clinicaltrialsgov-mcp-server

MCP server for ClinicalTrials.gov v2 API. Search, retrieve, compare, and analyze trials.

stdio v1.9.2

Connection Configuration

Add this to your AI agent's MCP config file to connect.

Run in your terminal:

claude mcp add io.github.cyanheads--clinicaltrialsgov-mcp-server -- bun

Transport

stdio

Authentication

None

Version

v1.9.2

Server Name

io.github.cyanheads/clinicaltrialsgov-mcp-server

Last Updated

Mar 9, 2026

How to install and connect this MCP server.

Environment variables you must provide when running this server.

Variable	Description	Required
`MCP_LOG_LEVEL`	Sets the minimum log level for output (e.g., 'debug', 'info', 'warn', 'error').	Optional
`STORAGE_PROVIDER_TYPE`	Storage provider type: 'in-memory', 'filesystem', 'supabase', 'cloudflare-r2', 'cloudflare-kv', or 'cloudflare-d1'.	Optional
`MCP_HTTP_HOST`	The hostname for the HTTP server.	Optional
`MCP_HTTP_PORT`	The port to run the HTTP server on.	Optional
`MCP_HTTP_ENDPOINT_PATH`	The endpoint path for the MCP server.	Optional
`MCP_AUTH_MODE`	Authentication mode to use: 'none', 'jwt', or 'oauth'.	Optional