transcript
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.
What this skill does
# Transcript
Fetch video transcripts via [TranscriptAPI.com](https://transcriptapi.com).
## Setup
If `$TRANSCRIPT_API_KEY` is not set, read [references/auth-setup.md](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
```bash
curl -s "https://transcriptapi.com/api/v2/youtube/transcript\
?video_url=VIDEO_URL&format=text&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 11-char video ID |
| `format` | no | `json` | `json`, `text` |
| `include_timestamp` | no | `true` | `true`, `false` |
| `send_metadata` | no | `false` | `true`, `false` |
Accepts: full URLs (`youtube.com/watch?v=ID`), short URLs (`youtu.be/ID`), shorts (`youtube.com/shorts/ID`), or bare video IDs.
**Default:** Always use `format=text&include_timestamp=true&send_metadata=true` unless user specifies otherwise.
**Response** (`format=json`):
```json
{
"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": "Rick Astley - Never Gonna Give You Up",
"author_name": "Rick Astley",
"author_url": "https://www.youtube.com/@RickAstley",
"thumbnail_url": "https://i.ytimg.com/vi/dQw4w9WgXcQ/maxresdefault.jpg"
}
}
```
**Response** (`format=text`):
```json
{
"video_id": "dQw4w9WgXcQ",
"language": "en",
"transcript": "[00:00:18] We're no strangers to love\n[00:00:21] You know the rules...",
"metadata": {...}
}
```
## Errors
| Code | Meaning | Action |
| -------- | ---------------- | ---------------------------------------------- |
| 401 | Bad API key | Check key or re-setup |
| 402 | No credits | Top up at transcriptapi.com/billing |
| 403/1010 | Cloudflare block | Add or fix User-Agent header |
| 404 | No transcript | Video may not have captions enabled |
| 408 | Timeout | Retry once after 2s |
| 429 | Rate limited | Wait and retry |
## Tips
- For long videos, summarize key points first, offer full transcript on request.
- Use `format=json` when you need precise timestamps for quoting specific moments.
- Use `include_timestamp=false` for clean text suitable for translation or analysis.
- 1 credit per successful request. Errors don't cost credits.
- Free tier: 100 credits, 300 req/min.
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