Nonprofit Explorer MCP server

by cyanheads·io.github.cyanheads/nonprofit-explorer-mcp-server·v0.1.8

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

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If you have run it, two minutes of your experience saves the next person an afternoon.

Nonprofit Explorer tools

Tool list not cached yet. `describe` through the gateway fetches it live.

Not scanned yet. New registry listings are scanned within a day of import.

Install directly

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

Add to Cursor

Nonprofit Explorer: common questions

Is Nonprofit Explorer MCP server safe?: Not known yet: the safety scan has not run. New listings are scanned within a few days.
How do I install Nonprofit Explorer?: It runs remotely at nonprofit-explorer.caseyjhand.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Nonprofit Explorer need an API key?: No secret keys are declared. It reads 7 settings from the environment.
Is Nonprofit Explorer maintained?: The latest release is v0.1.8.
Is Nonprofit Explorer up?: 100% of our last 1 checks got an answer. We check remote servers about four times a day.

Run it through the gateway

With the gateway added, ask your agent for it by name:

agent prompt

call io.github.cyanheads/nonprofit-explorer-mcp-server → <tool>

Free per call. Metered, capped by your key, logged for reliability.

Add the gateway (gw.mcp.market)

Rating: —
Safety grade: Pending
Stars: –
Downloads/wk: –
Price: Free
Licence: —
Transport: Remote · mixed
Uptime: 100% · 1/1 checks
Version: 0.1.8
Category: Everything else
Last release: —

Credentials it needs

MCP_LOG_LEVELSets the minimum log level for output (e.g., 'debug', 'info', 'warn').
MCP_HTTP_HOSTThe hostname for the HTTP server.
MCP_HTTP_PORTThe port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATHThe endpoint path for the MCP server.
MCP_PUBLIC_URLPublic origin override for deployments behind a TLS-terminating reverse proxy.
MCP_AUTH_MODEAuthentication mode to use: 'none', 'jwt', or 'oauth'.
MCP_LOG_LEVELSets the minimum log level for output (e.g., 'debug', 'info', 'warn').

Endpoint

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

streamable-http

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