Nonprofit Explorer MCP Server
MCP server for nonprofit financials via ProPublica: IRS Form 990 data for 1.8M+ nonprofits.
Connect it
Settings → Connectors → Add custom connector
URL: https://nonprofit-explorer.caseyjhand.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://nonprofit-explorer.caseyjhand.com/mcp{
"mcpServers": {
"nonprofit-explorer-mcp-server": {
"url": "https://nonprofit-explorer.caseyjhand.com/mcp"
}
}
}claude mcp add --transport http nonprofit-explorer-mcp-server https://nonprofit-explorer.caseyjhand.com/mcp{
"servers": {
"nonprofit-explorer-mcp-server": {
"type": "http",
"url": "https://nonprofit-explorer.caseyjhand.com/mcp"
}
}
}{
"mcpServers": {
"nonprofit-explorer-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/nonprofit-explorer-mcp-server@0.1.10"
]
}
}
}claude mcp add nonprofit-explorer-mcp-server -- npx -y @cyanheads/nonprofit-explorer-mcp-server@0.1.103 tools, verified live
nonprofit_searchread-onlySearch 1.8M+ IRS-recognized tax-exempt organizations by name, keyword, city, or phrase. Optionally narrow by US state, NTEE major sector (1â10), or 501(c) subsection type. Returns EINs â pass them to nonprofit_get_organization or nonprofit_get_filings for details. Results are paginated at 25 per page; use the page parameter and num_pages to paginate. Total results cap at 10,000 in the API; if
nonprofit_get_organizationread-onlyFull profile for a single tax-exempt org by EIN: legal name, address, NTEE classification, 501(c) type, IRS ruling date, and a financial snapshot from the most recent Form 990 filing (revenue, expenses, assets, net assets, and the source PDF link). Also returns the IRS Business Master File standing â whether contributions are deductible, exemption status, and public-charity vs. private-foundatio
nonprofit_get_filingsread-onlyAll Form 990 filings for a tax-exempt org by EIN: year-by-year revenue, expenses, assets, liabilities, net assets, revenue breakdown, executive compensation, and source PDF links. Use for trend analysis, due diligence, and accessing primary 990 documents. The filing year (tax_prd_yr) is the fiscal year of the return â data lags 1â2 years; always cite the year. An organization that resolves but
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