 # Abstract interfaces (contracts)
│   ├── config.py          # ConfigPort
│   └── reddit.py          # RedditPort
├── application/           # Use cases (orchestration)
│   ├── search.py
│   ├── search_subreddit.py
│   ├── get_post.py
│   ├── get_user.py
│   ├── get_subreddit_posts.py
│   └── get_user_posts.py
├── adapters/
│   ├── inbound/           # Presentation layer
│   │   ├── cli.py         # CLI entry point
│   │   ├── mcp_server.py
│   │   ├── error_mapping.py
│   │   ├── serialization.py
│   │   └── mcp_tools/     # MCP tool definitions
│   └── outbound/          # Infrastructure layer
│       ├── env_config.py  # ConfigPort implementation
│       └── redd_client.py # RedditPort implementation (wraps redd)
└── container.py           # DI composition root

6. Contributing

Contributions are welcome. Please read CONTRIBUTING.md for guidelines on setting up the project, running tests, and submitting changes.

7. License

MIT