Clinicaltrialsgov is a remote MCP server that gives an AI agent 7 tools, among them clinicaltrials_find_eligible, clinicaltrials_get_field_definitions, clinicaltrials_get_field_values. It answers at https://clinicaltrials.caseyjhand.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 21 October 2026, succeeded.
Search ClinicalTrials.gov — find studies, retrieve results, match patients to eligible trials.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
clinicaltrials_find_eligible | Match patient demographics and conditions to eligible recruiting clinical trials. Provide age, sex, conditions, and location to find studies with matching eligibility criteria, contact information, and recruiting locations. Results are re-r Inputs: age, sex, conditions, location, healthyVolunteer, recruitingOnly |
clinicaltrials_get_field_definitions | Resolve valid field names from the ClinicalTrials.gov data model — the canonical PascalCase identifiers (OverallStatus, EnrollmentCount, LeadSponsorName) accepted by the `fields`, `advancedFilter`, and `sort` parameters of other tools, and Inputs: mode, query, path, limit, includeIndexedOnly |
clinicaltrials_get_field_values | Discover valid values for ClinicalTrials.gov fields with study counts per value. Use to explore available filter options before building a search — e.g., valid OverallStatus, Phase, InterventionType, StudyType, or LeadSponsorClass values. Inputs: fields |
clinicaltrials_get_study_count | Get total clinical trial study count from ClinicalTrials.gov matching a query, without fetching study data. Fast and lightweight. Use for quick statistics or to build breakdowns by calling multiple times with different filters (e.g., count Inputs: query, conditionQuery, interventionQuery, locationQuery, sponsorQuery, titleQuery |
clinicaltrials_get_study_record | Fetch a single clinical trial study by NCT ID from ClinicalTrials.gov. Returns the full study record including protocol details, eligibility criteria, outcomes, arms, interventions, contacts, and locations. Optional locationLimit / outcomeL Inputs: nctId, locationLimit, outcomeLimit, referenceLimit, nearLocation |
clinicaltrials_get_study_results | Fetch clinical trial results data from ClinicalTrials.gov for completed studies — outcome measures with statistics, adverse events, participant flow, baseline characteristics, and results metadata (limitations & caveats, certain-agreement d Inputs: nctIds, sections, summary, outcomeLimit, adverseEventLimit, outcomeOffset |
clinicaltrials_search_studies | Search for clinical trial studies from ClinicalTrials.gov. Supports full-text and field-specific queries, status/phase/geographic filters, pagination, sorting, and field selection. Returns a compact per-study index by default; pass the fiel |
Every block below points at https://clinicaltrials.caseyjhand.com/mcp. Pick your client and copy.
claude mcp add --transport http clinicaltrialsgov https://clinicaltrials.caseyjhand.com/mcp
{
"mcpServers": {
"clinicaltrialsgov": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://clinicaltrials.caseyjhand.com/mcp"]
}
}
}{
"mcpServers": {
"clinicaltrialsgov": {
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"servers": {
"clinicaltrialsgov": {
"type": "http",
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"context_servers": {
"clinicaltrialsgov": {
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"mcpServers": {
"clinicaltrialsgov": {
"serverUrl": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"mcpServers": {
"clinicaltrialsgov": {
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}name: Clinicaltrialsgov
version: 0.0.1
schema: v1
mcpServers:
- name: Clinicaltrialsgov
type: streamable-http
url: https://clinicaltrials.caseyjhand.com/mcp{
"mcpServers": {
"clinicaltrialsgov": {
"httpUrl": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"mcpServers": {
"clinicaltrialsgov": {
"type": "http",
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"mcpServers": {
"clinicaltrialsgov": {
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fclinicaltrials.caseyjhand.com%2Fmcp&type=streamable_http&id=clinicaltrialsgov&name=Clinicaltrialsgov
It answered our last check on 21 October 2026 in 653 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
7, as returned by the server's own tools/list on 13 September 2026: clinicaltrials_find_eligible, clinicaltrials_get_field_definitions, clinicaltrials_get_field_values, clinicaltrials_get_study_count, clinicaltrials_get_study_record, clinicaltrials_get_study_results, clinicaltrials_search_studies.
It answered our last check on 21 October 2026 in 653 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://clinicaltrials.caseyjhand.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.cyanheads. Endpoint host: clinicaltrials.caseyjhand.com. ARD identifier: urn:air:io.github.cyanheads:mcp:clinicaltrialsgov-mcp-server.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.