I built & publicly host a handful of MCP servers - free to use, no API keys/auth needed
Hi there, I wanted to share something I've been working on. I've built a collection of MCP servers that are all hosted and publicly available. You can point any MCP client (like Claude/ChatGPT) at them and start using them immediately - no setup/install, no keys/auth, nothing running locally.
Here's what's live right now:
Health and science:
- https://cdc.caseyjhand.com/mcp - 1,487+ CDC public health datasets covering disease surveillance, mortality, vaccinations
- https://clinicaltrials.caseyjhand.com/mcp - ClinicalTrials gov search
- https://openfda.caseyjhand.com/mcp - FDA drugs, food, devices, and recalls via openFDA
- https://pubchem.caseyjhand.com/mcp - PubChem chemical database
- https://openalex.caseyjhand.com/mcp - 270M+ academic publications via OpenAlex
- https://pubmed.caseyjhand.com/mcp - PubMed biomedical literature
Academic:
- https://arxiv.caseyjhand.com/mcp - arXiv paper search and full-text reading
Government and public data:
- https://congressgov.caseyjhand.com/mcp - U.S. congressional data
- https://nhtsa.caseyjhand.com/mcp - NHTSA vehicle safety, recalls, complaints, crash ratings, VIN decoding
- https://nws.caseyjhand.com/mcp - Real-time US weather forecasts, alerts, and observations from the National Weather Service
- https://secedgar.caseyjhand.com/mcp - SEC EDGAR filings and financials
Utility:
- https://hn.caseyjhand.com/mcp - Hacker News feeds and search
- https://calculator.caseyjhand.com/mcp - Math evaluation, simplification, derivatives
To use any of these, just add the /mcp URL as a remote MCP server in your client. In Claude Desktop, that looks like this:
Adding a Remote MCP server to Claude
They're all built on @cyanheads/mcp-ts-core, an agent-native TypeScript framework I maintain for building MCP servers. If you want to build your own, npx @cyanheads/mcp-ts-core init my-mcp-server will scaffold a project for you. CD into that new directory and start up your coding agent; describe what you want to build and they can take it from there.
I have a bunch of other MCP servers too (local tools, git operations, Obsidian, etc.) that aren't hosted but work great as stdio servers. Full list is on my GitHub profile.
Happy to answer questions about any of them. Thanks for reading!