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:

Variable	Description
REDDIT_CLIENT_ID	OAuth app client ID
REDDIT_CLIENT_SECRET	OAuth app client secret
REDDIT_REFRESH_TOKEN	OAuth refresh token with ads scopes
REDDIT_ADS_MCP_WRITE	Set to true to enable mutating tools (create/update/pause/enable). Unset = read-only (default).

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

Tool	Description
reddit_ads_get_client_context	Get account info and verify API connectivity
reddit_ads_get_accounts	List all ad accounts accessible to the authenticated user

Read

Tool	Description
reddit_ads_get_campaigns	List campaigns with optional status filter
reddit_ads_get_ad_groups	List ad groups for a campaign
reddit_ads_get_ads	List ads for an ad group
reddit_ads_get_performance_report	Aggregated performance metrics for campaigns/ad groups/ads
reddit_ads_get_daily_performance	Day-by-day performance breakdown

Write: Campaigns

Tool	Description
reddit_ads_create_campaign	Create a new campaign (PAUSED by default)
reddit_ads_update_campaign	Update campaign name, budget, objective, or status

Write: Ad Groups

Tool	Description
reddit_ads_create_ad_group	Create a new ad group with targeting (PAUSED by default)
reddit_ads_update_ad_group	Update ad group bid, targeting, or status

Write: Ads

Tool	Description
reddit_ads_create_ad	Create a new ad with headline, body, URL, and media (PAUSED by default)
reddit_ads_update_ad	Update ad creative or status

Bulk Operations

Tool	Description
reddit_ads_pause_items	Pause multiple campaigns, ad groups, or ads at once
reddit_ads_enable_items	Enable multiple campaigns, ad groups, or ads at once

Targeting

Tool	Description
reddit_ads_search_subreddits	Search for subreddits by keyword for targeting
reddit_ads_get_interest_categories	List available interest categories for targeting
reddit_ads_search_geo_targets	Search for geographic targeting options (countries, regions, metros)

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.