Is the UK Data: US CDC health counts MCP server safe?

No scan can promise that. What its definitions show: 4 tools, 4 of which can change, send or delete something, and 0 findings from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.

Can the UK Data: US CDC health counts MCP server delete data?

No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.

Can the UK Data: US CDC health counts MCP server do things that cannot be undone?

No tool is classed as irreversible: none of them sends, pays, publishes or merges, going by their definitions.

Does the UK Data: US CDC health counts MCP server need sign-in or OAuth?

Its remote endpoint listed its tools to an anonymous client, without sign-in.

Does the UK Data: US CDC health counts MCP server send data to outside services?

None of its tools sends, posts or publishes, or takes a recipient, channel or URL.

Has the UK Data: US CDC health counts MCP server changed its tools?

Not since anlyon.dev started tracking it. Last scanned Nov 7, 2026.

UK Data: US CDC health counts MCP server

uk.co.reliness/public-health-countsreliness.co.ukstreamable-httpv1.5.0Scanned 8 days ago

US CDC counts: weekly notifiable diseases and flu, COVID-19 and RSV hospital admissions

4 tools: 4 change things.

Reads private data · 0
Reads text others write · 4
Can send data out · 0
No findings

Tools listed without sign-in. Remote posture

With Anlyon

4 tools here change things. Govern them.

Anlyon lists the tools and adopts none.
Each tool you adopt gets approvals and receipts.
Your agent never holds the key.

Govern this server →

A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.

What the UK Data: US CDC health counts MCP server can do

The UK Data: US CDC health counts MCP server is published by reliness.co.uk, a domain the MCP Registry verified. It has 4 tools. It can create or change data (4 tools: flu_hospital_admissions_weekly, covid_hospital_admissions_weekly, rsv_hospital_admissions_weekly and drug_overdose_deaths_12mo), but cannot delete data. None of its tools only reads.

4 tools bring in text other people can write (flu_hospital_admissions_weekly, covid_hospital_admissions_weekly, rsv_hospital_admissions_weekly and 1 more).

None of the fixed checks matched anything in its tool definitions. That is not a safety guarantee.

Its remote endpoint lists its tools without sign-in.

Last scanned Nov 7, 2026, version 1.5.0.

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

4 tools

Changes things 4Creates or changes something that can be changed back.Claude Code: ask

covid_hospital_admissions_weeklyIs COVID-19 rising in US hospitals?Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Is COVID-19 rising in US hospitals? Returns weekly new hospital admissions for laboratory-confirmed COVID-19 (adult and paediatric), patients currently in hospital and ICU, the week-on-week change and the season-to-date total, nationally or for one state, from CDC's NHSN Weekly Hospital Respiratory Data. An official reported hospital figure, not a model. It does not count community cases, tests or deaths. (cost: 1 credit)
Annotations the server declares
- title: covid hospital admissions weekly
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
drug_overdose_deaths_12moHow many people are dying of drug overdoses in the US?Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
How many people are dying of drug overdoses in the US? Returns CDC's provisional 12-month-ending count of drug overdose deaths, reported and predicted (adjusted for delayed reporting), for the US or one state, month by month with the change on a year earlier, from NCHS Vital Statistics Rapid Release. For journalists and policy staff tracking the fentanyl-era trend. Provisional and lagged by several months; no breakdown by drug here. (cost: 1 credit)
Annotations the server declares
- title: drug overdose deaths 12mo
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
flu_hospital_admissions_weeklyHow bad is flu season in US hospitals?Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
How bad is flu season in US hospitals? Returns weekly new hospital admissions for laboratory-confirmed influenza (adult and paediatric), patients currently in hospital and ICU, and the season-to-date total, nationally or for one state, from CDC's NHSN Weekly Hospital Respiratory Data. For planners, parents and reporters tracking the season. Hospital data only: it does not count flu cases in the community or deaths. (cost: 1 credit)
Annotations the server declares
- title: flu hospital admissions weekly
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
rsv_hospital_admissions_weeklyIs RSV going around?Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Is RSV going around? Returns weekly new hospital admissions for laboratory-confirmed RSV, split into children and adults, plus patients in hospital and ICU and the season-to-date total, nationally or for one state, from CDC's NHSN Weekly Hospital Respiratory Data. Useful for parents of infants, paediatric services and reporters each autumn and winter. Hospital data only; it does not count community infections. (cost: 1 credit)
Annotations the server declares
- title: rsv hospital admissions weekly
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write4: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; covid_hospital_admissions_weekly
drug_overdose_deaths_12mo
flu_hospital_admissions_weekly
rsv_hospital_admissions_weekly
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Nov 14, 2026, 12:23 UTC, unchanged since Nov 7, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 4
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: not observed
RFC 9728 protected resource metadata: not observed
Authorization servers: not observed
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 4 tools that change things (4 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://ukdata.reliness.co.uk/mcp/public-health-counts: tools/list returned 4 tools to an anonymous client, including flu_hospital_admissions_weekly (write), covid_hospital_admissions_weekly (write), rsv_hospital_admissions_weekly (write), drug_overdose_deaths_12mo (write)
What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.5.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http public-health-counts https://ukdata.reliness.co.uk/mcp/public-health-counts

claude mcp add --transport http public-health-counts https://ukdata.reliness.co.uk/mcp/public-health-counts

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__public-health-counts__flu_hospital_admissions_weekly",
      "mcp__public-health-counts__covid_hospital_admissions_weekly",
      "mcp__public-health-counts__rsv_hospital_admissions_weekly",
      "mcp__public-health-counts__drug_overdose_deaths_12mo"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as public-health-counts. Review it before you use it.

Capability tags behind 4 rules

mcp__public-health-counts__flu_hospital_admissions_weekly untrusted-input
mcp__public-health-counts__covid_hospital_admissions_weekly untrusted-input
mcp__public-health-counts__rsv_hospital_admissions_weekly untrusted-input
mcp__public-health-counts__drug_overdose_deaths_12mo untrusted-input

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/uk.co.reliness/public-health-counts/verify?hash=f5aff7385d1a59dcf13de135e6f4fa10117c2b19be1482d4ed90339206b91ef6" | jq -e '.changed == false'

Pinned hash f5aff7385d1a, from Nov 7, 2026, 00:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/uk.co.reliness/public-health-counts/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/uk.co.reliness/public-health-counts.svg)](https://anlyon.dev/servers/uk.co.reliness/public-health-counts)

Source: MCP Registry. Synced Nov 7, 2026, 00:18 UTC.