GET /v1/reddit/post-transcript

Reddit Post Transcript API

Reddit discussion as text — title/body/comments segments, timingSource none. Flat 2 credits.

2 credits per request

Try in Playground Get your API key — free Read the docs

TL;DR

Reddit discussion as text — title/body/comments segments, timingSource none. Flat 2 credits. The Reddit Post Transcript API (Reddit) is a single authenticated GET request to /v1/reddit/post-transcript 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 Transcript API?

Paste a Reddit post URL and get the discussion as structured text: title, body, and comments as transcriptSegments (speaker labeled). timingSource is always "none" today — discussion text has no caption track. When timingSource is "none", segment start/duration/timestamp are omitted (returned only when timingSource is "captions"). Each segment has index, wordCount, charStart/charEnd into transcript. estimatedReadSeconds is a top-level 200 wpm estimate only — never inside duration. Flat 2 credits.

What you get

Full transcript text with start/end timestamps when available
Auto-detected language and segment count
AI audio transcription fallback when no captions exist
Clean JSON ready for search, subtitles, or AI pipelines

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 200). Flat 2 credits per call.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/post-transcript?url=https%3A%2F%2Fwww.reddit.com%2Fr%2Fspace%2Fcomments%2F1umfd43%2Fradiation_exposure_may_become_the_biggest%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": {
    "platform": "reddit",
    "url": "https://www.reddit.com/r/space/comments/1umfd43/radiation_exposure_may_become_the_biggest/",
    "post": {
      "platform": "reddit",
      "id": "1umfd43",
      "url": "https://www.reddit.com/r/space/comments/1umfd43/radiation_exposure_may_become_the_biggest/",
      "title": "Radiation exposure may become the biggest challenge for future Moon and Mars missions",
      "text": "[removed]",
      "subreddit": "space",
      "author": "Low-Mathematician137",
      "upvotes": 0,
      "comments": 65,
      "publishedAt": "2026-07-03T14:04:13+00:00",
      "flair": "Discussion",
      "nsfw": false,
      "thumbnail": null
    },
    "transcript": "Title: Radiation exposure may become the biggest challenge for future Moon and Mars missions\n\n[removed]\n\nEffingWasps: Insert that very recent but weirdly broadly applicable “this has been talked about extensively you’re just 21” meme\n\nb407driver: Become? It has always been the greatest (unsolved) challenge.\n\nWaarm: The current biggest challenge is funding.",
    "transcriptSegments": [
      {
        "text": "Title: Radiation exposure may become the biggest challenge for future Moon and Mars missions",
        "speaker": "post",
        "index": 0,
        "wordCount": 14,
        "charStart": 0,
        "charEnd": 92
      },
      {
        "text": "[removed]",
        "speaker": "Low-Mathematician137",
        "index": 1,
        "wordCount": 1,
        "charStart": 94,
        "charEnd": 103
      },
      {
        "text": "EffingWasps: Insert that very recent but weirdly broadly applicable “this has been talked about extensively you’re just 21” meme",
        "speaker": "EffingWasps",
        "index": 2,
        "wordCount": 19,
        "charStart": 105,
        "charEnd": 233
      },
      {
        "text": "b407driver: Become? It has always been the greatest (unsolved) challenge.",
        "speaker": "b407driver",
        "index": 3,
        "wordCount": 10,
        "charStart": 235,
        "charEnd": 308
      },
      {
        "text": "Waarm: The current biggest challenge is funding.",
        "speaker": "Waarm",
        "index": 4,
        "wordCount": 7,
        "charStart": 310,
        "charEnd": 358
      }
    ],
    "wordCount": 51,
    "segments": 5,
    "commentsIncluded": 5,
    "timingSource": "none",
    "estimatedReadSeconds": 15
  }
}

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

platformPlatform identifier for this response (matches the endpoint's platform).
urlCanonical URL of the item.
transcriptComplete text transcript (file-upload endpoints). Timed caption/ASR endpoints use text instead.
wordCountWord count (emoji-only tokens count as 0; URLs count as 1).
segmentsTimed caption/ASR: array of {text,startMs,endMs}. File-upload video-transcript: segment count. Sponsor endpoints: sponsor segment list.
commentsIncludedComments included. Example: 5.
timingSourceAlways "none" today. "captions" is reserved — do not branch on it; nothing emits it yet.
estimatedReadSecondsWhole-transcript reading-time estimate at 200 wpm. Not per-segment duration.

Post

The post object contains:

platformPlatform identifier for this response (matches the endpoint's platform).
idStable platform ID for the item.
urlCanonical URL of the item.
titleTitle of the item.
textText content.
subredditSubreddit the post belongs to.
authorAuthor name or handle.
upvotesUpvote count.
commentsComment count.
publishedAtPublish date (ISO 8601) when the platform exposes an absolute timestamp.
flairPost flair.
nsfwWhether the content is marked NSFW.
thumbnailThumbnail image URL.

Transcript segments

Each item in transcriptSegments contains:

textText content.
speakerSpeaker label for the segment.
index0-based segment order.
wordCountWord count (emoji-only tokens count as 0; URLs count as 1).
charStartStart offset into transcript (transcript.slice(charStart, charEnd) === text).
charEndEnd offset into transcript (exclusive).

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 200). Flat 2 credits per call.
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_post_transcript 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-transcript and parse the JSON response.

Use cases

Accessibility

Provide captions and transcripts for hearing-impaired users.

Content Analysis

Analyze spoken content for keywords, topics, and sentiment.

Search & Discovery

Make video content searchable by text.

Content Creation

Extract quotes and key phrases from videos.

Language Learning

Provide text alongside audio for language learners.

Research

Analyze large volumes of video content efficiently.

SEO

Extract text content for search engine optimization.

Frequently asked questions

What does the Reddit Post Transcript API do?+

The Reddit Post Transcript API lets you extract the full, timestamped transcript from a public Reddit post using one GET request to /v1/reddit/post-transcript. It returns clean JSON — no OAuth or infrastructure setup required.

How many credits does the Reddit Post Transcript 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.

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

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