CaptapiCaptapi
YouTube · Guide

How to get YouTube comment replies

TL;DR
To get YouTube comment replies, sign up for a free Captapi key, then send one GET request to /v1/youtube/comment-replies with your input. You get clean JSON back in seconds for 2 credits per call — no OAuth, scraping or platform SDKs. Replies under a top-level comment — parentReplyCount + cursor. Nested reply ids return 404.
Get your free API keyAPI reference

How to get YouTube comment replies (step by step)

  1. 1

    Get a free API key

    Create a free Captapi account (100 credits, no card) and generate an API key from the dashboard.

  2. 2

    Call the YouTube Comment Replies API

    Send an authenticated GET request to /v1/youtube/comment-replies with your input. No OAuth, no scraping setup.

  3. 3

    Read the JSON response

    Parse the clean JSON response. Pass cache=true for a free 24h cache hit; default is always fresh.

Code example

curl "https://api.captapi.com/v1/youtube/comment-replies?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DdQw4w9WgXcQ&commentId=Ugzge340dBgB75hWBm54AaABAg" \
  -H "Authorization: Bearer capt_live_..."
# or: -H "x-api-key: capt_live_..."

What the response looks like

{
  "success": true,
  "data": {
    "url": "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
    "videoId": "dQw4w9WgXcQ",
    "commentId": "Ugzge340dBgB75hWBm54AaABAg",
    "totalReturned": 2,
    "replies": [
      {
        "id": "Ugzge340dBgB75hWBm54AaABAg.AHE8_QAWJx9AHE9eIiztxR",
        "author": "@linganguliguliwatcha",
        "authorChannelId": "UCjFRISlX-LPxiqViJAE3h6Q",
        "authorAvatarUrl": "https://yt3.ggpht.com/AbGqKNjK9k5tyOqdV7cdXx-GgnGuuGQ5wj8RN42U5YCDvYHT0vaOKXGFahR36iaDPseGN08DjQ=s88-c-k-c0x00ffffff-no-rj",
        "authorIsVerified": false,
        "authorIsChannelOwner": false,
        "text": "YOUTUBE AND ONE LIKE WOOHAAAAH",
        "likeCount": 7200,
        "replyCount": 5,
        "hasCreatorHeart": false,
        "publishedTimeText": "1 year ago",
        "replyToId": "Ugzge340dBgB75hWBm54AaABAg",
        "publishedTimeApprox": "2025-08-03T00:00:00.000Z",
        "publishedTimeIsApproximate": true
      },
      {
        "id": "Ugzge340dBgB75hWBm54AaABAg.AHE8_QAWJx9AHEAB_-JmDA",
        "author": "@_bugrabilgin",
        "authorChannelId": "UCg9tPtxMOieUEyhSv63uJ4g",
        "authorAvatarUrl": "https://yt3.ggpht.com/LvMpN24GYYr8w43sGoMeYZYejDPJz_skehI6jm_XGGhfM5YeRa9OOsaplj60LnFNehE79ZxImg=s88-c-k-c0x00ffffff-no-rj",
        "authorIsVerified": false,
        "authorIsChannelOwner": false,
        "text": "HEY YOUTUBE",
        "likeCount": 3000,
        "replyCount": 2,
        "hasCreatorHeart": false,
        "publishedTimeText": "1 year ago",
        "replyToId": "Ugzge340dBgB75hWBm54AaABAg",
        "publishedTimeApprox": "2025-08-03T00:00:00.000Z",
        "publishedTimeIsApproximate": true
      }
    ]
  }
}

Billing metadata (credits charged, cache hit/miss) is returned in the X-Captapi-Credits and X-Captapi-Cache response headers.

Request parameters

NameTypeRequiredDescription
urlstring YesPublic YouTube video URL, e.g. https://youtube.com/watch?v=ID. Not a TikTok/Instagram/Facebook 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.
commentIdstring YesID of the parent (top-level) comment to fetch replies for — from the comments endpoint. Legacy alias: comment_id.
limitintegerNoMax items to return (default 50, max 500). Flat 2 credits per call.
cursorstringNoPagination cursor. Leave empty for the first page; then pass the nextCursor value returned in the previous response.
cachebooleanNoSet true to serve from the 24h response cache (0 credits on hit). Default false — always fetch fresh.

Frequently asked questions

What does the YouTube Comment Replies API do?

The YouTube Comment Replies API lets you pull comments with author, text, likes, and replies from a public YouTube comment replies using one GET request to /v1/youtube/comment-replies. It returns clean JSON — no OAuth or infrastructure setup required.

How many credits does the YouTube Comment Replies 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 YouTube 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 YouTube Comment Replies 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.

Ready to get YouTube comment replies?

Start free with 100 credits — no credit card required.

Get your free API key