About propublica-npo-mcp
propublica-npo-mcp is an MCP server published by 2b3pro in the Search category: provides tools to search and retrieve nonprofit organization data and IRS filing summaries from ProPublica's Nonprofit Explorer, including side-by-side comparisons.
Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.
Install
git clone https://github.com/2b3pro/propublica-npo-mcpThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
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README
propublica-npo-mcp
MCP server exposing the ProPublica Nonprofit Explorer API with curated nonprofit and filing summaries.
Install
npm install
Run
npm run start
For local development:
npm run dev
Claude Desktop / Cline config
{
"mcpServers": {
"propublica-npo": {
"command": "npx",
"args": ["tsx", "/absolute/path/to/propublica-npo-mcp/src/index.ts"]
}
}
}
Tools
search_nonprofits searches the ProPublica Nonprofit Explorer index by name or keyword, with optional state, NTEE major category, 501(c) subtype, and page filters.
get_organization returns organization metadata plus a curated summary of up to five most recent filings by default. Pass verbose: true to get the raw upstream payload.
list_organization_filings returns all filings for an EIN, newest first. The default output is curated; verbose: true returns the raw filing arrays.
compare_nonprofits compares 2-5 organizations side by side using their latest filing with data, while preserving per-EIN 404s as row-level errors.
Notes
The server uses a 100-entry in-memory LRU cache with a 1-hour TTL. Each upstream request has a 15-second timeout and retries once on network or 5xx failures. ProPublica is public but still rate-limited; if you hit a 429, wait and retry rather than looping.
Support
If this project helps you research nonprofits or build cool agents, consider buying me a coffee! It helps keep the updates coming.
License
MIT License - Created by Ian Shen.
README copy captured when this server was indexed; it may lag the repository. The original is authoritative.