# YouTube Transcript Downloader

> Clean YouTube transcripts for agents: single videos, channels, playlists, plus AI caption cleanup.

- name: com.youtubetranscriptdownload/transcripts
- version: 1.0.0
- connection class: R1 (autonomous)
- trust: 75/100 flags: no-repository
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.youtubetranscriptdownload%2Ftranscripts
- tools: https://api.protogrid.dev/v1/servers/com.youtubetranscriptdownload%2Ftranscripts/tools

**An agent can connect on its own if it already holds `TRANSCRIPTS_TOKEN`.** Remote endpoint behind a static API key or header. The registry never sees the value; the agent fills the placeholder.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "transcripts": {
      "type": "http",
      "url": "https://youtubetranscriptdownload.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ${TRANSCRIPTS_TOKEN}"
      }
    }
  }
}
```

Placeholders to fill: `${TRANSCRIPTS_TOKEN}`.

## Trust

- hygiene: 80
- liveness: 98
- freshness: 65
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-96% ~updated-107d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 943 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 4, about 943 tokens to load them all
- tool set hash: d646984d11e8b4d234dc03fc51b03035
- badge: [![protogrid quality](https://protogrid.dev/badge/com.youtubetranscriptdownload/transcripts.svg)](https://protogrid.dev/servers/com.youtubetranscriptdownload/transcripts)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://youtubetranscriptdownload.com/api/mcp (streamable-http, auth api_key ${TRANSCRIPTS_TOKEN}, reachable true, uptime30d 0.95652175)

## Packages

_none_

## Tools (4)

- `get_channel_transcripts`: Get transcripts for a YouTube channel's most recent videos (newest first) as timestamped markdown, one section per video. Use for research across a creator's recent output; for one known video use get_transcript. Read-only; requires an API key. Charges 1 credit per video that returns a transcript, including repeat calls; videos without captions are skipped free. A 10-video call typically costs up to 10 credits, so start with a small limit. Rate limit: 5 requests per 10 seconds.
- `get_playlist_transcripts`: Get transcripts for the videos in a YouTube playlist (in playlist order) as timestamped markdown, one section per video. Use for working through a course, series, or curated list; for one known video use get_transcript. Read-only; requires an API key. Charges 1 credit per video that returns a transcript, including repeat calls; videos without captions are skipped free. A 10-video call typically costs up to 10 credits, so start with a small limit. Rate limit: 5 requests per 10 seconds.
- `get_transcript`: Get the full transcript of a single YouTube video as timestamped markdown. Read-only: fetches existing captions, modifies nothing. Requires an API key; each successful call charges 1 credit, including repeat calls for the same video, so reuse a transcript already in context instead of re-fetching. Videos without captions return an error and cost nothing. Rate limit: 5 requests per 10 seconds.
- `polish_transcript`: Get a cleaned-up transcript of a YouTube video's auto-generated captions: punctuation and capitalisation restored, filler and false starts removed, paragraphs added, misheard names fixed, faithful to what was said. Use when raw captions are too messy to read or quote; for a plain transcript use get_transcript. Read-only; requires an API key. Each call charges credits by transcript length (about 3 per 1,000 words, minimum 5), including repeat calls, so keep the result in context. Human-uploaded captions (already clean) and transcripts over ~7,000 words return an error without charging. Rate limit: 5 requests per 10 seconds.