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 animated captions (auto-captioned in 99 languages via Whisper large-v3; word-by-word timing in 41 of them, sentence-level in the rest) 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.

Install per client

Claude Code (hosted, OAuth):

claude mcp add --transport http katto https://mcp.katto.tech/mcp

Claude Desktop — Settings → Connectors → Add custom connector → https://mcp.katto.tech/mcp, then sign in. (Or add the npx block above to claude_desktop_config.json.)

Cursor — Settings → MCP → Add → paste the npx JSON block above (uses KATTO_API_KEY).

VS Code (MCP extension) — add the same npx block to your MCP settings, or point it at the hosted URL if your client supports remote OAuth servers.

ChatGPT (Developer mode / connectors) — add a custom connector with URL https://mcp.katto.tech/mcp.

Tools

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 (returns a secret — treat it like a credential).
• 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.
• katto_list_caption_styles() the caption-style presets you can pass as caption_style when creating a job or re-rendering a clip.

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

Security & data

• Hosted auth is OAuth 2.1 — the API key is never written to your disk, and you can revoke a connected client anytime from your Katto account settings.
• Local auth uses a scoped sk_live_ key you create yourself; keys can be read-only, and the npx server only sends it to KATTO_API_URL (default katto.tech) over HTTPS.
• katto_get_webhook_secret returns a signing secret — handle it like any credential; it is only needed to verify inbound webhook signatures.

Also listed on

• npm: katto-mcp
• GitHub: miracleweasel/katto-mcp
• mcp.so · Smithery · Glama
• Official MCP Registry: io.github.miracleweasel/katto-mcp

Public Discovery

Katto – AI video clipping MCP server: turn long videos and podcasts into scored, captioned, reframed 9:16 clips, from any MCP client (Claude, Cursor, ChatGPT). Hosted, OAuth 2.1, no API key on disk.

Intents this server covers: AI video clipping MCP server, MCP server for short-form video, MCP to turn podcasts into clips, video clipping for AI agents (Claude / Cursor / ChatGPT).

Example prompts:

1. "Clip the best moments from this podcast episode and reframe them for TikTok: https://youtube.com/watch?v=…"
2. "Check the status of my last clipping job and give me the download links for the finished clips."
3. "Take clip 2 from that job, dub it into Spanish and re-render it with the Bold caption style."

License

MIT — see LICENSE.