MCP server

Nonprofit Explorer

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

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkAbout 1,600 tokens per request once connected3 tools

Source

https://nonprofit-explorer.caseyjhand.com/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 3
Token cost: About 1,600 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.nonprofit-explorer-mcp-server]
url = "https://nonprofit-explorer.caseyjhand.com/mcp"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"nonprofit-explorer-mcp-server":{"type":"http","url":"https://nonprofit-explorer.caseyjhand.com/mcp"}}}

Antigravity

agy mcp add nonprofit-explorer-mcp-server https://nonprofit-explorer.caseyjhand.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"nonprofit-explorer-mcp-server","server_url":"https://nonprofit-explorer.caseyjhand.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"nonprofit-explorer-mcp-server","server_url":"https://nonprofit-explorer.caseyjhand.com/mcp"}

Tools

nonprofit_get_filings ~370 tokens
All 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 y
nonprofit_get_organization ~390 tokens
Full 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
nonprofit_search_organizations ~840 tokens
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 pag

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