io.github.mharnett/reddit-ads

mcp-reddit-ads

MCP server for Reddit Ads API v3 -- campaign management, ad creation, performance reporting, and audience targeting via Claude.

Features

• 18 tools covering full CRUD for campaigns, ad groups, and ads
• Performance reports with daily breakdowns
• Subreddit, interest, and geographic targeting
• Bulk pause/enable operations
• Safe by default: all new entities created in PAUSED status
• Budget inputs in dollars (auto-converts to Reddit's microcurrency format)

Installation

npm install mcp-reddit-ads

Or clone the repository:

git clone https://github.com/mharnett/mcp-reddit-ads.git
cd mcp-reddit-ads
npm install
npm run build

Configuration

Security: Never share your .mcp.json file or commit it to git -- it may contain API credentials. Add .mcp.json to your .gitignore.

1. Reddit OAuth App

Create a Reddit OAuth app at reddit.com/prefs/apps:

• Select "script" type
• Note the client ID and client secret
• Obtain a refresh token with adsread adsedit read scopes

2. Environment Variables

Set credentials via environment variables:

Read-only by default

As of v1.1.0 the MCP starts in read-only mode. The 10 read/report/targeting tools are always exposed, but the 8 mutating tools (create/update campaigns, ad groups, ads, and bulk pause/enable) are hidden from the tool list and refused at call time unless REDDIT_ADS_MCP_WRITE=true is set in the server's environment. This guards against a casual chat message accidentally mutating live ad spend. Enable writes deliberately, for the sessions where you actually intend to ship changes.

3. Config File

Copy config.example.json to config.json and fill in defaults:

{
  "reddit_api": {
    "base_url": "https://ads-api.reddit.com/api/v3",
    "auth": {
      "client_id": "",
      "client_secret": "",
      "refresh_token": "",
      "user_agent": "reddit-ad-mcp/1.0"
    }
  },
  "defaults": {
    "account_id": "",
    "business_id": "",
    "report_metrics": ["impressions", "clicks", "spend", "ctr", "cpc", "ecpm"],
    "date_range_days": 7
  }
}

Environment variables take precedence over config file values.

Usage

Claude Code (.mcp.json)

{
  "mcpServers": {
    "reddit-ads": {
      "command": "node",
      "args": ["/path/to/mcp-reddit-ads/dist/index.js"],
      "env": {
        "REDDIT_CLIENT_ID": "$(security find-generic-password -a reddit-ads-mcp -s REDDIT_CLIENT_ID -w)",
        "REDDIT_CLIENT_SECRET": "$(security find-generic-password -a reddit-ads-mcp -s REDDIT_CLIENT_SECRET -w)",
        "REDDIT_REFRESH_TOKEN": "$(security find-generic-password -a reddit-ads-mcp -s REDDIT_REFRESH_TOKEN -w)"
      }
    }
  }
}

Claude Desktop: Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Tools

Context

Read

Write: Campaigns

Write: Ad Groups

Write: Ads

Bulk Operations

Targeting

Key Conventions

• Spend values are returned from the API in microcurrency (1 dollar = 1,000,000 microcurrency units). Divide by 1,000,000 to get dollar amounts. Budget inputs accept dollars and auto-convert.
• Dates and times use ISO 8601 format (YYYY-MM-DDTHH:MM:SSZ).
• New entities default to PAUSED status. Explicitly set status to ACTIVE to go live.
• Report metrics default to the set configured in config.json but can be overridden per request.

Architecture

• Resilience: Uses cockatiel for retry policies and circuit breaking on API calls
• Logging: Structured logging via pino
• Response truncation: Large API responses are truncated at 200KB to stay within MCP message limits
• Auth: OAuth 2.0 refresh token flow with automatic access token renewal

License

MIT -- see LICENSE.

Author

Built by Mark Harnett / drak-marketing.