Katto

katto-mcp

The AI video clipping MCP server. Turn long videos into scored, captioned, vertical 9:16 short clips from any MCP client (Claude, Cursor, Claude Code, ChatGPT, VS Code, and other conformant clients). Drop in a YouTube link, a podcast, or a Twitch VOD and get publish-ready shorts back through natural conversation.

Powered by Katto, an AI video clipper that turns long-form video (podcasts, interviews, streams, webinars) into short-form clips for TikTok, Reels and YouTube Shorts. Katto is a flat-priced, no-credits alternative to tools like OpusClip: one 25-video quota covers videos up to 90 minutes each, with the API and MCP included on every paid plan (not gated behind an enterprise tier).

What it does

Ask your agent something like "clip the best moments from this podcast and reframe them for TikTok" and Katto will:

• find the strongest 30 to 90 second moments in a long video and score each clip 0 to 100 on Hook, Flow, Value and Trend,
• reframe to vertical 9:16 with face tracking, split-screen for two speakers, and stacked layouts for gaming,
• burn word-by-word animated captions (99 languages) and optionally dub into 8 languages,
• and hand back publish-ready MP4 files plus SRT caption urls.

Typical uses: repurpose a YouTube video into shorts, turn a podcast episode into clips, cut highlights from a Twitch VOD, or convert a long interview into vertical social posts.

Two ways to connect

Hosted (zero-install, recommended)

Point any OAuth-capable MCP client at the hosted endpoint and sign in with your Katto account. The API key never touches your disk, and you can revoke access anytime:

https://mcp.katto.tech/mcp   (Streamable HTTP, OAuth 2.1)

Local (npx)

For Cursor, CI and scripts. Create an API key at katto.tech/dashboard/api-keys, then add the server to your MCP client config:

{
  "mcpServers": {
    "katto": {
      "command": "npx",
      "args": ["-y", "katto-mcp"],
      "env": { "KATTO_API_KEY": "sk_live_..." }
    }
  }
}

The hosted endpoint above also accepts Authorization: Bearer sk_live_... directly for key-based clients.

Tools (15)

Clipping:

• katto_create_clip_job(url, config?) clip a long video (YouTube, Twitch, Vimeo, Rumble, Zoom, Dailymotion). Returns a job id.
• katto_get_job(id) poll until status is completed; clips holds the finished MP4 + caption (SRT) urls.
• katto_get_clips(id) just the finished clips of a job (MP4 + SRT + title + virality score).
• katto_get_transcript(id) the job's timestamped transcript segments.
• katto_list_jobs(limit?, cursor?, status?) your recent jobs, newest first (keyset pagination).
• katto_cancel_job(id) cancel a running job and refund the monthly video slot.

Editing (no quota):

• katto_rerender_clip(id, clip_index, layout_mode?, caption_style?) re-render one clip with a new reframe layout or caption style.
• katto_dub_clip(id, clip_index, languages) re-render a clip dubbed into one or more of 8 languages.
• katto_get_rerender(id, rerender_id) poll a re-render for the new versioned clip url.

Account and reference:

• katto_get_usage() your plan and remaining monthly video quota.
• katto_get_account() the connected account, this key's scopes, and quota.
• katto_get_brand_kit() your saved brand kits (colors, caption font, layout, watermark).
• katto_get_webhook_secret() your webhook signing secret and how to verify signed callbacks.
• katto_list_sources() the video platforms Katto can clip from, with an example url each.
• katto_list_clip_lengths() the valid target clip-length buckets.

Jobs draw from your Katto plan's monthly video quota (25 on Creator, 2 on Free), videos up to 90 minutes. The underlying REST API also supports Idempotency-Key safe retries, read-only scoped keys, and signed HMAC webhooks. See the docs.

Env

var	required	default
KATTO_API_KEY	yes	(none)
KATTO_API_URL	no	https://katto.tech

Full docs: katto.tech/docs/api

MIT