# io.github.cyanheads/cdc-health-mcp-server (remote · cdc.caseyjhand.com)

Search and query CDC public health data — mortality, vaccinations, surveillance, behavioral risk.

- Trust score: 71/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `cdc.caseyjhand.com`: 71/100 (this document), [markdown](https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cdc.md), [page](https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cdc)
- npm · `@cyanheads/cdc-health-mcp-server`: 35/100, [markdown](https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cyanheads-cdc-health-mcp-server.md), [page](https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cyanheads-cdc-health-mcp-server)

## Channel facts

- Endpoint: `https://cdc.caseyjhand.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.8.0`

## 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 2026-08-03.

- **Endpoint Security**: 66/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 79/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1542 tokens (~220/item across 7 items; 4 tools + 3 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http cyanheads-cdc-health-mcp-server https://cdc.caseyjhand.com/mcp
```

### Codex

```toml
[mcp_servers.cyanheads-cdc-health-mcp-server]
url = "https://cdc.caseyjhand.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "cyanheads-cdc-health-mcp-server": {
      "type": "remote",
      "url": "https://cdc.caseyjhand.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add cyanheads-cdc-health-mcp-server --url https://cdc.caseyjhand.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  cyanheads-cdc-health-mcp-server:
    url: "https://cdc.caseyjhand.com/mcp"
```

### Other

```json
{
  "mcpServers": {
    "cyanheads-cdc-health-mcp-server": {
      "type": "http",
      "url": "https://cdc.caseyjhand.com/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.

### 2026-08-02 (score 71, +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.

### 2026-07-31 (score 70, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 69, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 68, +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.

### 2026-07-27 (score 67, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 66)

First indexed and scored.

## MCP tools (4)

### `cdc_discover_datasets` (~312 tokens)

Cdc Discover Datasets

Search the CDC dataset catalog by keyword, category, or tag. Returns dataset IDs, names, truncated descriptions, column counts, and update timestamps. Use cdc_get_dataset_schema for the full column list of a chosen dataset.

Input parameters:

- `category` (string): Filter by domain category (e.g., "NNDSS", "Vaccinations", "Behavioral Risk Factors").
- `domain` (string): CDC Socrata portal to search. "data.cdc.gov" (default) is the main CDC catalog; "chronicdata.cdc.gov" hosts chronic-disease and small-area datasets (PLACES, the Heart Disease & Stroke Atlas, Environm…
- `limit` (integer): Results to return (default 10, max 100).
- `offset` (integer): Pagination offset for browsing beyond first page (max 9999).
- `order` (string): Result ordering. "dataset_id" (default) sorts deterministically by each dataset's unique catalog ID — required for stable offset pagination, since consecutive pages form a gap-free, duplicate-free tr…
- `query` (string): Full-text search across dataset names and descriptions (e.g., "diabetes mortality", "lead exposure children").
- `tags` (array): Filter by domain tags (e.g., ["covid19", "surveillance"]).

Output parameters:

- `appliedFilters` (object): Filters applied to this query; absent fields indicate no filter on that dimension.
- `datasets` (array): Matching datasets.
- `notice` (string): Guidance when no datasets matched — echoes the applied filters and suggests how to broaden the search.
- `totalCount` (number): Total matching datasets in the catalog (for pagination).

### `cdc_get_dataset_schema` (~130 tokens)

Cdc Get Dataset Schema

Fetch the full column schema for a CDC dataset — names, data types, descriptions, row count, and last-updated timestamp. Get dataset IDs from cdc_discover_datasets.

Input parameters:

- `datasetId` (string, required): Four-by-four dataset identifier (e.g., "bi63-dtpu"). Obtain from cdc_discover_datasets.
- `domain` (string): CDC Socrata portal hosting the dataset. Use the same portal you found the dataset on via cdc_discover_datasets: "data.cdc.gov" (default) or "chronicdata.cdc.gov".

Output parameters:

- `columns` (array): Dataset columns with types and descriptions.
- `description` (string): Dataset description when provided.
- `name` (string): Dataset display name from the catalog (e.g., "Provisional COVID-19 Deaths by Sex and Age").
- `rowCount` (number): Total number of rows when reported by upstream; omitted when unknown.
- `updatedAt` (string): Last data update timestamp when provided.

### `cdc_query_dataset` (~403 tokens)

Cdc Query Dataset

Execute a SoQL query against any CDC dataset. Supports filtering, aggregation, sorting, full-text search, and field selection. Use cdc_discover_datasets to find dataset IDs and cdc_get_dataset_schema to inspect columns before querying.

Input parameters:

- `datasetId` (string, required): Four-by-four dataset identifier (e.g., "bi63-dtpu"). Obtain from cdc_discover_datasets.
- `domain` (string): CDC Socrata portal hosting the dataset. Must match the portal the dataset lives on: "data.cdc.gov" (default) or "chronicdata.cdc.gov" (PLACES and other chronic-disease/small-area datasets).
- `group` (string): SoQL GROUP BY clause. Requires aggregate functions in select.
- `having` (string): SoQL HAVING clause. Filters aggregated results.
- `limit` (integer): Max rows to return (default 100, max 5000).
- `offset` (integer): Row offset for pagination (max 1,000,000).
- `order` (string): SoQL ORDER BY clause. Field name with optional ASC/DESC: "total_deaths DESC".
- `search` (string): Full-text search across all text columns. For precise filtering use the where parameter instead.
- `select` (string): SoQL SELECT clause — column names, aliases, or aggregates: "state, sum(deaths) as total_deaths". Omit for all columns. To enumerate distinct values of a column, set select to "{column}, count(*) as c…
- `where` (string): SoQL WHERE clause. Strings must be single-quoted: "state='California' AND year=2020". If a column name matches a SoQL keyword (group, select, where, order, limit, offset, having, search), wrap it in…

Output parameters:

- `cap` (number): The requested limit that bounded this response.
- `effectiveQuery` (string): Assembled SoQL query string sent to the Socrata API.
- `notice` (string): Guidance when no rows matched or results were truncated — how to verify filters, paginate, or broaden the query.
- `rowCount` (number): Number of rows returned in this response.
- `rows` (array): Result rows with requested fields. Most values are strings (including numbers/dates); geo columns return GeoJSON objects.
- `shown` (number): Number of rows returned in this response.
- `truncated` (boolean): True when the result row count hit the requested limit and may be incomplete.

### `cdc_query_wonder` (~348 tokens)

Cdc Query Wonder

Query CDC WONDER for national US mortality statistics — deaths, population, and crude/age-adjusted death rates — from the Underlying Cause of Death database (D76, 1999–2020). Break results out by year, age group, sex, and/or race, and filter by ICD-10 cause of death, sex, age group, or year range. WONDER is a separate CDC system from the Socrata datasets the other cdc_* tools query. Data is national only — sub-national (state/county) breakdowns are not available through the API (CDC vital-statistics policy). Cause of death is a filter, not a grouping. CDC suppresses any cell with fewer than 10 deaths (returned as null). The API is rate-limited to one request every ~15 seconds, so requests may be briefly spaced.

Input parameters:

- `age_groups` (array): Restrict to specific ten-year age groups — e.g. ["25-34","35-44"]. "1" is the under-1-year group. Omit for all ages.
- `cause_icd10`: Filter to a specific ICD-10 underlying cause of death. Omit for all causes.
- `group_by` (array): Dimensions to break results out by (1–4), in output-column order — e.g. ["year"], ["year","sex"], ["age_group","race"]. Results are always national. Cause of death is a filter (cause_icd10), not a gr…
- `sex` (string): Filter by sex.
- `year_range` (object): Inclusive year range within 1999–2020. Omit for all years.

Output parameters:

- `caveats` (array): CDC-provided caveats and footnotes: data revisions, population-estimate sources, suppression and rate-reliability rules.
- `database` (string): WONDER database queried (D76 — Underlying Cause of Death, 1999–2020).
- `effectiveQuery` (string): Human-readable summary of the grouping and filters sent to WONDER.
- `notice` (string): Guidance when no rows matched, or a note that CDC suppressed some cells.
- `rowCount` (number): Number of rows returned.
- `rows` (array): Result rows. Each carries the requested group-by dimensions plus deaths, population, crude_rate, and — unless grouped by age_group — age_adjusted_rate (per 100,000). Suppressed measure cells (< 10 de…
- `suppressedCount` (number): Number of measure cells CDC suppressed (< 10 deaths), returned as null.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cdc#diagnostics

## Score history

- 2026-08-03: 71
- 2026-08-02: 71
- 2026-08-01: 70
- 2026-07-31: 70
- 2026-07-30: 69
- 2026-07-29: 68
- 2026-07-28: 68
- 2026-07-27: 67
- 2026-07-26: 66

## Links

- Remote endpoint: https://cdc.caseyjhand.com/mcp
- Repository: https://github.com/cyanheads/cdc-health-mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cdc/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cdc/changelog.json
- HTML version of this page: https://verifymcp.io/servers/cyanheads-cdc-health-mcp-server/cdc