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mcp/harbor
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nonprofit explorer mcp server MCP

v0.3.0 changelog · 8

io.github.cyanheads/nonprofit-explorer-mcp-server

MCP server for nonprofit financials via ProPublica: IRS Form 990 data for 1.8M+ nonprofits.

transport:streamable-http runtime:npm tools:3
View source

Target client

run in your project directory 

claude mcp add --transport http nonprofit-explorer-mcp-server https://nonprofit-explorer.caseyjhand.com/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

nonprofit_search_organizations

nonprofit search organizations

nonprofit_get_organization

nonprofit get organization

nonprofit_get_filings

nonprofit get filings

All 3 tools, one page each

1 resource you attach as context

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.