Reddit Post Comments API
Flat Reddit comment threads with depth/parentId and the parent post in one call.
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 the comments Reddit shows on a post's public page as a flat list with depth and parentId (easy to store, rebuild the tree when you need it): about 20 top-level threads with the replies loaded under them, in Reddit's default order. publishedAt is ISO 8601 UTC; each comment includes score, isSubmitter and its permalink. Reddit loads further comments only for signed-in browsers, so nextCursor is null and hasMore false even when post.comments is higher than totalReturned. authorFullname, edited, stickied, distinguished and controversiality are null — the public page does not carry them. The response includes the parent post. Flat 2 credits per call.
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
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
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,
"limit": 50,
"hasMore": false,
"nextCursor": null,
"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",
"score": 24688,
"upvoteRatio": 0.9509234828496043,
"scoreHidden": null,
"comments": 2892,
"subscriberCount": null,
"isVideo": false,
"publishedAt": "2026-07-29T13:12:05.000Z",
"flair": null,
"nsfw": false,
"thumbnail": null,
"crosspostOf": null
},
"comments": [
{
"id": "p0gnsr6",
"author": "AutoModerator",
"authorFullname": null,
"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\nI am a bot, and this action was performed automatically. Please contact the moderators of this subreddit 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/comment/p0gnsr6/",
"parentId": "t3_1v9vtop",
"depth": 0,
"isSubmitter": false,
"edited": null,
"stickied": null,
"distinguished": null,
"controversiality": null,
"subreddit": "worldnews"
},
{
"id": "p0gp9cm",
"author": "Comprehensive_Fix544",
"authorFullname": null,
"text": "Japan, Germany and Italy will be the first nations to show people what a low fertility rate for such a long time does to a country very soon.",
"upvotes": 242,
"score": 242,
"publishedAt": "2026-07-29T13:19:08.000Z",
"url": "https://www.reddit.com/r/worldnews/comments/1v9vtop/comment/p0gp9cm/",
"parentId": "t3_1v9vtop",
"depth": 0,
"isSubmitter": false,
"edited": null,
"stickied": null,
"distinguished": null,
"controversiality": null,
"subreddit": "worldnews"
}
]
}
}Billing metadata is returned in response headers: X-Captapi-Credits (credits charged), X-Captapi-Cache (hit or miss), and X-Captapi-Request-Id (include it when contacting support). Where the response has a source field, it names the path that served the data: native, extended, cache or asr. 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.limitRequested max items for this call.hasMoretrue only when nextCursor is set. Reddit's public post page has no further page, so this is false today even when post.comments > totalReturned.nextCursorNull today — Reddit loads further comments only for signed-in browsers.
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.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.scoreHiddenScore hidden.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.crosspostOfCrosspost of.
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.
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.
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-commentsand 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 access, rate limits, retries, and authentication for you.
How do I get the rest of the thread?+
You can't through this endpoint today. It returns the comments Reddit renders on the public post page — about 20 top-level threads with their loaded replies. Reddit loads further comments only for signed-in browsers, so nextCursor is null and hasMore false. Compare post.comments with totalReturned to see how much of the thread you have.
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
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