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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 times
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.
Source documentation, not instructions for this website. Review permissions before running any commands.
Extract closed captions from YouTube videos 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.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 startduration: how long caption is displayedResponse (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..."
}
format=json for sync'd captions (accessibility tools, timing analysis).format=text with include_timestamp=false for clean reading.| 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 |
1 credit per request. Free tier: 100 credits, 300 req/min.
name: captions
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."
version: "1.5.0"
user-invocable: true
compatibility: Requires internet access to reach transcriptapi.com. No additional runtimes or dependencies needed.
required_environment_variables:
- name: TRANSCRIPT_API_KEY
prompt: Your TranscriptAPI key (starts with sk_)
help: Free account at https://transcriptapi.com — 100 credits, no card required. Or let the agent create one for you.
required_for: all API requests
metadata: {"openclaw":{"emoji":"💬","requires":{"env":["TRANSCRIPT_API_KEY"]},"primaryEnv":"TRANSCRIPT_API_KEY","homepage":"https://transcriptapi.com"},"hermes":{"tags":["youtube","captions","subtitles","transcripts","video","accessibility","translation"],"category":"media"}}---
name: captions
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."
version: "1.5.0"
user-invocable: true
compatibility: Requires internet access to reach transcriptapi.com. No additional runtimes or dependencies needed.
required_environment_variables:
- name: TRANSCRIPT_API_KEY
prompt: Your TranscriptAPI key (starts with sk_)
help: Free account at https://transcriptapi.com — 100 credits, no card required. Or let the agent create one for you.
required_for: all API requests
metadata: {"openclaw":{"emoji":"💬","requires":{"env":["TRANSCRIPT_API_KEY"]},"primaryEnv":"TRANSCRIPT_API_KEY","homepage":"https://transcriptapi.com"},"hermes":{"tags":["youtube","captions","subtitles","transcripts","video","accessibility","translation"],"category":"media"}}
---
# Captions
Extract closed captions from YouTube videos 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=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):
```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": "...", "author_name": "...", "thumbnail_url": "..." }
}
```
- `start`: seconds from video start
- `duration`: how long caption is displayed
**Response** (`format=text` — readable):
```json
{
"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 |
1 credit per request. Free tier: 100 credits, 300 req/min.
Source needs review
The tracked source changed or could not be synchronized. Review the current source before installing.
Review before install: Avoid automatic install
License: MIT
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
Version reported in registry metadata; check source releases before relying on it.
Quality
76/100
Strong
Trust
67/100
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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}Listing source
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Audit
81/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.