HerStack

by herstack.co.uk · remote · no sign-in to list tools · v1.2.1 · published by uk.co.herstack

Read-only UK women's midlife health guidance: search, PubMed-backed evidence, supplement picks.

Changes · 5

Compare Registry entry

5 tools: 5 change things.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things5Claude Code: ask: see these tools
Only reads0Claude Code: allow

5 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http herstack https://herstack.co.uk/api/mcp

Findings

Matches of fixed checks, with the text they matched.

5 warn

Warnsearch_guidance
The server marks "search_guidance" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "search_guidance" says "search": a word for reading.
What this check looks for
Warnget_topic_guidance
The server marks "get_topic_guidance" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_topic_guidance" says "get": a word for reading.
What this check looks for
Warnrecommend_supplements
The server marks "recommend_supplements" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "call": a word for a change.
What this check looks for
Warnget_evidence
The server marks "get_evidence" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_evidence" says "get": a word for reading.
What this check looks for
Warnget_product_details
The server marks "get_product_details" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_product_details" says "get": a word for reading.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

5 tools

Changes things 5Creates or changes something that can be changed back.Claude Code: ask

get_evidenceCall this when the user (or you) wants the studies behind a recommendation or claim.1 finding
Why it is in this group
- The name "get_evidence" says "get": a word for reading.
- The description's first verb is "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "get_evidence" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_evidence" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Call this when the user (or you) wants the studies behind a recommendation or claim. Returns HerStack's evidence rows for a topic or nutrient with the cited studies resolved to PubMed and DOI identifiers, so the claim can be verified rather than trusted.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
- destructiveHint: false
- title: Get evidence
get_product_detailsCall this for one specific product.1 finding
Why it is in this group
- The name "get_product_details" says "get": a word for reading.
- The description's first verb is "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "get_product_details" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_product_details" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Call this for one specific product. Returns one HerStack-recommended product by name or SKU: form, authorised claim, tier, price, purchase link, and every topic that recommends it with the rationale.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
- destructiveHint: false
- title: Get product details
get_topic_guidanceCall this when the user wants to understand a women's-health topic, not only buy something.1 finding
Why it is in this group
- The name "get_topic_guidance" says "get": a word for reading.
- The description's first verb is "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "get_topic_guidance" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_topic_guidance" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Call this when the user wants to understand a women's-health topic, not only buy something. Returns HerStack's expert guidance for one topic: plain-language framing, research findings, the evidence table with authorised claims, product criteria, and a FAQ that also explains the condition itself (for perimenopause: what it is, its timeline, when to see a GP).
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
- destructiveHint: false
- title: Get topic guidance
recommend_supplementsCall this when the user wants specific supplement product picks for a topic.1 finding
Why it is in this group
- The description's first verb is "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "recommend_supplements" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "call": a word for a change.
  What this check looks for
Description, as the server wrote it
Call this when the user wants specific supplement product picks for a topic. Returns HerStack's named product recommendations from the site's reference brand, each with formulation rationale, the GB-authorised health claim verbatim (or a research-context note where none exists), price and purchase link. Provide a topic, or a concern in plain words that routes to one.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
- destructiveHint: false
- title: Recommend supplements
search_guidanceCall this first when a user describes their situation or asks a question in their own words (for example: 'I'm 47, tired all the time and bloated, what should I take?').1 finding
Why it is in this group
- The name "search_guidance" says "search": a word for reading.
- The description's first verb is "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "search_guidance" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "search_guidance" says "search": a word for reading.
  What this check looks for
Description, as the server wrote it
Call this first when a user describes their situation or asks a question in their own words (for example: 'I'm 47, tired all the time and bloated, what should I take?'). Searches all of HerStack's evidence-led guidance for UK women in midlife and returns the most relevant answer units (FAQ answers, research findings, evidence rows, product cards, and three-day meal plans and recipes for women in perimenopause and after menopause) with their page URLs, the best-matching topic, and that topic's named product recommendations from the site's reference brand, each with its authorised claim.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
- destructiveHint: false
- title: Search guidance

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.

Install

Pinned to version 1.2.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http herstack https://herstack.co.uk/api/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json

{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__herstack__search_guidance",
      "mcp__herstack__get_topic_guidance",
      "mcp__herstack__recommend_supplements",
      "mcp__herstack__get_evidence",
      "mcp__herstack__get_product_details"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as herstack. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/uk.co.herstack/herstack/changes.xml

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

Anlyon alternative

5 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Compare with other servers for the same product.

Source: MCP Registry · repository. Synced Oct 21, 2026, 18:55 UTC.

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