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kryptonite.

Make every cut sound right.

Meme sounds, SFX and reactions for editors and the AI agents they work with.

Start freeBrowse sounds

Works with the agents you already use

  • Claude
  • Claude Code
  • Cursor
  • ChatGPT
  • VS Code
  • Windsurf
  • n8n

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kryptonite×Claude

Sound design, inside your agent.

Paste one URL into Claude, Cursor or any MCP client. Your agent searches, previews and downloads sounds with the licence attached.

Connect MCPGet an API key
mcp.json
{
  "mcpServers": {
    "kryptonite": {
      "url": "https://kryptonite.gg/api/mcp/mcp"
    }
  }
}
  • search_soundsSearch by words, tags, category, licence or length.
  • get_soundMetadata, licence and legal note for one sound.
  • download_soundThe MP3, ready to drop into the timeline.
  • list_categoriesEvery shelf with live counts.
  • suggest_sounds_for_sceneDescribe a scene, get a shortlist.

Kryptonite Studio

Paste your script. The Studio agent reads every beat and builds a cue sheet you can play, swap and download.

Open Studio

Studio · short_final_v3

Script

  1. 0:00Cold open. Phone buzzes on the desk.
  2. 0:03He reads the message. Long pause.
  3. 0:06Smash cut to him sprinting out the door.
  4. 0:09Door slams. Title card drops.
  5. 0:12Punchline: he forgot his shoes.
Score this with meme sounds, keep it under 2s each

Cue sheet

5 cues

  • 0:00
    Rizz Sound Effect
  • 0:03
    Metal Pipe Clang
  • 0:06
    Bruh (sound effect)
  • 0:09
    Taco Bell Bong
  • 0:12
    Discord Notification

724 sounds, one search away. 55 free for commercial use.

  • Every sound labelled with its licence and legal note
  • Uploads re-encoded and scanned before they go live
  • The same catalog for people, MCP and REST

A catalog with range

12 shelves, from internet classics to clean interface pings. Updated as the internet moves.

All categories

Free to start. Generous with an account.

Agents can try Kryptonite without signing up. A free account and an API key unlock real workloads.

Anonymous

No sign-up. Counted per IP.

Searches per day
5
Downloads per day
5
Browsing and previews
Unlimited
Browse sounds

Free account

Recommended

Use an API key in the Authorization header.

Searches per day
1,000
Downloads per day
300
Publish your own sounds
Included
Start free
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Frequently asked questions

What is Kryptonite?

A searchable library of meme sounds, sound effects and reactions. You can preview and download them here, and AI agents can search and fetch the same catalog through an MCP server or a REST API.

How do I connect my AI agent?

Add the Kryptonite MCP server URL to your client (Claude, Cursor, or any MCP-compatible agent). The agent gets tools like search_sounds and download_sound. No install, no local files.

Is it free?

Yes. Without an account an agent gets 5 searches and 5 downloads per day. A free account with an API key raises that to 1,000 searches and 300 downloads per day.

Can I use these sounds in monetised videos?

Only the ones marked CC0 or CC BY. Every sound carries a licence label. Community sounds marked "Rights unverified" belong to their owners and are for personal, non-commercial use.

What format are the files?

MP3. Every file is re-encoded on our side, so you get a clean audio/mpeg file with consistent loudness and no hidden payloads.

Can I upload my own sounds?

Yes. Sign in, accept the upload agreement and publish sounds you own or that are CC0 / CC BY. Files up to 4 MB and 30 seconds are re-encoded and checked before going live.

I own a sound listed here. How do I get it removed?

Use the Report button on the sound page or send a DMCA notice. We hide reported sounds while we review them.

Does Kryptonite work without MCP?

Yes. The REST API at /api/v1 returns the same JSON, including licence and legal notes, so any script or pipeline can use it.

Still curious? Write to us.