GET /v1/reddit/post-comments

Reddit Post Comments API

Flat Reddit comment threads with depth/parentId, cursor pagination, and the parent post in one call.

2 credits per request

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TL;DR

Flat Reddit comment threads with depth/parentId, cursor pagination, and the parent post in one call. The Reddit Post Comments API (Reddit) is a single authenticated GET request to /v1/reddit/post-comments 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 Post Comments API?

Fetch comments on a Reddit post as a flat list with depth and parentId (easy to store, rebuild the tree when you need it). publishedAt is ISO 8601 UTC. Each comment includes score and authorFullname (t2_…) when Reddit exposes them. Page with cursor / nextCursor — hasMore is true only when nextCursor is set (pass it back; do not raise limit to invent a page). downs and totalAwardsReceived are omitted — Reddit does not publish downvotes and retired awards in 2023. The response includes the parent post. Flat 2 credits per call. Max 500 comments per request.

What you get

Comment or review text, author name, and handle
Like counts and timestamps when available
Cursor pagination via nextCursor + hasMore
Use the matching Comment Replies endpoint when you need nested replies

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*stringReddit post URL. 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.limitoptionalintegerMax items to return (default 50, max 500). 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.

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/post-comments?url=https%3A%2F%2Fwww.reddit.com%2Fr%2Fworldnews%2Fcomments%2F1v9vtop%2Fjapans_population_falls_below_120_million_for%2F" \
  -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": {
    "totalReturned": 2,
    "comments": [
      {
        "id": "p0gnsr6",
        "author": "AutoModerator",
        "authorFullname": "t2_6l4z3",
        "text": "Users often report submissions from this site for sensationalized articles. Readers have a responsibility to be skeptical, check sources, and comment on any flaws.\n\nYou can help improve this thread by linking to media that verifies or questions this article's claims. Your link could help readers better understand this issue.\n\n*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/worldnews) if you have any questions or concerns.*",
        "upvotes": 1,
        "score": 1,
        "publishedAt": "2026-07-29T13:12:05.000Z",
        "url": "https://www.reddit.com/r/worldnews/comments/1v9vtop/japans_population_falls_below_120_million_for/p0gnsr6/",
        "parentId": "t3_1v9vtop",
        "depth": 0,
        "isSubmitter": false,
        "edited": false,
        "stickied": true,
        "distinguished": "moderator",
        "controversiality": 0,
        "subreddit": "worldnews"
      },
      {
        "id": "p0gpy2l",
        "author": "Donnicton",
        "authorFullname": "t2_8iha3",
        "text": "Sorry, best we can do about it is symbolically send you home early one day this month to go make a kid or whatever.",
        "upvotes": 10014,
        "score": 10014,
        "publishedAt": "2026-07-29T13:22:22.000Z",
        "url": "https://www.reddit.com/r/worldnews/comments/1v9vtop/japans_population_falls_below_120_million_for/p0gpy2l/",
        "parentId": "t3_1v9vtop",
        "depth": 0,
        "isSubmitter": false,
        "edited": false,
        "stickied": false,
        "distinguished": null,
        "controversiality": 0,
        "subreddit": "worldnews"
      }
    ],
    "post": {
      "platform": "reddit",
      "id": "1v9vtop",
      "name": "t3_1v9vtop",
      "url": "https://www.reddit.com/r/worldnews/comments/1v9vtop/japans_population_falls_below_120_million_for/",
      "title": "Japan's population falls below 120 million for first time in 42 years as birth crisis deepens",
      "text": null,
      "subreddit": "worldnews",
      "author": "rdh2dmd",
      "authorFullname": "t2_2i0a3navkp",
      "upvotes": 24395,
      "score": 24395,
      "upvoteRatio": 0.95,
      "comments": 2932,
      "subscriberCount": 47503811,
      "isVideo": false,
      "publishedAt": "2026-07-29T13:12:05+00:00",
      "flair": null,
      "nsfw": false,
      "thumbnail": "https://external-preview.redd.it/z1-dgwVNE_wakjIdcx8RRK7U5pnn5xhdXdXqCAQGY6U.jpeg?width=140&height=78&auto=webp&s=51c84bd9c71d792505f54b10d4023457a63d5495"
    }
  }
}

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 and a data object with the following fields:

Top-level fields

totalReturnedNumber of items returned in this response.

Comments

Each item in comments contains:

idId of this comments item.
authorAuthor name or handle.
authorFullnameStable Reddit account fullname (t2_…). Prefer this over author for joins.
textText content.
upvotesUpvote count.
scoreVote score. On Reddit this is the platform's authoritative score field (not ups−downs — public JSON almost always zeros downs). Posts no longer ship an upvotes twin; comments still expose both.
publishedAtPublish date (ISO 8601) when the platform exposes an absolute timestamp.
urlCanonical URL of the item.
parentIdID of the parent comment for replies.
depthDepth. Example: 0.
isSubmitterIs submitter. Example: false.
editedWhether the comment was edited.
stickiedWhether the comment is stickied.
distinguishedmoderator/admin distinction when present.
controversialityReddit controversiality flag (0 or 1).
subredditSubreddit the post belongs to.

Post

The post object contains:

platformPlatform identifier for this response (matches the endpoint's platform).
idId of this post item.
nameName of this post item.
urlCanonical URL of the item.
titleTitle of this post 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.
scoreVote score. On Reddit this is the platform's authoritative score field (not ups−downs — public JSON almost always zeros downs). Posts no longer ship an upvotes twin; comments still expose both.
upvoteRatioPost upvote ratio (0–1) when Reddit exposes it.
commentsComment count.
subscriberCountSubscriber count (channel, subreddit, or similar).
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	Reddit post URL. 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.
limit	integer	No	Max items to return (default 50, max 500). 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.

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_post_comments 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/post-comments and parse the JSON response.

Use cases

Sentiment Analysis

Understand how audiences react to content.

Community Insights

Surface FAQs, requests, and recurring themes.

Moderation

Detect spam, abuse, or policy violations at scale.

Market Research

Mine genuine opinions and product feedback.

Frequently asked questions

What does the Reddit Post Comments API do?+

The Reddit Post Comments API lets you pull comments with author, text, likes, and replies from a public Reddit post using one GET request to /v1/reddit/post-comments. It returns clean JSON — no OAuth or infrastructure setup required.

How many credits does the Reddit Post Comments 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. 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.

How do I get the rest of the thread?+

Pass nextCursor back as cursor. hasMore is true only when nextCursor is set — there is no silent “more exists but you cannot page” state. Raising limit still returns a larger first page (max 500).

Is the Reddit Post Comments 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. 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 Transcript API Reddit Search API Reddit Subreddit Details API Reddit Subreddit Post Search API

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