Do I need an API Key or registration?

No. ClinicalTrials.gov is a fully public service maintained by the US National Library of Medicine. All data is accessible without any authentication.

What types of studies can I search for?

The database covers interventional trials (testing drugs, devices, procedures), observational studies, and expanded access programs. You can search across all phases, from early Phase 1 research to post-market Phase 4 surveillance.

Is the trial recruiting status updated in real time?

The data reflects what is currently published on the ClinicalTrials.gov database. Sponsors typically update the registry directly, so you will see the latest status logged in their system.

ClinicalTrials.gov MCP Server for Google ADK 3 tools — connect in under 2 minutes

Name: ClinicalTrials.gov
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 3 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add ClinicalTrials.gov as an MCP tool provider through the Vinkius and your ADK agents can call every tool with full schema introspection.

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python

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token — get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="clinicaltrialsgov_agent",
    instruction=(
        "You help users interact with ClinicalTrials.gov "
        "using 3 available tools."
    ),
    tools=[mcp_tools],
)

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About ClinicalTrials.gov MCP Server

The ClinicalTrials.gov MCP Server connects your AI agent to the United States National Institutes of Health (NIH) clinical research database — the gold standard for clinical trial transparency worldwide.

Google ADK natively supports ClinicalTrials.gov as an MCP tool provider — declare the Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 3 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

Core Capabilities

Universal Trial Search — Query over 500,000 registered studies by condition, drug name, sponsor, or any keyword. Filter by recruitment status and trial phase to pinpoint exactly what matters.
Deep Trial Profiles — Retrieve full study protocols including eligibility criteria, enrollment targets, intervention details, and sponsor information for any registered trial.
Active Recruitment Finder — Dedicated tool for patients and clinicians to discover trials actively enrolling participants right now, searchable by medical condition.

Zero authentication required. Fully open public data maintained by the National Library of Medicine. Critical for pharmaceutical researchers, healthcare professionals, patient advocates, and biotech analysts.

The ClinicalTrials.gov MCP Server exposes 3 tools through the Vinkius. Connect it to Google ADK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect ClinicalTrials.gov to Google ADK via MCP

Follow these steps to integrate the ClinicalTrials.gov MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 3 tools from ClinicalTrials.gov via MCP

Why Use Google ADK with the ClinicalTrials.gov MCP Server

Google ADK provides unique advantages when paired with ClinicalTrials.gov through the Model Context Protocol.

Google ADK natively supports MCP tool servers — declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with ClinicalTrials.gov

Production-ready features like session management, evaluation, and deployment come built-in — not bolted on

Seamless integration with Google Cloud services means you can combine ClinicalTrials.gov tools with BigQuery, Vertex AI, and Cloud Functions

ClinicalTrials.gov + Google ADK Use Cases

Practical scenarios where Google ADK combined with the ClinicalTrials.gov MCP Server delivers measurable value.

Enterprise data agents: ADK agents query ClinicalTrials.gov and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine ClinicalTrials.gov tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query ClinicalTrials.gov regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including ClinicalTrials.gov

ClinicalTrials.gov MCP Tools for Google ADK (3)

These 3 tools become available when you connect ClinicalTrials.gov to Google ADK via MCP:

find_recruiting_trials

Useful for patients and healthcare providers looking for active enrollment opportunities. Find clinical trials that are actively recruiting participants for a specific medical condition

get_trial_details

Retrieve full details of a specific clinical trial by its NCT identifier

search_clinical_trials

Can filter by recruitment status and trial phase. Search the ClinicalTrials.gov database for studies by keyword, condition, drug name, or sponsor

Example Prompts for ClinicalTrials.gov in Google ADK

Ready-to-use prompts you can give your Google ADK agent to start working with ClinicalTrials.gov immediately.

"Are there any clinical trials recruiting participants for Alzheimer's disease right now?"

"Show me Phase 3 trials related to breast cancer treatment."

"Get me the full details for trial NCT04280705."

Troubleshooting ClinicalTrials.gov MCP Server with Google ADK

Common issues when connecting ClinicalTrials.gov to Google ADK through the Vinkius, and how to resolve them.

McpToolset not found

Update: pip install --upgrade google-adk

ClinicalTrials.gov + Google ADK FAQ

Common questions about integrating ClinicalTrials.gov MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.