What is the main functional difference between Clinicaltrialsgov MCP Server and HerStack?

Clinicaltrialsgov MCP Server is categorized under Biology, Medicine and Bioinformatics and uses a local stdio subprocess. HerStack belongs to Biology, Medicine and Bioinformatics and uses an install path we have not confirmed yet. Pick Clinicaltrialsgov MCP Server for biology, medicine and bioinformatics work and HerStack for biology, medicine and bioinformatics.

How do I install Clinicaltrialsgov MCP Server or HerStack in Claude Desktop, Cursor, or Windsurf?

Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. HerStack has no confirmed install command yet — follow its own setup instructions.

Are Clinicaltrialsgov MCP Server and HerStack free to use, or do they require API keys?

Clinicaltrialsgov MCP Server has no declared pricing — check the project's own site. HerStack is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.

Can I run both Clinicaltrialsgov MCP Server and HerStack at the same time in my AI client?

Yes. MCP clients support multiple servers: add clinicaltrialsgov-mcp-server and herstack-2 as separate keys in the same mcpServers object, and your assistant will call tools from either one.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Clinicaltrialsgov MCP Server has a quality signal of 61/100 (Good) with 1 views, 0 installs and 99 GitHub stars. HerStack has 53/100 (Good) with 0 views, 0 installs and 0 GitHub stars.

Clinicaltrialsgov MCP… vs HerStack

Clinicaltrialsgov MCP… vs HerStack | AllMCPs

Feature & specification comparison

Rows where the two servers differ are marked.

Spec	Clinicaltrialsgov MCP Server	H HerStack
Category	Biology, Medicine and Bioinformatics	Biology, Medicine and Bioinformatics
Quality signal	61/100 · Good	53/100 · Good
Install command	Confirmed	Not confirmed yet
Transport	Local subprocess (stdio)	—
Auth	Not declared	No auth required
Pricing	Not declared	Free
Required env vars	None listed	None listed
Verified owner	Community listing	Community listing
GitHub stars	99	0
Directory activity	1 views 0 installs 0 upvotes	0 views 0 installs 0 upvotes
Tools	7	5
Full listing	View Clinicaltrialsgov MCP Server	View HerStack

Tools & capabilities

Clinicaltrialsgov MCP Server tools 7

clinicaltrials_search_studiesSearch studies with full-text and field-specific queries, status/phase/geographic filters, pagination, sorting, and field selection
clinicaltrials_get_study_recordFetch a single study by NCT ID — full protocol record with optional location/outcome/reference caps
clinicaltrials_get_study_countFast total study count for a query, without fetching data
clinicaltrials_get_field_valuesDiscover valid values for API fields, with per-value study counts
clinicaltrials_get_field_definitionsResolve valid field names — keyword search, path drill-down, or top-level overview
clinicaltrials_get_study_resultsFetch posted results — outcomes, adverse events, participant flow, baseline — for completed studies
clinicaltrials_find_eligibleMatch patient demographics and conditions to candidate recruiting trials, without checking inclusion/exclusion criteria

HerStack tools 5

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 evidence-led guidance for UK women in midlife and returns the most relevant answer units (FAQ answers, research findings, evidence rows, product cards) 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.
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 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).
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-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.
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 identifiers, so the claim can be verified rather than trusted.
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.

Ready-to-paste client configs

Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.

Clinicaltrialsgov MCP Server

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "bunx",
      "args": [
        "clinicaltrialsgov-mcp-server@latest"
      ]
    }
  }
}

HerStack

No confirmed install command for HerStack yet — follow the setup steps linked from its listing page rather than a guessed package name.

Clinicaltrialsgov MCP Server vs HerStack

Which MCP server should you choose?

Choose Clinicaltrialsgov MCP Server when

H
Choose HerStack when

Feature & specification comparison

Tools & capabilities

Clinicaltrialsgov MCP Server tools 7

HerStack tools 5

Ready-to-paste client configs

Clinicaltrialsgov MCP Server

HerStack

Frequently asked questions

Choose Clinicaltrialsgov MCP Server when

HChoose HerStack when

Clinicaltrialsgov MCP Server tools 7

HerStack tools 5

Clinicaltrialsgov MCP Server

HerStack

Frequently asked questions

What is the main functional difference between Clinicaltrialsgov MCP Server and HerStack?

How do I install Clinicaltrialsgov MCP Server or HerStack in Claude Desktop, Cursor, or Windsurf?

Are Clinicaltrialsgov MCP Server and HerStack free to use, or do they require API keys?

Can I run both Clinicaltrialsgov MCP Server and HerStack at the same time in my AI client?

Which MCP server has higher directory engagement and quality ratings?

Popular comparisons with Clinicaltrialsgov MCP Server

Popular comparisons with HerStack

H
Choose HerStack when