Use when subtitles or the spoken text of a YouTube video is needed: pasted video links or IDs, requests to translate a video, read along, follow foreign-language content, or extract what was said. Also use for language learning or accessibility. Fetches timestamped subtitles from any YouTube video. Not for uploading subtitles or account management.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
설치 방법 보기설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.
Fetch YouTube video subtitles via TranscriptAPI.com.
If $TRANSCRIPT_API_KEY is not set, read references/auth-setup.md and follow the instructions there to get and store the key.
Every request needs two headers:
Bearer $TRANSCRIPT_API_KEYHermesAgent/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 https://transcriptapi.com/api/v2/youtube/transcript?video_url=VIDEO_URL&format=text&include_timestamp=false&send_metadata=true
Authorization: Bearer $TRANSCRIPT_API_KEY
User-Agent: YourAgent/1.0
| Param | Values | Use case |
|---|---|---|
video_url | YouTube URL or video ID | Required |
format | json, text | json for sync'd subs with timing |
include_timestamp | true, false | false for clean text for reading/translation |
send_metadata | true, false | Include title, channel, description |
For language learning — clean text without timestamps:
GET https://transcriptapi.com/api/v2/youtube/transcript?video_url=VIDEO_ID&format=text&include_timestamp=false
Authorization: Bearer $TRANSCRIPT_API_KEY
User-Agent: YourAgent/1.0
For translation — structured segments:
GET https://transcriptapi.com/api/v2/youtube/transcript?video_url=VIDEO_ID&format=json&include_timestamp=true
Authorization: Bearer $TRANSCRIPT_API_KEY
User-Agent: YourAgent/1.0
Response (format=json):
{
"video_id": "dQw4w9WgXcQ",
"language": "en",
"transcript": [
{ "text": "We're no strangers to love", "start": 18.0, "duration": 3.5 }
]
}
Response (format=text, include_timestamp=false):
{
"video_id": "dQw4w9WgXcQ",
"language": "en",
"transcript": "We're no strangers to love\nYou know the rules and so do I..."
}
format=json to get timing for each line (great for sync'd reading).include_timestamp=false for clean text suitable for translation apps.| 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 subtitles | No subtitles available |
| 408 | Timeout | Retry once after 2s |
1 credit per request. Free tier: 100 credits, 300 req/min.
Every request in this file as a ready-to-run one-liner: references/curl-examples.md
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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.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Use when the spoken content of a YouTube video is needed — even if not explicitly requested: pasted video links or IDs, requests to summarize, quote, transcribe, translate, fact-check, or extract anything from a video. Also use for research or learning when a video is the source. Not for uploads or account management.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Use when YouTube is or could be relevant — even if not mentioned: pasted video/channel/playlist links, video IDs, @handles, creator lookups, video summaries, quotes, translations, topic research, tutorials, talks, lectures, expert discussions, product reviews, how-to guides, new product announcements, or anything where video content is fresher or richer than text search. Covers transcripts, video/channel search, channel browsing, playlists, and within-channel search. Not for uploads, account management, or written-source-only research.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Use when video content needs to be extracted as text: pasted YouTube links or IDs, requests to transcribe, summarize, quote, translate, convert video to text, or extract information from video content. Also use when a user shares a video URL without explanation and wants to know what it says. Not for uploads or account management.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Use when YouTube data is needed without Google API quotas or OAuth setup: transcripts, video metadata, channel info, search results, playlists. Triggers on pasted YouTube links, creator names, @handles, topic research, video summaries, channel browsing, or any request where YouTube content would help — even if not mentioned explicitly. Not for uploads, account management, or written-source-only research.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Use when a YouTube channel is the focus: pasted @handles or channel URLs, requests to browse a creator's uploads, see what a channel has posted recently, search within a channel, or resolve a handle to a channel ID. Also use when the user names a creator and wants to explore their content or monitor their uploads. Not for creating channels or account management.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.