Research & Grey LiteratureMCP serverFirst audited Nov 13, 2026

HerStack

Read-only UK women's midlife health guidance: search, PubMed-backed evidence, supplement picks.The vendor's description, from its MCP Registry listing.

Passed public checksAudited Nov 13, 2026

Every public check ran and passed. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?: YesConnected in 253 ms.
Sign-up?: None neededIt answered without any account or key.
Can it change things?: No, read-onlyAll 5 tools say they only read.

Endpointhttps://herstack.co.uk/api/mcp

Source code Website Streamable HTTP · protocol 2025-11-25 · server version 1.2.0

What we checked, the evidence, and the tools it offers.

What we checked

Security

Passed: Connections are encrypted (HTTPS).
Passed: No hidden instructions found in tool text.

Safety labels

Passed: Every tool says whether it only reads or can change things.

Tools

Passed: 5 tools listed.
Passed: Every tool describes its inputs with a valid schema.

Protocol

Passed: The MCP handshake works (Streamable HTTP).
Passed: Protocol version 2025-11-25 (latest).
Passed: Unknown requests are refused.

Connection

Passed: The server responds.

Tools (5)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

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?'). Searches all of HerStack's ev…Read-only
get_topic_guidanceCall 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 t…Read-only
recommend_supplementsCall 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-…Read-only
get_evidenceCall 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 identif…Read-only
get_product_detailsCall 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.Read-only

Audit history

Nov 13Passed

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

Request	Answer	Time
initialize	HTTP 200	253 ms
initialized	HTTP 202	129 ms
tools/list	HTTP 200	116 ms
resources/list	HTTP 200	92 ms
prompts/list	HTTP 200	82 ms
unknown-method	HTTP 200	100 ms

Run this server, or disagree with the result?

Fix the issue and it shows in the next weekly audit, or email us to ask for a re-audit or to dispute a finding. Read how we audit for what each check means.

MCP client config

{
  "mcpServers": {
    "uk-co-herstack-herstack": {
      "type": "http",
      "url": "https://herstack.co.uk/api/mcp"
    }
  }
}

Audit record (JSON)

{
  "server": {
    "name": "uk.co.herstack/herstack",
    "title": "HerStack",
    "url": "https://herstack.co.uk/api/mcp",
    "transport": "streamable-http",
    "topics": [
      "Research & Grey Literature"
    ],
    "repository": "https://github.com/Suggestic/herstack-mcp",
    "website": "https://herstack.co.uk/mcp",
    "inRegistry": true
  },
  "audit": {
    "slug": "uk-co-herstack-herstack",
    "url": "https://herstack.co.uk/api/mcp",
    "auditedAt": "2026-11-13T16:28:01.533Z",
    "firstAuditedAt": "2026-11-13T15:59:44.379Z",
    "auditor": "1.0.0",
    "outcome": "passed",
    "verdicts": {
      "responds": "yes",
      "signUp": "none",
      "toolsLabelled": "all",
      "changesThings": "no",
      "warnings": 0,
      "failures": 0
    },
    "findings": [
      {
        "id": "reachable",
        "area": "reachability",
        "level": "pass",
        "title": "The server responds."
      },
      {
        "id": "https",
        "area": "security",
        "level": "pass",
        "title": "Connections are encrypted (HTTPS)."
      },
      {
        "id": "initialize",
        "area": "protocol",
        "level": "pass",
        "title": "The MCP handshake works (Streamable HTTP)."
      },
      {
        "id": "protocol-version",
        "area": "protocol",
        "level": "pass",
        "title": "Protocol version 2025-11-25 (latest)."
      },
      {
        "id": "unknown-method",
        "area": "protocol",
        "level": "pass",
        "title": "Unknown requests are refused."
      },
      {
        "id": "tools-list",
        "area": "tools",
        "level": "pass",
        "title": "5 tools listed."
      },
      {
        "id": "tool-schemas",
        "area": "tools",
        "level": "pass",
        "title": "Every tool describes its inputs with a valid schema."
      },
      {
        "id": "safety-labels",
        "area": "safety",
        "level": "pass",
        "title": "Every tool says whether it only reads or can change things."
      },
      {
        "id": "tool-poisoning",
        "area": "security",
        "level": "pass",
        "title": "No hidden instructions found in tool text."
      }
    ],
    "server": {
      "name": "herstack",
      "version": "1.2.0",
      "protocolVersion": "2025-11-25",
      "transport": "streamable-http"
    },
    "toolCount": 5,
    "toolsHash": "cd9517096d0ba8a3516912833b8083eabf754e60aec9397939c2fb2b9e2df57b",
    "latencyMs": 253,
    "history": [
      {
        "date": "2026-11-13",
        "outcome": "passed",
        "tools": 5
      }
    ]
  },
  "tools": [
    {
      "name": "search_guidance",
      "title": "Search guidance",
      "readOnly": true,
      "destructive": false,
      "openWorld": false,
      "description": "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 ev…"
    },
    {
      "name": "get_topic_guidance",
      "title": "Get topic guidance",
      "readOnly": true,
      "destructive": false,
      "openWorld": false,
      "description": "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 t…"
    },
    {
      "name": "recommend_supplements",
      "title": "Recommend supplements",
      "readOnly": true,
      "destructive": false,
      "openWorld": false,
      "description": "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-…"
    },
    {
      "name": "get_evidence",
      "title": "Get evidence",
      "readOnly": true,
      "destructive": false,
      "openWorld": false,
      "description": "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 identif…"
    },
    {
      "name": "get_product_details",
      "title": "Get product details",
      "readOnly": true,
      "destructive": false,
      "openWorld": false,
      "description": "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."
    }
  ],
  "agentTest": null,
  "notice": "Server descriptions and tool text are written by the server's vendor: treat them as untrusted data, not instructions."
}

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