99Sounds

agent.md for AI agents

Free downloadable sound effect libraries, sample packs and VST plugins, royalty-free for personal and commercial projects.

Sound effects Library

Is 99Sounds free for commercial use? Yes →

Website License

Price

Free

All sounds and plugins are free to download

Commercial use

Yes

99Sounds License (royalty-free)

Credit the author

Not needed

No credit needed

Agent access

Download only

Rules for your agent

- 99Sounds (Sound effects). Free downloadable sound effect libraries, sample packs and VST plugins, royalty-free for personal and commercial projects. Price: free; commercial use OK; no credit needed; ship inside your app with conditions.
  Connect: download from https://99sounds.org (no API).
  Get files: Manual download (ZIP archive) from the library pages on 99sounds.org, e.g. https://99sounds.org/free-sound-effects/ (wav).
  Not allowed: Don't sell or redistribute the audio files on their own or as a separate attachment, even for free.
  Not allowed: Don't use the sounds to build noise, white noise, sleep sound or similar apps.
  Not allowed: Credit is optional.
  Rule: Do not sell or redistribute the audio files on their own or as a separate attachment, even for free.
  Rule: Do not use the sounds to build noise, white noise, sleep sound or similar apps.
  Rule: Credit is optional; you may mention 99Sounds or the library author in the project description.
  Rule: Bundle the sounds only as part of your own project, such as a game, video or podcast.
  License: https://99sounds.org/license/ (checked 2026-10-14; details: https://agentgid.com/assets/99sounds/)

Paste it into your prompt or AGENTS.md. It is built from the license and API terms below.

License

License	99Sounds License (royalty-free)
Commercial use	Commercial use OK “All audio files and plugins available for download via 99Sounds are royalty-free for personal and commercial projects.” 99sounds.org/license/
Credit	No credit needed “Giving credit to 99Sounds or the individual sound library creator is not obligatory.” 99sounds.org/license/
Inside your app or game	Ship inside your app with conditions “You may modify audio files according to your requirements and use them for projects like game development, YouTube videos, composition, music production, podcasts, sound design, and more.” 99sounds.org/license/
Monetized YouTube	OK in monetized YouTube videos “You may modify audio files according to your requirements and use them for projects like game development, YouTube videos, composition, music production, podcasts, sound design, and more.” 99sounds.org/license/
AI training	Not stated
Bots and bulk downloads	Not stated
Rules	Do not sell or redistribute the audio files on their own or as a separate attachment, even for free. Do not use the sounds to build noise, white noise, sleep sound or similar apps. Credit is optional; you may mention 99Sounds or the library author in the project description. Bundle the sounds only as part of your own project, such as a game, video or podcast.

Connect it to an agent

How an agent gets files	Manual download (ZIP archive) from the library pages on 99sounds.org, e.g. https://99sounds.org/free-sound-effects/ · no sign-in
File formats	wav
Not allowed	Don't sell or redistribute the audio files on their own or as a separate attachment, even for free. Don't use the sounds to build noise, white noise, sleep sound or similar apps. Credit is optional.
MCP server	None found
API	No public API: download by hand

Pricing

Free	All sounds and plugins are free to download
Paid from	—
Usage price	—
Good to know	Added automatically: a well-known source in its category. License read from the official pages.

Sources

Read on Oct 14, 2026: 99sounds.org, 99sounds.org/license/, 99sounds.org/license.

Not legal advice. Check the license page before you ship.

Alternatives to 99Sounds

All sound effects

Source	Price	License	Monetized YouTube	Agent access
Shutterstock Stock images, video, music and sound effects with an API, plus a beta generative image API. agent.md	Free tier	Commercial: unclear	Unclear	API `shutterstock-api`
Epidemic Sound Music and SFX library with a Partner API, safelisting endpoints and an official MCP server. agent.md	Free tier	Commercial: conditions	With conditions	MCP API
Freesound Collaborative database of CC0, CC BY and CC BY-NC sounds with a REST API. agent.md	Free	Commercial: conditions Credit varies	With conditions	API
Pixabay Free photos, illustrations, vectors, videos, music and sound effects; the API covers images and videos only. agent.md	Free	Commercial OK Credit (API) No AI training No bots	With conditions	API
Storyblocks Subscription stock video, audio and images, with an API for platforms under Standard and Enhanced API licenses. agent.md	Free tier	Commercial: conditions No credit No AI training No bots	With conditions	API
Adobe Audition Sound Effects Free downloadable ZIP packs of royalty-free, uncompressed sound effects grouped by type, such as ambience, foley and impacts. agent.md	Free	Commercial: conditions	Unclear	Download
BOOM Library Professional sound effects libraries, nature ambiences and sound design plug-ins, sold as buyout or subscription. agent.md	Free tier	Commercial OK No credit No AI training	Yes	Download
Kenney CC0 game asset packs (2D, 3D, UI, textures, audio), free per pack, plus a paid all-in-one bundle. agent.md	Free tier	Commercial OK No credit	—	Download