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Reddit keyword alerts and monitoring after the RSS shutdown: an F5Bot alternative for your AI agent (2026)

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Every morning, search Reddit and r/subreddits for new posts that mention keywords. Drop the ones that are not really about them, and send me only the posts I have not seen yet, with the subreddit, the title, the comment count and the link.

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Overview

Reddit keyword alerts tell you when a new post mentions your product, your competitor, or a problem you solve. Founders, marketers and researchers set them up with an RSS feed of a Reddit search, read in a feed reader or Zapier, or with a hosted tool like F5Bot.

Reddit stops its RSS feeds on November 13, 2026, and closes its public Data API in March 2027. With Reduck, your AI agent runs the same searches in your own Chrome on a schedule, and sends you only the new posts that are about your keywords.

Why it's hard

The two ways to watch Reddit without opening it are closing. RSS feeds of a search stop on November 13, 2026. The public Data API needs an approved app and closes in March 2027. Unauthenticated .json requests answer 403, and Reddit blocks connections from datacenter addresses, where cloud scrapers and most agents run.

When a search does work, it is noisy: Reddit matches words loosely, so a keyword alert also sends you every post that uses one of its words in another sense.

How Reduck does it

Reduck's Reddit scripts run in your own Chrome, through the Reduck extension, where you are signed in to Reddit. Each time it checks, your agent searches all of Reddit for each keyword, sorted by newest, and searches the subreddits you care about with your whole list of keywords in one pass. For a subreddit you want to read in full, it gets every thread posted since the last check.

It keeps the posts created since the last check, reads each one, drops those that are not about your keyword, and sends you the rest with their subreddit, title, score, comment count and link. If you ask, it opens a thread with get_thread and summarizes the comments.

What Reddit announced, with the dates: What Reddit September 2026 API and RSS shutdown implies and how to keep using Reddit with your agent.

What your agent does

  1. Search all of Reddit for each keyword, newest first
  2. Search the subreddits you pick with your whole list of keywords in one pass
  3. Keep only the posts created since the last check
  4. Read each one and drop the posts that are not about your keyword
  5. Send you the matches with the subreddit, the title, the comment count and the link

Reddit monitoring: RSS, F5Bot or Reduck

RSS feed of a Reddit search F5Bot Reduck
After November 13, 2026 Stops Not documented Unchanged: it reads the pages you read
Runs In your feed reader On F5Bot's servers In your own Chrome, signed in to Reddit
Setup A feed URL per search An account and a keyword list Stay signed in to Reddit in Chrome
Off-topic matches Every match is sent Filtering flags; AI filtering on the Gold plan Your agent reads each post and drops them
Watches One search per feed Reddit posts and comments, Hacker News, Lobsters Reddit posts; all comments of a thread you follow
Where alerts go Your feed reader Email; Slack and Discord on the Gold plan The chat with your agent, or a connector your client has

Who it's for

  • Founders who want to know when someone asks for a product like theirs
  • Marketers who track mentions of their brand and their competitors on Reddit
  • Anyone whose Reddit RSS feeds, Zapier flows or IFTTT applets stop working on November 13, 2026

FAQ

Reddit stops its RSS feeds on November 13, 2026, so a feed reader or a Zapier flow that reads a search feed stops too. With Reduck, your AI agent opens Reddit search in your own Chrome, where you are signed in, on the schedule you set. It reads the new posts for each keyword and sends you the ones that match. It does not use RSS or the API.
It does the same first job: tell you when a new Reddit post mentions your keyword. The difference is that your own AI agent does the reading: it opens each match, drops the ones that only share a word with your keyword, and tells you why a post matters, in the chat where you already work. F5Bot is a hosted service: it watches posts and comments on Reddit, Hacker News and Lobsters, sends email alerts on its free plan, and adds AI filtering and Slack or Discord alerts on its Gold plan ($49.99 a month, per f5bot.com in October 2026). These Reduck scripts watch Reddit posts only. How F5Bot reads Reddit after the end of RSS and the public API is not documented on its site.
New posts: their title and text. Reddit's search does not list new comments by keyword. For a thread you already follow, get_thread reads every comment, so your agent can tell you what is new in it since the last check.
No. There is no app to register and no key to paste. You stay signed in to Reddit in Chrome, and the Reduck extension runs each search there. Reddit blocks connections from datacenter addresses, which is why the searches run in your own browser.
As often as your agent runs it. Ask for a check in the chat whenever you want one, or set a scheduled task in your AI client if it offers them. Each check reads the posts created since the last one, by their date, so you get each post once.
Reddit's search matches words loosely: a search for your keyword also returns posts that use one of its words in another sense. A plain keyword alert sends you all of them. Your agent reads each result and keeps only the posts that are about your keyword.
In the chat with your agent. If your AI client also has an email or Slack connector, you can ask your agent to send the alerts there. Each alert gives the subreddit, the title, the score, the comment count and the link to the post.
Reddit's rules forbid unauthorized scraping and bulk collection, whatever tool does it. Your agent runs a few searches at your pace, in your own session: the searches you could type yourself. It only reads; it posts nothing.

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