nonprofit-explorer-mcp-server

io.github.cyanheads/nonprofit-explorer-mcp-serverVersion 0.3.0

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

Status

Responds251 msNov 14, 2026, 14:48 UTCAnswered our handshake without sign-in.

Registry data may be out of date

We could not refresh it, so this page shows the last copy.

Last checked: Nov 14, 2026, 14:48 UTC
Latency: 251 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://nonprofit-explorer.caseyjhand.com/mcpResponds251 msNov 14, 2026, 14:48 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: nonprofit-explorer-mcp-server
Remote MCP server URL: https://nonprofit-explorer.caseyjhand.com/mcp

Cursor

{
  "mcpServers": {
    "nonprofit-explorer-mcp-server": {
      "url": "https://nonprofit-explorer.caseyjhand.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"nonprofit-explorer-mcp-server","type":"http","url":"https://nonprofit-explorer.caseyjhand.com/mcp"}'

Streamable HTTP

npm: @cyanheads/nonprofit-explorer-mcp-server 0.3.0

Package only

npm (npx)

claude mcp add nonprofit-explorer-mcp-server -- npx -y @cyanheads/nonprofit-explorer-mcp-server@0.3.0

Streamable HTTP

npm: @cyanheads/nonprofit-explorer-mcp-server 0.3.0

Package only

npm (npx)

claude mcp add nonprofit-explorer-mcp-server -- npx -y @cyanheads/nonprofit-explorer-mcp-server@0.3.0

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Tools

3 tools

Tools of nonprofit-explorer-mcp-server
	Description		Read-only	Idempotent	Open world
`nonprofit_get_filings`Form 990 history by EIN with extracted financials, form-specific compensation, and PDF-only returns. Optional inclusive from_year/to_year bounds select fiscal years across both histories; omitted bounds return full history. Unfiltered totals remain available. Records are sorted by full tax period without amendment precedence. Empty dataset history succeeds with BMF context; an empty selected window does not imply no history. Data lags 1–2 years; always cite tax_prd_yr. Data from ProPublica Nonprofit Explorer and IRS Form 990 filings.	Form 990 history by EIN with extracted financials, form-specific compensation, and PDF-only returns. Optional inclusive from_year/to_year bounds select fiscal years across both histories; omitted bounds return full history. Unfiltered totals remain available. Records are sorted by full tax period without amendment precedence. Empty dataset history succeeds with BMF context; an empty selected window does not imply no history. Data lags 1–2 years; always cite tax_prd_yr. Data from ProPublica Nonprofit Explorer and IRS Form 990 filings.	Not declared	Yes	Yes	Not declared
`nonprofit_get_organization`Full profile for a tax-exempt org by EIN: legal identity, IRS classification and BMF filing requirements, latest extracted financial snapshot, and latest return metadata across extracted and PDF-only histories. Use nonprofit_search_organizations first to resolve a name to an EIN. latest_filing is the latest extracted snapshot; latest_return may be newer. Data lags 1–2 years; always cite the fiscal year. Data from ProPublica Nonprofit Explorer and IRS Form 990 filings.	Full profile for a tax-exempt org by EIN: legal identity, IRS classification and BMF filing requirements, latest extracted financial snapshot, and latest return metadata across extracted and PDF-only histories. Use nonprofit_search_organizations first to resolve a name to an EIN. latest_filing is the latest extracted snapshot; latest_return may be newer. Data lags 1–2 years; always cite the fiscal year. Data from ProPublica Nonprofit Explorer and IRS Form 990 filings.	Not declared	Yes	Yes	Not declared
`nonprofit_search_organizations`Search 1.8M+ IRS-recognized tax-exempt organizations by name, keyword, city, or phrase. Optionally narrow by US state, NTEE major sector (1–10), or 501(c) subsection type. Returns EINs — 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 total_results === 10000 the actual count may be higher. A zero-match query and a page past the last one both return an empty organizations array with a notice rather than an error; only a page whose offset reaches that 10,000 cap is refused. Supports quoted phrases ("Red Cross"), required terms (+evanston), excluded terms (-dental). Data from ProPublica Nonprofit Explorer, sourced from IRS Form 990 filings.	Search 1.8M+ IRS-recognized tax-exempt organizations by name, keyword, city, or phrase. Optionally narrow by US state, NTEE major sector (1–10), or 501(c) subsection type. Returns EINs — 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 total_results === 10000 the actual count may be higher. A zero-match query and a page past the last one both return an empty organizations array with a notice rather than an error; only a page whose offset reaches that 10,000 cap is refused. Supports quoted phrases ("Red Cross"), required terms (+evanston), excluded terms (-dental). Data from ProPublica Nonprofit Explorer, sourced from IRS Form 990 filings.	Not declared	Yes	Not declared	Not declared

Details

Registry status: Active
Published: Nov 3, 2026
Updated: Nov 3, 2026
Website: Not given
Repository: https://github.com/cyanheads/nonprofit-explorer-mcp-server⁠ (opens in a new tab)
Categories (suggested): Finance and paymentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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