# CleanAirData (remote · cleanairdata.org)

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

- Trust score: 35/100 (low)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `cleanairdata.org`: 35/100 (this document), [markdown](https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp.md), [page](https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp)

## Channel facts

- Endpoint: `https://cleanairdata.org/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 0/100
  - Schema blocked by authentication: the endpoint requires auth we don't have to read it.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools.
- **Tool Safety**: 0/100
  - Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.
- **Capabilities**: 0/100
  - Capabilities blocked by authentication: the endpoint requires auth we don't have to read them.

**Unverified: 5 categories.** Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the CleanAirData MCP server?

CleanAirData is a hosted endpoint at https://cleanairdata.org/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http chenweilie-cleanairdata 'https://cleanairdata.org/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "chenweilie-cleanairdata": {
      "url": "https://cleanairdata.org/api/mcp"
    }
  }
}
```

### VS Code

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

### Codex

```toml
[mcp_servers.chenweilie-cleanairdata]
url = "https://cleanairdata.org/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "chenweilie-cleanairdata": {
      "type": "remote",
      "url": "https://cleanairdata.org/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add chenweilie-cleanairdata --url 'https://cleanairdata.org/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  chenweilie-cleanairdata:
    url: "https://cleanairdata.org/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "chenweilie-cleanairdata": {
      "Transport": "http",
      "Url": "https://cleanairdata.org/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add chenweilie-cleanairdata -t streamable-http -u 'https://cleanairdata.org/api/mcp'
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-29 (score 35, −40)

- [security regression] Endpoint reachability: reachable → behind authorisation
- [security regression] Stability: 0.37 → unverified
- [security regression] Tool safety: pass → unverified
- [security regression] Authorization: partial → unverified
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] Schema quality: Schema blocked by authentication: the endpoint requires auth we don't have to read it.

### 2026-10-28 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-22 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-18 (score 70, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-17 (score 70, +45)

- [security improvement] Authorization: unverified → partial
- [security improvement] Injection markers: unverified → pass
- [security improvement] Transport: fail → pass
- [security] First check of Judged manipulation: pass
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Schema quality: fail
- [functional] First check of Tool coverage: 78
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: good

## MCP tools (3)

### `get_city_air_quality` (~141 tokens)

Get city air quality record

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.

Input parameters:

- `city` (string, required): City name, for example "Phoenix".
- `state` (string, required): Two-letter state code, for example "AZ".

### `compare_cities` (~148 tokens)

Compare two 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.

Input parameters:

- `city_a` (string, required)
- `city_b` (string, required)
- `state_a` (string, required): Two-letter state code.
- `state_b` (string, required): Two-letter state code.

### `rank_cities` (~164 tokens)

Rank cities by Clean Air Score

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.

Input parameters:

- `limit` (integer): Number of cities, default 10, maximum 25.
- `own_records_only` (boolean): Default true. Set false to include copied records.
- `state` (string): Optional two-letter state code.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp#diagnostics

## Score history

- 2026-11-05: 35
- 2026-11-04: 35
- 2026-11-03: 35
- 2026-11-02: 35
- 2026-11-01: 35
- 2026-10-31: 35
- 2026-10-30: 35
- 2026-10-29: 35
- 2026-10-28: 75
- 2026-10-27: 74
- 2026-10-26: 74
- 2026-10-25: 73
- 2026-10-24: 73
- 2026-10-23: 72
- 2026-10-22: 72
- 2026-10-21: 71
- 2026-10-20: 71
- 2026-10-19: 71
- 2026-10-18: 70
- 2026-10-17: 70
- 2026-10-16: 25

## Common questions

### What is the CleanAirData MCP server?

CleanAirData is an MCP server listed in the public MCP registry as io.github.chenweilie/cleanairdata. Historical PM2.5 and Clean Air Score for US cities; copied records name their source city. This page covers its hosted endpoint (https://cleanairdata.org/api/mcp).

### Is the CleanAirData MCP server safe to use?

CleanAirData scores 35 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the CleanAirData MCP server expose?

CleanAirData exposes 3 tools: get_city_air_quality, compare_cities, rank_cities. Their descriptions and schemas cost roughly 453 tokens of context every time the server is loaded.

### Does the CleanAirData MCP server require authentication?

No. We connected to CleanAirData without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the CleanAirData MCP server still maintained?

CleanAirData is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What did VerifyMCP test on the CleanAirData MCP server?

VerifyMCP ran 5 checks on CleanAirData, covering TLS certificate, HTTPS, HSTS header, DNSSEC and 1 more. 6 items could not be completed, a gap on our side rather than a finding about CleanAirData: Authorization, Schema quality, Stability, Tool coverage and 2 more. 5 categories score 0 for that reason, because we only credit what we can confirm. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- Remote endpoint: https://cleanairdata.org/api/mcp
- Website: https://cleanairdata.org/developers/api
- Changelog RSS feed: https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/chenweilie-cleanairdata/api-mcp