IRS 990 Nonprofit Data MCP Server

by olyport Your server? Claim it

answering

IRS 990 Nonprofit Data is answering right now. Last checked 11 min ago. It exposes 3 tools.

Nonprofit lookup and IRS 990 filing data: revenue, assets, and compensation via ProPublica

Uptime history 47 days of history

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

562 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check IRS 990 Nonprofit Data every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add irs-990 --transport http https://mcp.olyport.com/irs-990/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "irs-990": {
      "url": "https://mcp.olyport.com/irs-990/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.irs-990]
url = "https://mcp.olyport.com/irs-990/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "irs-990": {
      "url": "https://mcp.olyport.com/irs-990/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "irs-990": {
      "url": "https://mcp.olyport.com/irs-990/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

nonprofit

get_nonprofit_details

Get detailed information about a nonprofit organization by EIN. Returns comprehensive data from the organization's IRS 990 filings including revenue, expenses, assets, executive compensation, and filing history. Use search_nonprofits first to find the EIN. Args: ein: Employer Identification Number (e.g. '13-1837418' or '131837418').

get_nonprofit_filings

Get the filing history for a nonprofit organization. Returns a list of all available IRS 990 filings for the organization, including both filings with parsed data and those without. Useful for tracking financial trends over time. Args: ein: Employer Identification Number (e.g. '13-1837418' or '131837418').

nonprofits

search_nonprofits

Search for nonprofit organizations by name or keyword. Searches the ProPublica Nonprofit Explorer database of IRS 990 filers. Returns organization name, EIN, location, revenue, and tax status. Args: query: Search keywords (e.g. 'food bank', 'habitat for humanity'). state: Two-letter state abbreviation to filter by (e.g. 'CA', 'TX'). ntee_code: NTEE major category code (1-10). 1=Arts, 2=Education, 3=Environment, 4=Health, 5=Human Services, 6=International, 7=Public Benefit, 8=Religion, 9=Mutual Benefit, 10=Unknown. c_code: IRS subsection code (e.g. 3 for 501(c)(3), 4 for 501(c)(4)). page: Zero-indexed page number (25 results per page).

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.olyport.com/irs-990/mcp	streamable-http	answering	556 ms	11 min ago

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IRS 990 Nonprofit Data — questions

Answers built from our own checks of this server.

What can IRS 990 Nonprofit Data do?

It exposes 3 tools, read directly from the server on our last check. Among them: get_nonprofit_details, get_nonprofit_filings, search_nonprofits. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is IRS 990 Nonprofit Data working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 562 ms. The bar chart above shows every period we have measured.

How do I connect IRS 990 Nonprofit Data?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does IRS 990 Nonprofit Data need an API key?

No. IRS 990 Nonprofit Data completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is IRS 990 Nonprofit Data?

It answers our handshake in 562 ms on average, which is faster than 24% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.