Agent Skills › ZeroPointRepo/youtube-skills › captions

captions

GitHub

通过TranscriptAPI提取YouTube视频的字幕和转录文本，支持时间戳、格式转换及元数据获取，适用于无障碍访问、内容审查及语言学习等场景。

clawhub/captions/SKILL.md ZeroPointRepo/youtube-skills

Trigger Scenarios

用户粘贴YouTube链接或ID请求阅读/翻译视频内容需要视频字幕进行无障碍访问或语言学习

Install

npx skills add ZeroPointRepo/youtube-skills --skill captions -g -y

More Options

Non-standard path

npx skills add https://github.com/ZeroPointRepo/youtube-skills/tree/main/clawhub/captions -g -y

Use without installing

npx skills use ZeroPointRepo/youtube-skills@captions

指定 Agent (Claude Code)

npx skills add ZeroPointRepo/youtube-skills --skill captions -a claude-code -g -y

安装 repo 全部 skill

npx skills add ZeroPointRepo/youtube-skills --all -g -y

预览 repo 内 skill

npx skills add ZeroPointRepo/youtube-skills --list

SKILL.md

Frontmatter

{
    "name": "captions",
    "version": "1.5.0",
    "metadata": {
        "hermes": {
            "tags": [
                "youtube",
                "captions",
                "subtitles",
                "transcripts",
                "video",
                "accessibility",
                "translation"
            ],
            "category": "media"
        },
        "openclaw": {
            "emoji": "💬",
            "homepage": "https:\/\/transcriptapi.com",
            "requires": {
                "env": [
                    "TRANSCRIPT_API_KEY"
                ]
            },
            "primaryEnv": "TRANSCRIPT_API_KEY"
        }
    },
    "description": "Use when captions, subtitles, or the spoken text of a YouTube video is needed — even if not explicitly requested: pasted video links or IDs, requests to read, quote, or translate a video, accessibility needs, deaf\/HoH use cases, content review, or language learning. Fetches timestamped caption data from any YouTube video. Not for uploading subtitles or account management.",
    "compatibility": "Requires internet access to reach transcriptapi.com. No additional runtimes or dependencies needed.",
    "user-invocable": true,
    "required_environment_variables": [
        {
            "help": "Free account at https:\/\/transcriptapi.com — 100 credits, no card required. Or let the agent create one for you.",
            "name": "TRANSCRIPT_API_KEY",
            "prompt": "Your TranscriptAPI key (starts with sk_)",
            "required_for": "all API requests"
        }
    ]
}

Captions

Extract closed captions from YouTube videos via TranscriptAPI.com.

Setup

If $TRANSCRIPT_API_KEY is not set, read references/auth-setup.md and follow the instructions there to get and store the key.

Required Headers

Every request needs two headers:

Authorization: Bearer $TRANSCRIPT_API_KEY
User-Agent: your agent's name and version if known (e.g. HermesAgent/0.11.0, ClaudeCode/1.0). Version is optional — agent name alone is fine. Do not omit this header or send a bare default — Cloudflare will return a 403 (error code 1010) and block the request.

GET /api/v2/youtube/transcript

curl -s "https://transcriptapi.com/api/v2/youtube/transcript\
?video_url=VIDEO_URL&format=json&include_timestamp=true&send_metadata=true" \
  -H "Authorization: Bearer $TRANSCRIPT_API_KEY" \
  -H "User-Agent: YourAgent/1.0"

Param	Required	Default	Values
`video_url`	yes	—	YouTube URL or video ID
`format`	no	`json`	`json` (structured), `text` (plain)
`include_timestamp`	no	`true`	`true`, `false`
`send_metadata`	no	`false`	`true`, `false`

Response (format=json — best for accessibility/timing):

{
  "video_id": "dQw4w9WgXcQ",
  "language": "en",
  "transcript": [
    { "text": "We're no strangers to love", "start": 18.0, "duration": 3.5 },
    { "text": "You know the rules and so do I", "start": 21.5, "duration": 2.8 }
  ],
  "metadata": { "title": "...", "author_name": "...", "thumbnail_url": "..." }
}

start: seconds from video start
duration: how long caption is displayed

Response (format=text — readable):

{
  "video_id": "dQw4w9WgXcQ",
  "language": "en",
  "transcript": "[00:00:18] We're no strangers to love\n[00:00:21] You know the rules..."
}

Tips

Use format=json for sync'd captions (accessibility tools, timing analysis).
Use format=text with include_timestamp=false for clean reading.
Auto-generated captions are available for most videos; manual CC is higher quality.

Errors

Code	Meaning	Action
401	Bad API key	Check key
402	No credits	transcriptapi.com/billing
403/1010	Cloudflare block	Add or fix User-Agent header
404	No captions	Video doesn't have CC enabled
408	Timeout	Retry once after 2s