# Trend watching with AI: what is rising on each platform Your AI reads the trending lists and the posts that are taking off on a subject, and tells you what is rising, on which platform, with links. It uses the Viral finder tool and 13 interfaces. A real run recorded 2026-10-18 answered “Which posts about AI agents took off on X this week?” with 1 request for 24 credits (≈ $0.048–$0.08). Failed calls are free. - Page: https://socialtoai.com/use-cases/trend-watching/ - Last updated: 2026-10-21 ## What you get Your AI reads the trending lists and the posts that are taking off on a subject, and tells you what is rising, on which platform, with links. Each platform has its own trending list and its own idea of hot. Checking several of them every day, and telling a real rise from a big account's usual reach, is a chore. ## What it uses The ready-made tool does the whole job in one request: SocialToAI runs the searches, reads the posts and comments, and returns one result with its sources. Each is priced before it runs. - [Viral finder](https://socialtoai.com/tools/viral-finder.md): Posts that did clearly better than their authors usually do. From 24 credits a run. Your AI can also call the interfaces one at a time. These are the ones this job reads; each costs a fixed number of credits per call. | Platform | Interface | What it returns | Price key | Credits | | --- | --- | --- | --- | --- | | X | [Trending](https://socialtoai.com/x-trending-api.md) | What is trending now: title, rank and heat. | `x.trending` | 6 | | Reddit | [Trending](https://socialtoai.com/reddit-trending-api.md) | The posts trending now. | `reddit.trending` | 2 | | Reddit | [Trending · type=trends](https://socialtoai.com/reddit-trending-api.md) | What is trending now: title, rank and heat. | `reddit.trending:trends` | 2 | | Douyin | [Trending](https://socialtoai.com/douyin-trending-api.md) | What is trending now: title, rank and heat. | `douyin.trending` | 2 | | Douyin | [Trending · type=videos](https://socialtoai.com/douyin-trending-api.md) | The videos trending now. | `douyin.trending:videos` | 2 | | Douyin | [Trend-index live hot topics](https://socialtoai.com/douyin-index-topics-api.md) | Get the live topic board or the fastest-rising topic board of Douyin's index tool, about 30 entries each. | `douyin.index_topics` | 2 | | Douyin | [Trend-index keyword trends](https://socialtoai.com/douyin-keyword-history-api.md) | Get the day-by-day search index and composite index of a keyword on Douyin over a date range, from 巨量算数 (the Douyin index), with the daily averages of the period, of the one before and of a year earlier. | `douyin.keyword_history` | 4 | | Douyin | [Trend-index related keywords](https://socialtoai.com/douyin-keyword-related-api.md) | Get the keywords related to a keyword on Douyin in one week, from the platform's own keyword tool. | `douyin.keyword_related` | 2 | | Weibo | [Trending](https://socialtoai.com/weibo-trending-api.md) | What is trending now: title, rank and heat. | `weibo.trending` | 2 | | Xiaohongshu | [Trending](https://socialtoai.com/xiaohongshu-trending-api.md) | What is trending now: title, rank and heat. | `xiaohongshu.trending` | 12 | | Zhihu | [Trending](https://socialtoai.com/zhihu-trending-api.md) | What is trending now: title, rank and heat. | `zhihu.trending` | 2 | | Bilibili | [Trending](https://socialtoai.com/bilibili-trending-api.md) | What is trending now: title, rank and heat. | `bilibili.trending` | 2 | | Bilibili | [Trending · type=videos](https://socialtoai.com/bilibili-trending-api.md) | The videos trending now. | `bilibili.trending:videos` | 2 | ## A worked example A real run on the live service, recorded 2026-10-18: the question, the calls the AI chose and what it answered. The credits are what the run was charged. > Which posts about AI agents took off on X this week? | Platform | Tool | Sent | Requests | Returned | Credits | | --- | --- | --- | --- | --- | --- | | X | [`research viral_finder`](https://socialtoai.com/tools/viral-finder.md) | `query: "AI agents" · window: "7d" · scale: "small"` | 1 | 31 posts | 24 | | **Total** | | | 1 | 31 items | **24** | Recorded 2026-10-18 31 posts found; 7 did at least 3 times the usual. The formats that took off most, each with its share of the 31 posts the analysis could name: 1. **Showcase** (23%, 7 posts): [“transformed an ordinary academic reading list into an interactive research lab right inside the browser”](https://x.com/Bober_smart/status/2110080979742192101) 2. **Story** (10%, 3 posts): [“Grok Bot built me a completely autonomous business which has already generated $1,100”](https://x.com/AlexFinn/status/2110181971280433613) 3. **List** (29%, 9 posts): [“10 GitHub skills + tools that make Hermes instantly more useful.”](https://x.com/BentoBoiNFT/status/2110111219172712922) Used 24 credits · $0.08. Every claim links to its source. The posts it rests on, and the same calls as API requests, are in the [whole recorded run](https://socialtoai.com/docs/guides/find-viral-posts-on-x.md). 24 credits is $0.08 at 300 credits per dollar (purchases from $10) and $0.048 at 500 per dollar (from $200). Failed calls are free, and a search that runs and finds nothing is charged as a call. ## Platform by platform - [How do I ask my AI what is taking off on TikTok and YouTube?](https://socialtoai.com/docs/guides/see-what-is-trending-on-tiktok-and-youtube.md) - [How do I find the posts on a topic that took off on X (Twitter) with AI?](https://socialtoai.com/docs/guides/find-viral-posts-on-x.md) - [How do I find Xiaohongshu (RedNote) notes that are taking off with AI?](https://socialtoai.com/docs/guides/find-viral-notes-on-xiaohongshu.md) - [How do I find Douyin videos that did far better than usual with AI?](https://socialtoai.com/docs/guides/find-viral-videos-on-douyin.md) ## Give this to your AI Connect SocialToAI once: in [Claude](https://socialtoai.com/connect/claude.md), [ChatGPT](https://socialtoai.com/connect/chatgpt.md), [Claude Code](https://socialtoai.com/connect/claude-code.md), [Cursor](https://socialtoai.com/connect/cursor.md) and [Codex](https://socialtoai.com/connect/codex.md) you sign in and press Allow, with no key to paste; other clients are on [the connect page](https://socialtoai.com/mcp.md). Then paste this and replace the parts in angle brackets. Never paste a key into a chat. **Prompt** ``` Use the SocialToAI tools (https://mcp.socialtoai.com/mcp) to tell me what is rising around . Read the trending lists on X, TikTok and YouTube, then use the Viral finder tool on X for posts about it that took off this week. List what is rising, where, and the three posts that show it best, with links and the credits spent. ``` - [The whole recorded run](https://socialtoai.com/docs/guides/find-viral-posts-on-x.md): Which posts about AI agents took off on X this week? - [Viral finder](https://socialtoai.com/tools/viral-finder.md): Posts that did clearly better than their authors usually do - [X (Twitter) API](https://socialtoai.com/platforms/x.md): Every call on X, with its credits. - [Reddit API](https://socialtoai.com/platforms/reddit.md): Every call on Reddit, with its credits.