# SubSignal

> Reddit monitoring and lead generation platform for founders, marketers, and agencies.

SubSignal helps businesses turn Reddit conversations into paying customers. It monitors Reddit 24/7, surfaces high-intent leads, tracks brand mentions, and detects fake reviews and coordinated shill campaigns — all in one dashboard.

## What SubSignal does

- **Brand Monitoring**: Real-time alerts when your brand, product, or competitors are mentioned anywhere on Reddit.
- **Sales Lead Finder**: AI finds Reddit posts where people are actively looking for solutions like yours, scored by buying intent.
- **Brand Search**: Search all of Reddit for any keyword or brand name across 7, 30, or 90 days of history with AI filtering.
- **Sentiment Analysis**: Track how people feel about your brand over time and spot PR crises early.
- **Shill & Fake Review Detection**: Identify bot networks, coordinated campaigns, and AI-generated content masquerading as organic reviews.
- **User Profiler**: Deep-scan any Reddit account — posting patterns, product mentions, AI content score, and credibility verdict.
- **Reddit DM Automation**: Connect a Reddit account and send AI-personalized direct messages to leads without leaving SubSignal (Professional plan).
- **SEO Opportunities**: Find Reddit threads ranking on Google for your keywords — high-traffic threads perfect for organic brand mentions.
- **Developer API**: REST API over a continuously growing archive of 50M+ Reddit posts (~280k new per day) — real-time keyword mentions with sentiment, subreddit time series, AI-content rankings, account trust signals. Bearer-key auth, included in Growth and Professional.
- **Reddit MCP Server**: The same data as tools for AI assistants (Claude.ai, Claude Desktop, Claude Code, Cursor, any Model Context Protocol client). Hosted at https://api.subsignal.ai/mcp with OAuth 2.1 sign-in — no keys to paste.

## Reddit MCP Server (for AI assistants)

Add `https://api.subsignal.ai/mcp` as a custom connector / remote MCP server. The client discovers the OAuth authorization server automatically; the user signs in to SubSignal and approves. A plain `Authorization: Bearer sk_live_…` API key also works on the same URL for headless setups, or run it locally with `npx -y subsignal-mcp`.

Tools (each is one call to the corresponding /v1 endpoint, metered against the plan's monthly API quota):

- `search_reddit(q, days=90, limit=20, subreddit?, cursor?)` — ANY brand or phrase over the post archive, up to 12 months, no setup: counts by day, sentiment, top subreddits, purchase-intent share, recent posts with permalinks. Use first.
- `compare_brands(brands[2..6], days=90)` — side-by-side table: mentions, intent share, sentiment, top subreddits.
- `search_mentions(q, days=30, limit=20, cursor?)` — real-time mentions (posts + comments) of a keyword this account tracks, incl. how many were since removed from Reddit.
- `track_keyword(keyword)`, `list_keywords()`, `untrack_keyword(keyword)` — manage real-time tracking. No historical backfill: data accrues from the moment a keyword is tracked.
- `subreddit_intel(name)` — AI-content share, promoted products/links, top link-promoters (shill candidates).
- `subreddit_timeseries(name, grain=day|month, days=180)` — post volume, sentiment, AI-content share over time.
- `ai_content_rankings()` — subreddits ranked by share of AI-generated posts (20,777-post study).
- `reddit_user_profile(username, include_summary=false)` — shadow profile of a Reddit account with suspicion signals.

Not exposed as a tool: the public exposé report endpoint. Full guide: https://subsignal.ai/reddit-mcp-server — detailed reference: https://subsignal.ai/llms-full.txt

## Developer API

Base URL `https://api.subsignal.ai/api/v1`, `Authorization: Bearer sk_live_…`. Endpoints: GET /search (archive, any term, ≤365 days), GET /mentions, POST|GET|DELETE /keywords, GET /subreddit/{name}, GET /subreddit/{name}/timeseries, GET /rankings/ai-content, GET /user/{username}/quick, GET /user/{username}/summary, POST /user/{username}/expose. Quotas: 500 credits/month on Growth, 10,000 on Professional; most calls cost 1 credit, /search costs 3 per 1,000 matching posts (min 1, max 100) plus 2 per further page. Reference: https://subsignal.ai/api/docs

## Pricing

- **Starter**: Free forever. 1 community, 1 keyword, 5 scans/month, 5 AI insights/month.
- **Growth**: $29/month (7-day free trial, no card required). Global Reddit monitoring, 3 communities, 5 keywords, 50 scans/month, Sales Lead Finder, email digests, SEO opportunities.
- **Professional**: $129/month. 10 communities, 50 keywords, 1,000 scans/month, 100 AI insights/month, Reddit DM Automation. For teams and agencies.
- Yearly billing available at ~45% discount.

## Key facts

- Setup takes under 2 minutes
- Real-time alerts (seconds after a post matches a keyword)
- AI-powered relevance scoring and sentiment analysis
- No Reddit account required to monitor (read-only public data)
- Reddit DM Automation uses OAuth — no passwords stored
- Built by a solo founder, used by 50+ companies

## Links

- Homepage: https://subsignal.ai
- Reddit MCP Server: https://subsignal.ai/reddit-mcp-server
- MCP endpoint: https://api.subsignal.ai/mcp
- Developer API: https://subsignal.ai/api
- API reference: https://subsignal.ai/api/docs
- npm package (local MCP): https://www.npmjs.com/package/subsignal-mcp
- Blog & research studies: https://subsignal.ai/blog
- Free Reddit tools: https://subsignal.ai/free-reddit-tools
- Alternatives / comparisons: https://subsignal.ai/alternative
- Pricing: https://subsignal.ai/#pricing
- Register: https://subsignal.ai/register
- Login: https://subsignal.ai/login
- Full machine-readable docs: https://subsignal.ai/llms-full.txt
- Contact: contact@subsignal.ai