GET /v1/reddit/subreddit-search

Reddit Subreddit Search API

Search inside one subreddit — same sort/timeframe and post fields as site-wide Search. Flat 2 credits.

2 credits per request

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TL;DR

Search inside one subreddit — same sort/timeframe and post fields as site-wide Search. Flat 2 credits. The Reddit Subreddit Search API (Reddit) is a single authenticated GET request to /v1/reddit/subreddit-search that responds with clean JSON and costs 2 credits. Pass cache=true for a free 24h cache hit; default is always fresh. Start with 100 free credits — no credit card.

What is the Reddit Subreddit Search API?

Pass a subreddit (r/name) and a query to search posts inside that community only. Same sort (relevance/new/top/hot/comments), timeframe, cursor pagination, and result fields as Reddit Search (authorFullname, score/upvoteRatio, subscriberCount, isVideo, flair, …). Flat 2 credits.

What you get

Ranked, structured result list
Title, URL, author, and thumbnail per result when available
Engagement metrics where the platform exposes them
Configurable result limit

Try it

Open in Playground

Fill in the parameters below and copy a ready-to-run request, or open the live Playground to run it against your account (no API key paste).

Parameters

url*stringSubreddit URL, r/name, or bare name, e.g. r/technology. The URL platform must match this endpoint's platform. Do not pass cross-platform URLs, e.g. YouTube to TikTok, Instagram to Facebook, LinkedIn to X/Twitter, or Pinterest to Rumble.q*stringKeywords or search query (min 2 characters).sortoptionalstringrelevance (default) | new | top | hot | comments (alias: comment_count).timeframeoptionalstringFor sort=top or comments: hour | day | week | month | year | all (default all).limitoptionalintegerMax items to return (default 25, max 200). Flat 2 credits per call.cursoroptionalstringPagination cursor. Leave empty for the first page; then pass the nextCursor value returned in the previous response.cacheoptionalbooleanSet true to serve from the 24h response cache (0 credits on hit). Default false — always fetch fresh. Envelope includes cached + cachedAt on hits.

API keyoptionalPaste your key to get a ready-to-run snippet. It stays in your browser.Sign in to run live

curl "https://api.captapi.com/v1/reddit/subreddit-search?url=https%3A%2F%2Fwww.reddit.com%2Fr%2Ftechnology%2F&q=moon" \
  -H "Authorization: Bearer capt_live_..."
# or: -H "x-api-key: capt_live_..."

Edit the parameters and the code updates instantly. Switch languages and hit copy.

Example response

{
  "success": true,
  "data": {
    "subreddit": "space",
    "query": "moon",
    "sort": "new",
    "timeframe": "month",
    "totalReturned": 5,
    "nextCursor": "t3_1vcuw1e",
    "hasMore": true,
    "results": [
      {
        "platform": "reddit",
        "id": "1vdyhxe",
        "name": "t3_1vdyhxe",
        "url": "https://www.reddit.com/r/space/comments/1vdyhxe/defunct_part_of_spacex_falcon_9_rocket_will_slam/",
        "title": "Defunct part of SpaceX Falcon 9 rocket will slam into the moon",
        "text": null,
        "subreddit": "space",
        "author": "DoremusJessup",
        "authorFullname": "t2_612zd",
        "upvotes": 0,
        "score": 0,
        "downs": 0,
        "upvoteRatio": 0.36,
        "comments": 17,
        "subscriberCount": 27939274,
        "totalAwardsReceived": 0,
        "isVideo": false,
        "publishedAt": "2026-08-03T00:37:18.000Z",
        "flair": null,
        "nsfw": false,
        "thumbnail": "https://external-preview.redd.it/H53j3-I3jiW5Qq6JAAR1ywvsYvBmTh5Qlvj2j8mj61E.jpeg?width=140&height=78&auto=webp&s=238c7b5582fe44c2bb3b46390d8e70d9fa3346f3"
      },
      {
        "platform": "reddit",
        "id": "1vdxtae",
        "name": "t3_1vdxtae",
        "url": "https://www.reddit.com/r/space/comments/1vdxtae/why_the_near_and_far_sides_of_the_moon_are_so/",
        "title": "Why the near and far sides of the moon are so different",
        "text": "I have never seen the explanations for this difference as believable past the obvious crust being thinner on the near side allowing eruptions of magma (the dark areas) that didn't happen on the far side.\n\nI asked questions of five different sites before DeepSeek gave me the key to understanding what happened. That key is degree-one mantle convection. \n\nAfter the impact of Theia with the young Earth that resulted in the creation of the Moon, both the Earth and the Moon were molten balls of magma, with the Moon in an eccentric orbit very close to the earth. \n\nTidal friction rapidly caused the Moon to be tidally locked to the Earth so that one side continually faced Earth. However the moon was still in an eccentric orbit, so as the Moon came closer and further from Earth it flexed, causing frictional heating keeping it molten longer. However the Earth, still being enormously hot, slightly heated the surface of the moon facing it by radiative heating. The moon was some twenty times closer to earth than it is now. \n\nThis radiative heating was just enough to keep the close side a little bi …",
        "subreddit": "space",
        "author": "grahamsuth",
        "authorFullname": "t2_17edr0epez",
        "upvotes": 0,
        "score": 0,
        "downs": 0,
        "upvoteRatio": 0.26,
        "comments": 5,
        "subscriberCount": 27939274,
        "totalAwardsReceived": 0,
        "isVideo": false,
        "publishedAt": "2026-08-03T00:06:35.000Z",
        "flair": "Discussion",
        "nsfw": false,
        "thumbnail": null
      }
    ]
  }
}

Billing metadata is returned in response headers: X-Captapi-Credits (credits charged), X-Captapi-Cache (hit or miss), and X-Captapi-Source. Failed requests (4xx/5xx) are never charged. See the full list of error codes in the error reference.

Response structure

A successful call returns success, cached, creditsUsed, and a data object with the following fields:

Top-level fields

subredditSubreddit the post belongs to.
queryThe search query you sent.
sortSort. Example: "new".
timeframeTimeframe. Example: "month".
totalReturnedNumber of items returned in this response.
nextCursorCursor to pass for the next page of results. May be null when the platform does not expose deep pagination (e.g. some Facebook Ad Library searches).
hasMoreWhether more results are available beyond this page. When true, pass nextCursor to fetch the next page.

Results

Each item in results contains:

platformPlatform identifier for this response (matches the endpoint's platform).
idStable platform ID for the item.
nameName of the item or account. On profile endpoints: deprecated alias of displayName (one release).
urlCanonical URL of the item.
titleTitle of the item.
textText content.
subredditSubreddit the post belongs to.
authorAuthor name or handle.
authorFullnameStable Reddit account fullname (t2_…). Prefer this over author for joins.
upvotesUpvote count.
scoreReddit's authoritative post score field (not ups−downs). See scoreHidden when score is temporarily zeroed.
downsDownvote count when Reddit exposes it (often 0 on public JSON).
upvoteRatioPost upvote ratio (0–1) when Reddit exposes it.
commentsComment count.
subscriberCountSubscriber count (channel, subreddit, or similar).
totalAwardsReceivedTotal awards received. Example: 0.
isVideoWhether the item is a video.
publishedAtPublish date (ISO 8601) when the platform exposes an absolute timestamp.
flairPost flair.
nsfwWhether the content is marked NSFW.
thumbnailThumbnail image URL.

Parameters

Name	Type	Required	Description
url	string	Yes	Subreddit URL, r/name, or bare name, e.g. r/technology. The URL platform must match this endpoint's platform. Do not pass cross-platform URLs, e.g. YouTube to TikTok, Instagram to Facebook, LinkedIn to X/Twitter, or Pinterest to Rumble.
q	string	Yes	Keywords or search query (min 2 characters).
sort	string	No	relevance (default) \| new \| top \| hot \| comments (alias: comment_count).
timeframe	string	No	For sort=top or comments: hour \| day \| week \| month \| year \| all (default all).
limit	integer	No	Max items to return (default 25, max 200). Flat 2 credits per call.
cursor	string	No	Pagination cursor. Leave empty for the first page; then pass the nextCursor value returned in the previous response.
cache	boolean	No	Set true to serve from the 24h response cache (0 credits on hit). Default false — always fetch fresh. Envelope includes cached + cachedAt on hits.

Authentication: send your key as Authorization: Bearer capt_live_.... A typical call costs 2 credits. Pass cache=true for a free 24h cache hit; default is always fresh.

Using an AI agent? This endpoint is the MCP tool reddit_subreddit_search via @captapi/mcp. Set it up →

How it works

1. Sign up — get 100 free credits, no card required.
2. Create a key from your dashboard.
3. Send one request to /v1/reddit/subreddit-search and parse the JSON response.

Use cases

Trend Discovery

Find trending content by keyword or hashtag.

Content Sourcing

Build feeds and playlists programmatically.

Monitoring

Track topics, brands, and competitors.

Research

Sample large sets of content for analysis.

Frequently asked questions

What does the Reddit Subreddit Search API do?+

The Reddit Subreddit Search API lets you search and return matching results from a public Reddit query using one GET request to /v1/reddit/subreddit-search. It returns clean JSON — no OAuth or infrastructure setup required.

How many credits does the Reddit Subreddit Search API cost?+

Each successful call costs 2 credits. Pass cache=true to serve from the 24h cache (0 credits on hit); default is always fresh. Hits include cached + cachedAt. Selected profile endpoints also accept cacheMaxAge=1d|3d|7d|14d|30d. Failed or empty results are never charged.

Do I need a Reddit API key or OAuth?+

No. A single Captapi key works across every platform Captapi supports — YouTube, TikTok, Instagram, Facebook, Twitter/X, Reddit, Threads, Bluesky, Pinterest, LinkedIn, Rumble, Spotify, Kwai, and more. We handle proxies, rate limits, retries, and authentication for you.

Why can score be 0 when upvoteRatio is 0.36?+

score is Reddit's own score field — Captapi does not compute ups−downs (public JSON almost always sends downs: 0). New posts often have hide_score: score/upvotes stay 0 while upvoteRatio is still filled. Check scoreHidden; do not treat a zero score as worthless until the hide window ends.

Can I search comments, not just posts?+

Not on this endpoint — results are posts only (kind=t3). For discussion text under a known post, use Post Comments. Site-wide comment search (ScrapeCreators-style comments[]) is a separate surface on the backlog.

Is the Reddit Subreddit Search API suitable for production use?+

Yes. It is a stable REST endpoint with predictable JSON and automatic retries. Pass cache=true to serve from the 24h cache (0 credits on hit); default is always fresh. Hits include cached + cachedAt. Selected profile endpoints also accept cacheMaxAge=1d|3d|7d|14d|30d. Use it for analytics, monitoring, and content automation.

More Reddit APIs

Reddit Subreddit Posts API Reddit Post Details API Reddit Post Comments API Reddit Post Transcript API Reddit Search API Reddit Subreddit Details API

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