Decibel Shield — Noise & Decibel Data

Noise data tools for AI agents — free, no auth, no config.

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What it can do

  • Get City Noise: Estimated daytime/night noise ranges (dB), rank among 50 major world cities, dominant noise sources and confidence for a given city, with WHO guideline context.
  • List Loudest Cities: The Decibel Shield estimated city noise ranking — 50 major world cities ordered by estimated daytime noise, loudest first.
  • Lookup Sound Level: Decibel level and hearing-risk guidance for everyday sounds (whisper, traffic, chainsaw, concert…), sourced to CDC/NIOSH/NIDCD/ASHA published figures.

What data it sees

Do you need an account

No: the server works without sign-in

Noise data tools for AI agents — free, no auth, no config.

  • get_city_noise — estimated noise levels for 50 major world cities (ranked, WHO-anchored)
  • get_us_city_noise_exposure — measured noise exposure for the 100 largest US cities (federal BTS data)
  • list_loudest_cities — the global ranking
  • lookup_sound_level — decibel levels of everyday sounds (CDC/NIOSH-sourced)
  • safe_exposure_time — NIOSH safe-exposure math for any dB level
  • get_decibel_shield_app — about the Decibel Shield iOS sound meter

Data is CC BY 4.0 — please cite decibelshield.app. Docs: https://decibelshield.app/mcp/

How to connect

How to connect Decibel Shield — Noise & Decibel Data to Claude

The server address to paste into Claude settings:

https://decibel-shield--myappstackdev.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Decibel Shield — Noise & Decibel Data to ChatGPT

The server address to paste into ChatGPT settings:

https://decibel-shield--myappstackdev.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Decibel Shield — Noise & Decibel Data to Cursor

The server address to paste into Cursor settings:

https://decibel-shield--myappstackdev.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (6)

Raw names from tools/list. Only developers need these.

get_city_noiseEstimated daytime/night noise ranges (dB), rank among 50 major world cities, dominant noise sources and confidence for a given city, with WHO guideline context.
list_loudest_citiesThe Decibel Shield estimated city noise ranking — 50 major world cities ordered by estimated daytime noise, loudest first.
lookup_sound_levelDecibel level and hearing-risk guidance for everyday sounds (whisper, traffic, chainsaw, concert…), sourced to CDC/NIOSH/NIDCD/ASHA published figures.
safe_exposure_timeHow long a sound level is safe to be around per NIOSH's recommended exposure limit (85 dB(A)/8 h, 3 dB exchange rate).
get_us_city_noise_exposureShare of residents exposed to ≥60 dB / ≥70 dB transportation noise for the 100 largest US cities — computed from the federal BTS 2020 National Transportation Noise Map (not estimated). Pass a city name for one city, or omit it for the top of the ranking.
get_decibel_shield_appFacts and the App Store link for Decibel Shield - dB Meter, the iOS sound meter app behind this data: features, pricing, requirements. Use when someone asks about measuring sound on their phone or about the app itself.