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Tools / Reddit / How to

Search inside one subreddit for a topic, from a single query

To search inside one community, put subreddit:name in front of the keyword, such as subreddit:smallbusiness invoicing. social.search passes it to Reddit and returns the matching posts from that subreddit only, with title, date, upvotes and comment count. Good for reading how one audience talks about a problem.

Real run: 5 records $0.002432 per post social.search MCP · REST · CLI

Ask your agent

Search r/smallbusiness for invoicing and tell me which tools people name most.

Connect RouterGrowth once, then ask in plain words. New workspaces start with $1 of credit. Get a key or read the setup guide.

A real run

What does it return?

One call to social.search (social post search), run through RouterGrowth on October 26, 2026. These are the first rows it returned; fields that name a person are masked.

5records returned
39.5 sto answer
$0.0139charged for the run
textpostedupvotesreplies
What software are you using to invoicing?2026-09-0611107
Anyone else planning on adding a “Tariff charge” line on their invoices and receipts?2025-04-081288100
Can I just rant about customers not paying invoices on time?2026-10-11107106

All five posts came from r/smallbusiness: a software question, a pricing debate and a late payment rant, each with 100 comments or more.

Step by step

How do you do it?

  1. Name the subreddit

    Write it as subreddit:name, without the r/, then the keyword: subreddit:smallbusiness invoicing.

  2. Call social.search

    platform reddit and that query. Check that every post's community is the one you asked for.

  3. Rank the threads

    Sort by replies to find the discussions people joined, not only the ones they upvoted.

  4. Open the busiest ones

    social.comments on a post URL returns what people wrote under it.

Price

What does it cost?

List prices on Reddit, read from the catalog when this page was built. The exact figure is quoted before every run, and a monthly plan lowers it.

$0.002432per post
$0.002minimum for a call that returns results
$0when the call finds nothing

In practice

What do you ask it?

You describe the job; the agent picks the calls, shows the price and runs them.

Search r/smallbusiness for invoicing and tell me which tools people name most.

Find the busiest r/smallbusiness threads about late payments and summarize their top comments.

Connect

How do you connect it?

One MCP server for Claude, ChatGPT, Claude Code, Codex and Cursor, or the same call over the CLI and REST with the input above.

MCP server
claude mcp add --transport http routergrowth https://api.routergrowth.com/mcp
CLI
npm install -g routergrowth && routergrowth setup
routergrowth run -c social.search -i '{"platform": "reddit", "query": "subreddit:smallbusiness invoicing", "limit": 5}'
REST
curl -X POST https://api.routergrowth.com/v1/run \
  -H "Authorization: Bearer $ROUTERGROWTH_API_KEY" \
  -d '{"capability": "social.search", "input": {"platform": "reddit", "query": "subreddit:smallbusiness invoicing", "limit": 5}}'

Worth knowing

What should you know first?

The operator rides in the query

There is no separate subreddit field. In this run the operator held: every post was from r/smallbusiness.

Recent posts without a keyword

social.posts with r/name lists a subreddit's latest posts. It does not filter by keyword.

Not sorted by date

Results follow relevance, so a 2025 thread sat next to this month's. Sort on the date yourself.

FAQ

Questions about subreddit search

Do I write r/smallbusiness or smallbusiness?

In the query, use subreddit:smallbusiness. In social.posts, the handle is r/smallbusiness.

Can I search several subreddits at once?

Run one query per subreddit, or drop the operator to search all of Reddit and group by community.

Are private subreddits searched?

No. Only public communities are covered.

How long does it take?

This run took about 40 seconds for five posts. Plan for that when an agent waits on it.

More on Reddit

Related pages

Reading this as an agent? This page as markdown: /tools/reddit/subreddit-search.md

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