# Cite42

> Pay-per-call REST API and MCP server for content and search data. Query
> ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews for structured
> answers, citations, brand rankings, competitor comparisons, and sentiment.
> Add SEO keyword data, Google Trends, Reddit, and YouTube signals through the
> same account. AI-model calls start at $0.01 per selected model.
> New accounts receive $1 in test credit; top-ups start at
> $25. Credits never expire, with no subscription or seat fees.

## Docs (REST API)
- [Quickstart](https://www.cite42.dev/docs/api)
- [Search](https://www.cite42.dev/docs/api/search)
- [Rankings](https://www.cite42.dev/docs/api/rankings)
- [Compare](https://www.cite42.dev/docs/api/compare)
- [Citations](https://www.cite42.dev/docs/api/citations)
- [Sentiment](https://www.cite42.dev/docs/api/sentiment)
- [Keywords](https://www.cite42.dev/docs/api/keywords)
- [Trends](https://www.cite42.dev/docs/api/trends)
- [Reddit Trends](https://www.cite42.dev/docs/api/reddit-trends)
- [YouTube Trends](https://www.cite42.dev/docs/api/youtube-trends)
- [Usage](https://www.cite42.dev/docs/api/usage)
- [Content opportunities](https://www.cite42.dev/docs/api/workflows/content-opportunities)
- [Topic demand](https://www.cite42.dev/docs/api/workflows/topic-demand)
- [AI prompt map](https://www.cite42.dev/docs/api/workflows/ai-prompt-map)
- [Competitor content](https://www.cite42.dev/docs/api/workflows/competitor-content)
- [AI citation gaps](https://www.cite42.dev/docs/api/workflows/ai-citation-gaps)
- [Content brief](https://www.cite42.dev/docs/api/workflows/content-brief)
- [Per-model pricing](https://www.cite42.dev/docs/guides/per-model-pricing)
- [Authentication](https://www.cite42.dev/docs/authentication)
- [Credits & billing](https://www.cite42.dev/docs/credits)
- [Errors](https://www.cite42.dev/docs/errors)
- [Rate limits](https://www.cite42.dev/docs/rate-limits)

## Docs (MCP server)
- [Quickstart](https://www.cite42.dev/docs)
- [Overview](https://www.cite42.dev/docs/mcp/tools)
- [Search](https://www.cite42.dev/docs/mcp/tools/search)
- [Rankings](https://www.cite42.dev/docs/mcp/tools/rankings)
- [Compare](https://www.cite42.dev/docs/mcp/tools/compare)
- [Citations](https://www.cite42.dev/docs/mcp/tools/citations)
- [Sentiment](https://www.cite42.dev/docs/mcp/tools/sentiment)
- [Keywords](https://www.cite42.dev/docs/mcp/tools/keywords)
- [Trends](https://www.cite42.dev/docs/mcp/tools/trends)
- [Reddit Trends](https://www.cite42.dev/docs/mcp/tools/reddit-trends)
- [YouTube Trends](https://www.cite42.dev/docs/mcp/tools/youtube-trends)
- [Content opportunities](https://www.cite42.dev/docs/mcp/workflows/content-opportunities)
- [Topic demand](https://www.cite42.dev/docs/mcp/workflows/topic-demand)
- [AI prompt map](https://www.cite42.dev/docs/mcp/workflows/ai-prompt-map)
- [Competitor content](https://www.cite42.dev/docs/mcp/workflows/competitor-content)
- [AI citation gaps](https://www.cite42.dev/docs/mcp/workflows/ai-citation-gaps)
- [Content brief](https://www.cite42.dev/docs/mcp/workflows/content-brief)
- [Tracker tools](https://www.cite42.dev/docs/mcp/trackers)
- [Credits & billing](https://www.cite42.dev/docs/mcp/credits)
- [Rate limits](https://www.cite42.dev/docs/mcp/rate-limits)

## Product / use cases
- [AI search](https://www.cite42.dev/ai-search-api): Ask every model one question.
- [AI visibility tracker](https://www.cite42.dev/trackers/ai-search-visibility): Track mentions and relative position.
- [AI competitor tracker](https://www.cite42.dev/trackers/ai-competitor-tracking): Compare brands and co-mentions.
- [AI citation tracker](https://www.cite42.dev/trackers/ai-citation-tracker): Watch cited sources and URLs.
- [AI sentiment tracker](https://www.cite42.dev/trackers/brand-sentiment-ai): Monitor tone and phrases.
- [SEO Keywords](https://www.cite42.dev/keyword-research-api): Search volume, CPC & keyword ideas.
- [Market Trends](https://www.cite42.dev/market-trends-api): Google demand + Reddit signals.
- [YouTube Trends](https://www.cite42.dev/youtube-trends-api): Video angles and creator demand signals.

## Workflows
- [Content opportunities](https://www.cite42.dev/workflows/content-opportunities): Find topics worth creating.
- [AI prompt map](https://www.cite42.dev/workflows/ai-prompt-map): Discover prompts worth tracking.
- [Topic demand](https://www.cite42.dev/workflows/topic-demand): Measure demand across channels.
- [Competitor content](https://www.cite42.dev/workflows/competitor-content): Find gaps against rivals.
- [AI citation gaps](https://www.cite42.dev/workflows/ai-citation-gaps): Find missing source mentions.
- [Content brief](https://www.cite42.dev/workflows/content-brief): Brief from market data.

## Key pages
- [Product overview](https://www.cite42.dev): Cite42's content and search data API and MCP server.
- [Pricing](https://www.cite42.dev/pricing)
- [Documentation](https://www.cite42.dev/docs)
- [Blog](https://www.cite42.dev/blog)

## Writing
- [One content and search data API for creators and makers](https://www.cite42.dev/blog/content-search-data-mcp-api)