# CleanAirData

> Historical PM2.5 and Clean Air Score for US cities; copied records name their source city.

- name: io.github.chenweilie/cleanairdata
- version: 0.1.0
- connection class: R0 (autonomous)
- trust: 79/100 flags: no-repository
- quality: 89/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.chenweilie%2Fcleanairdata
- tools: https://api.protogrid.dev/v1/servers/io.github.chenweilie%2Fcleanairdata/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "cleanairdata": {
      "type": "http",
      "url": "https://cleanairdata.org/api/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 97
- freshness: 100
- provenance: 45
- drivers: +website +reachable +uptime-92% +updated-3d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 89/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 3 of 3 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 660 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 2 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 3, about 660 tokens to load them all
- tool set hash: 9c1eb3092ca471dcda95847a938a8ded
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.chenweilie/cleanairdata.svg)](https://protogrid.dev/servers/io.github.chenweilie/cleanairdata)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://cleanairdata.org/api/mcp (streamable-http, auth none, reachable true, uptime30d 0.9230769)

## Packages

_none_

## Tools (3)

- `compare_cities`: Side-by-side historical records for two US cities with the difference in Clean Air Score and PM2.5. Warnings list any copied record. Each city is either an own_record (scored from its own data) or a copied_record (the full record of the nearest scored city, named in source_city, source_state and source_distance_miles). A copied_record describes the source city, not measurements taken in the named city. Values are historical annual data, not the current AQI.
- `get_city_air_quality`: Historical Clean Air Score, grade, latest annual PM2.5 mean, unhealthy-day share, trend and yearly PM2.5 for one US city. Each city is either an own_record (scored from its own data) or a copied_record (the full record of the nearest scored city, named in source_city, source_state and source_distance_miles). A copied_record describes the source city, not measurements taken in the named city. Values are historical annual data, not the current AQI.
- `rank_cities`: Cities with the highest Clean Air Score (cleanest first), optionally within one state. By default only cities with their own record are ranked, so copied records do not crowd the list. Each city is either an own_record (scored from its own data) or a copied_record (the full record of the nearest scored city, named in source_city, source_state and source_distance_miles). A copied_record describes the source city, not measurements taken in the named city. Values are historical annual data, not the current AQI.