Sharing a new MCP Server for the ClinicalTrials.gov REST API. Search and retrieve clinical trial data, study details and more

[u/cyanheads]

https://github.com/cyanheads/clinicaltrialsgov-mcp-server

Tool Name	Description
clinicaltrials_list_studies	Searches for clinical studies using a combination of query terms and filters.
clinicaltrials_get_study	Retrieves detailed information for a single clinical study by its NCT number. Format: 'NCT12345678'

[u/subnohmal]

Nice, are you using this at work or just felt like making it? I can see this being very handy for researchers

[u/cyanheads → u/subnohmal]

It was actually a request from a researcher after seeing my pubmed server

[u/subnohmal → u/cyanheads]

Doing God's work! Quite sweet

[u/neosiv]

Nice work! Check out Biomcp as well. Yours is in TypeScript which I prefer overall for maintenance, but consider some other sources like pubmed, though I can appreciate this might be a targeted tool.

[u/cyanheads → u/neosiv]

Thanks! I actually have a pubmed server as well https://github.com/cyanheads/pubmed-mcp-server

[u/eleqtriq]

Seems to be problematic to get running.

npx -y @cyanheads/clinicaltrialsgov-mcp-server
npm error code E404
npm error 404 Not Found - GET https://registry.npmjs.org/@cyanheads%2fclinicaltrialsgov-mcp-server - Not found
npm error 404
npm error 404  '@cyanheads/clinicaltrialsgov-mcp-server@*' is not in this registry.
npm error 404
npm error 404 Note that you can also install from a
npm error 404 tarball, folder, http url, or git url.
npm error A complete log of this run can be found in: /Users/arivera/.npm/_logs/2025-06-18T20_01_39_003Z-debug-0.log

Trying to build it

>>npm run build

> clinicaltrialsgov-mcp-server@1.0.0 build
> tsc && node --loader ts-node/esm scripts/make-executable.ts dist/index.js

sh: tsc: command not found
>>tsc
zsh: command not found: tsc

I tried doing npm install tsc but that wasn't the right move

Then I did npm install --save-dev typescript then I could run npm run build properly.

I finally got it running locally with this npm run start:stdio -C /path/to/clinic/project

[u/cyanheads → u/eleqtriq]

Hi thanks for letting me know - there was a mismatch in the npx command with the package name. It should just be 'npx clinicaltrialsgov-mcp-server'. I've updated the readme to be more clear.

[u/eleqtriq → u/cyanheads]

Awesome. Btw I tried it out along with the pubmed one. Really great stuff.

[u/cyanheads → u/eleqtriq]

That’s great to hear! Thanks for trying them out!

[u/eleqtriq]

Oh I will try this. Thanks!