Crabcut

io.github.realcrabcutPublished by GitHub account realcrabcutv2.0.7Updated Oct 24, 2026

Turn YouTube videos into short-form clips from any AI assistant

VerifiedSTDIODesktop onlyProductivity & Workflow Media & Design

Server details

Identifier: io.github.realcrabcut/crabcut
Transport: STDIO
Runtime: Desktop only
Trust: Verified
Published: Sep 16, 2026

Security note

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Overview

AI-generated overview

Crabcut turns a YouTube link into short vertical clips with subtitles, letting an assistant start jobs, poll progress and fetch download-ready clips.

What you can do: Start clip generation from a YouTube URL, optionally limited to a time segment or with a webhook callback
Check project progress and retrieve finished clips sorted by score
List past projects with status and clip counts, and get full details for a single clip
Check the account plan, remaining credits and usage
When to use it: Useful when you want an assistant to repurpose long YouTube videos into short-form vertical clips without leaving the chat, for example to draft social media content or pull the highest-scoring moments from a recording.
Requirements: Runs locally via npx with Node.js, or as a remote Streamable HTTP endpoint. Requires a Crabcut account and an API key supplied in the CRABCUT_API_KEY environment variable (or a Bearer token for the remote endpoint). Network access to the Crabcut API is needed; the API base URL can be overridden with CRABCUT_API_URL.

Before you install

The API key is a live credential (shown as sk_live_...) and is sent to Crabcut's servers; keep it out of shared configs. Clip generation consumes paid credits, and a 402 error means credits ran out. Jobs send the YouTube URL and processing results to a third-party service, and an optional callback_url makes Crabcut POST results to a server you specify.

Installation

In SourceWeft

Open Crabcut in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

@crabcut/mcp-server

Turn YouTube videos into short clips — from Claude, Cursor, or any AI assistant that supports MCP.

Give it a YouTube link. It finds the best moments, reframes for vertical video (9:16), adds subtitles, and returns download-ready clips.

[smithery badge] [CrabCut MCP server]

Quick Start

Get an API key at app.crabcut.ai/developers
Run:

Setup

Claude Desktop / Cursor

Add to your config file — claude_desktop_config.json for Claude, .cursor/mcp.json for Cursor:

json

{  "mcpServers": {    "crabcut": {      "command": "npx",      "args": ["@crabcut/mcp-server"],      "env": {        "CRABCUT_API_KEY": "sk_live_..."      }    }  }}

{  "mcpServers": {    "crabcut": {      "command": "npx",      "args": ["@crabcut/mcp-server"],      "env": {        "CRABCUT_API_KEY": "sk_live_..."      }    }  }}

Cursor Directory

Install in Cursor

Smithery

Remote (Streamable HTTP)

For n8n, custom integrations, or any client that supports remote MCP:

Endpoint: https://mcp.crabcut.ai/mcp
Auth: Authorization: Bearer sk_live_...
Transport: Streamable HTTP (POST)

Tools

Tool	What it does
`generate_clips`	Start clip generation from a YouTube URL. Returns a `project_id` right away.
`get_project_status`	Check progress and get clips when ready. Clips are sorted by score (best first).
`list_projects`	List your projects with status and clip counts.
`get_clip`	Get full details for a single clip.
`check_usage`	See your plan, remaining credits, and usage.

How It Works

Call generate_clips with a YouTube URL
Get back a project_id immediately
Poll get_project_status every 10–15 seconds (or pass a callback_url for webhook)
When done, clips are sorted by score (best first), each with a download_url

Statuses

Project: pending → processing → completed (or completed_no_clips / failed)

Processing steps: queued → DOWNLOADING_VIDEO → EXTRACTING_AUDIO → TRANSCRIBING → DETECTING_HIGHLIGHTS → CUTTING_CLIPS → EXPORTING_CLIPS → done

Clips: pending → exporting → completed (or failed). The download_url is available when clip_status is completed.

API Reference

`generate_clips`

Start clip generation from a YouTube video.

Field	Type	Required	Description
`url`	string	Yes	Full YouTube video URL
`start_time`	number	No	Start time in seconds (to process only a segment)
`end_time`	number	No	End time in seconds (to process only a segment)
`callback_url`	string	No	Webhook URL to receive results when done

json

{  "project_id": "43dbe622-8ac6-4579-9625-0ad7f0f9db0b",  "status": "processing",  "poll_url": "/api/v1/projects/43dbe622-8ac6-4579-9625-0ad7f0f9db0b",  "estimated_minutes": 5,  "message": "Processing started. Poll with get_project_status every 10-15 seconds until status is 'completed'."}

{  "project_id": "43dbe622-8ac6-4579-9625-0ad7f0f9db0b",  "status": "processing",  "poll_url": "/api/v1/projects/43dbe622-8ac6-4579-9625-0ad7f0f9db0b",  "estimated_minutes": 5,  "message": "Processing started. Poll with get_project_status every 10-15 seconds until status is 'completed'."}

`get_project_status`

Check progress and get clips.

json

{  "id": "43dbe622-...",  "name": "Video Title",  "status": "completed",  "step": "done",  "error": null,  "expected_clips": 9,  "duration": 639,  "created_at": "2026-03-15T02:21:46.226Z",  "clips": [    {      "id": "32538b9c-...",      "title": "One Dating Theory Leads to Chaos",      "duration": 41.83,      "score": 90,      "reason": "Sharp universal joke that hooks instantly with strong reactions.",      "clip_status": "completed",      "download_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-....mp4",      "quality": "1080p",      "thumbnail_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-...-thumb.jpg",      "created_at": "2026-03-15T02:29:10.954Z",      "updated_at": "2026-03-15T02:30:43.907Z"    }  ]}

{  "id": "43dbe622-...",  "name": "Video Title",  "status": "completed",  "step": "done",  "error": null,  "expected_clips": 9,  "duration": 639,  "created_at": "2026-03-15T02:21:46.226Z",  "clips": [    {      "id": "32538b9c-...",      "title": "One Dating Theory Leads to Chaos",      "duration": 41.83,      "score": 90,      "reason": "Sharp universal joke that hooks instantly with strong reactions.",      "clip_status": "completed",      "download_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-....mp4",      "quality": "1080p",      "thumbnail_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-...-thumb.jpg",      "created_at": "2026-03-15T02:29:10.954Z",      "updated_at": "2026-03-15T02:30:43.907Z"    }  ]}

Clips are sorted by score (highest first).

`list_projects`

json

{  "projects": [    {      "id": "43dbe622-...",      "name": "Video Title",      "status": "completed",      "step": "done",      "expected_clips": 9,      "clips_count": 8,      "duration": 639,      "created_at": "2026-03-15T02:21:46.226Z"    }  ],  "total": 1,  "limit": 20,  "offset": 0}

{  "projects": [    {      "id": "43dbe622-...",      "name": "Video Title",      "status": "completed",      "step": "done",      "expected_clips": 9,      "clips_count": 8,      "duration": 639,      "created_at": "2026-03-15T02:21:46.226Z"    }  ],  "total": 1,  "limit": 20,  "offset": 0}

`get_clip`

json

{  "id": "32538b9c-...",  "project_id": "43dbe622-...",  "title": "One Dating Theory Leads to Chaos",  "duration": 41.83,  "score": 90,  "reason": "Sharp universal joke that hooks instantly.",  "export_status": "completed",  "export_quality": "1080p",  "is_exported": true,  "video_url": "https://cdn.crabcut.ai/...",  "video_url_720p": "https://cdn.crabcut.ai/...",  "video_url_1080p": "https://cdn.crabcut.ai/...",  "thumbnail_url": "https://cdn.crabcut.ai/...",  "created_at": "2026-03-15T02:29:10.954Z",  "updated_at": "2026-03-15T02:30:43.907Z"}

{  "id": "32538b9c-...",  "project_id": "43dbe622-...",  "title": "One Dating Theory Leads to Chaos",  "duration": 41.83,  "score": 90,  "reason": "Sharp universal joke that hooks instantly.",  "export_status": "completed",  "export_quality": "1080p",  "is_exported": true,  "video_url": "https://cdn.crabcut.ai/...",  "video_url_720p": "https://cdn.crabcut.ai/...",  "video_url_1080p": "https://cdn.crabcut.ai/...",  "thumbnail_url": "https://cdn.crabcut.ai/...",  "created_at": "2026-03-15T02:29:10.954Z",  "updated_at": "2026-03-15T02:30:43.907Z"}

`check_usage`

No input required.

json

{  "plan": "pro",  "credits_remaining": 450,  "credits_total": 500,  "period_start": "2026-03-01T00:00:00.000Z",  "period_end": "2026-04-01T00:00:00.000Z"}

{  "plan": "pro",  "credits_remaining": 450,  "credits_total": 500,  "period_start": "2026-03-01T00:00:00.000Z",  "period_end": "2026-04-01T00:00:00.000Z"}

Errors

HTTP Status	Error	What to do
400	Invalid YouTube URL	Check the URL format
401	Unauthorized	Check your API key
402	Insufficient credits	Buy more credits or use a shorter video
429	Rate limit exceeded	Wait and try again
500	Internal server error	Try again later

Webhooks

Pass a callback_url when calling generate_clips to receive a POST when all clips are ready.

Completed:

json

{  "event": "project.completed",  "project_id": "43dbe622-...",  "status": "completed",  "source_url": "https://www.youtube.com/watch?v=H51iLa1leOU",  "clips": [    {      "id": "32538b9c-...",      "title": "One Dating Theory Leads to Chaos",      "duration": 41.83,      "score": 90,      "download_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-....mp4",      "thumbnail_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-...-thumb.jpg",      "quality": "1080p"    }  ]}

{  "event": "project.completed",  "project_id": "43dbe622-...",  "status": "completed",  "source_url": "https://www.youtube.com/watch?v=H51iLa1leOU",  "clips": [    {      "id": "32538b9c-...",      "title": "One Dating Theory Leads to Chaos",      "duration": 41.83,      "score": 90,      "download_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-....mp4",      "thumbnail_url": "https://cdn.crabcut.ai/exports/premium/.../clip-32538b9c-...-thumb.jpg",      "quality": "1080p"    }  ]}

Failed:

json

{  "event": "project.failed",  "project_id": "43dbe622-...",  "status": "failed",  "error": "YouTube video is unavailable",  "clips": []}

{  "event": "project.failed",  "project_id": "43dbe622-...",  "status": "failed",  "error": "YouTube video is unavailable",  "clips": []}

Clips are sorted by score (highest first). We retry up to 3 times if your server doesn't respond.

Signature verification (optional): Each callback includes an X-Crabcut-Signature header. Compute HMAC-SHA256 of the request body using SHA-256(your_api_key) as the signing key. Compare with the header value (sha256=<hex>).

Using with n8n

Option A — Webhook (recommended):

Create a workflow with a Webhook trigger node. Copy its URL.

Add an HTTP Request node: POST https://api.crabcut.ai/api/v1/clips/generate with Header Auth (Authorization: Bearer sk_live_...) and body:

json

{  "url": "https://www.youtube.com/watch?v=...",  "callback_url": "https://your-n8n.com/webhook/abc123"}

{  "url": "https://www.youtube.com/watch?v=...",  "callback_url": "https://your-n8n.com/webhook/abc123"}

When clips are ready, the Webhook node receives the payload.
Best clip: {{ $json.clips[0].download_url }}

Option B — Polling loop:

POST to generate clips (same as above, without callback_url).
Wait 15 seconds → GET https://api.crabcut.ai/api/v1/projects/{{ $json.project_id }} → IF status is not completed, loop back to Wait.

REST API

For direct HTTP calls without MCP:

Method	Endpoint	Description
`POST`	`/api/v1/clips/generate`	Start clip generation
`GET`	`/api/v1/projects/:id`	Get project status and clips
`GET`	`/api/v1/projects`	List projects
`GET`	`/api/v1/clips/:id`	Get single clip details
`GET`	`/api/v1/account/usage`	Check credits and plan

Base URL: https://api.crabcut.ai — All endpoints require Authorization: Bearer sk_live_...

Environment Variables

License

MIT

Source: README.md at commit 7ed258b

Tools

SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

v2.0.7LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 days25 pts
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Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
License10 pts

Field	Type	Required	Description
`limit`	number	No	Max projects to return. Default 20, max 100.
`status`	string	No	Filter: `pending`, `processing`, `completed`, `completed_no_clips`, `failed`

Variable	Required	Default
`CRABCUT_API_KEY`	Yes	—
`CRABCUT_API_URL`	No	`https://api.crabcut.ai`

Crabcut

Overview

Installation

In SourceWeft

Other MCP clients

README

@crabcut/mcp-server

Quick Start

Setup

Claude Desktop / Cursor

Cursor Directory

Smithery

Remote (Streamable HTTP)

Tools

How It Works

Statuses

API Reference

generate_clips

get_project_status

list_projects

get_clip

check_usage

Errors

Webhooks

Using with n8n

REST API

Environment Variables

Links

License

Tools

Version history

Score

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`generate_clips`

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`list_projects`

`get_clip`

`check_usage`