# SFX Engine review

A web-based AI sound effect generator for game developers, app developers and video creators, with an API and MCP server, from $10/month.

By Noah — last updated & pricing verified October 26, 2026.

> SFX Engine is an AI sound effect generator aimed at game developers, app developers, video editors and podcasters who need custom sounds without searching stock libraries. A prompt describes the material, distance, mood and length of a sound, such as a warm two-note notification chime of 1 second, and the generator returns up to four variations side by side, each billed as one 3-credit sound. Every plan includes royalty-free commercial use under a non-exclusive license that forbids reselling or redistributing the sounds as standalone files. Beyond the generator, a public library of prompt-made sounds is free to browse and download, organized into categories such as UI and buttons, pixel game, game show, whoosh and sci-fi. For automation, the REST API exposes sound-effect generation to build scripts and backends, and the remote MCP server at api.sfxengine.com/mcp gives coding agents six tools, including generate_sound_effect, generate_music and get_credit_balance, signing in through OAuth on first use.

## Facts

- Website: https://sfxengine.com
- Pricing: From $10/mo (verified )
- License: Paid
- Platforms: web
- Best for: Generating a consistent set of UI, notification and game sound effects from text prompts, including straight from a coding agent over MCP
- Standout feature: An MCP server and REST API that let Claude Code, Cursor, ChatGPT or Codex generate sound effects, save the files into a project and wire them into code, at 3 credits per sound.
- Biggest weakness: There is no ongoing free plan: new accounts get 15 credits (about 5 sounds) to try, but downloads and commercial use need a paid plan from $10/month, unused credits do not roll over, and every take of a prompt is billed as a separate sound.
- Categories: [AI audio](https://findalternative.to/categories/ai-audio)

## Pricing snapshot

| Plan | Price | Notes |
| --- | --- | --- |
| Trial | $0/mo | 15 credits (about 5 sound effects) with no card; generate and listen only, since downloads and commercial use need a paid plan. |
| Starter | $10/mo | 500 credits a month (about 166 sound effects), music and voiceover tools, API access, priority email support; $8/month billed yearly. |
| Creator | $25/mo | 4,000 credits a month (about 1,333 sound effects), full API access, priority support; first month half price, $20/month billed yearly. |
| Pro | $90/mo | 15,000 credits a month (about 5,000 sound effects), full API access and priority feature requests; first month half price, $72/month billed yearly. |

## Pros and cons

- Pro: Every paid plan includes royalty-free commercial use in games, apps, videos, ads and podcasts.
- Pro: Sound effects run up to 47 seconds with up to four takes per prompt, at 3 credits each, or about 166 a month on Starter.
- Pro: The MCP server signs in with OAuth and works with Claude Code, Claude, Cursor, VS Code, ChatGPT, Codex, Windsurf and Gemini CLI.
- Pro: The same credits also cover background music, DJ transitions, stem splitting and voiceover.
- Pro: The public sound library can be browsed and downloaded for free.
- Con: No ongoing free plan; the 15-credit trial allows generating and listening but not downloading.
- Con: Credits reset to the plan amount at each renewal, with no rollover.
- Con: Four takes of one prompt cost 12 credits, so Starter's 500 credits cover about 41 four-take prompts.
- Con: The license is non-exclusive and revocable and bans reselling or redistributing sounds as standalone files, which rules out selling sound packs.

## AI summary

- SFX Engine plans cost $10/month (500 credits), $25/month (4,000 credits) and $90/month (15,000 credits); yearly billing takes 20% off.
- An SFX Engine sound effect costs 3 credits and can run up to 47 seconds, with up to four takes per prompt.
- SFX Engine's MCP server at api.sfxengine.com/mcp offers 6 tools and signs in with OAuth instead of an API key.
- New SFX Engine accounts get 15 free credits, about 5 sound effects, without a card; downloads require a paid plan.
- Every SFX Engine paid plan includes royalty-free commercial use.
- Best for: Generating a consistent set of UI, notification and game sound effects from text prompts, including from a coding agent over MCP.
- Pricing: No ongoing free plan (15 trial credits); Starter is $10/month, Creator $25/month and Pro $90/month, or $8, $20 and $72 a month billed yearly.
- Top alternatives: ElevenLabs, Notify Sound, Stable Audio, Fish Audio, Zedge
- Limitation: Downloads and commercial use require a paid plan from $10/month.
- Limitation: Credits do not roll over between billing periods.
- Limitation: Sounds cannot be resold or redistributed as standalone files.

## Alternatives

4 vetted alternatives to SFX Engine: https://findalternative.to/sfx-engine — top picks: ElevenLabs, Notify Sound, Zedge

## Comparisons

- https://findalternative.to/compare/elevenlabs-vs-sfx-engine

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