# US Nonprofit & Charity Check

> Check any US charity by name or EIN — Form 990 revenue, expenses, assets and exec pay — plus nonprofit prospect lists.

Remote MCP server (Streamable HTTP): https://us-nonprofit-check-mcp.donniertf.workers.dev/mcp
Free tier: `nonprofit_check` — no key, no sign-up, 20 calls/day per IP.
Pro: $9/month, cancel anytime — all tools, unlimited.

## Tools
- nonprofit_check (free): FREE. Find a US nonprofit/charity by name or EIN — top 3 with city, state and 501(c) type.
- financials (Pro): PRO. Form 990 financial history for an EIN: revenue, expenses, assets, liabilities, officer compensation, program/overhead ratio by year.
- prospect_list (Pro): PRO. Nonprofits matching a keyword in a state (e.g. 'food bank', 'hospital', 'school') — for fundraising consultants, SaaS and grant writers.

## Buying (agents)
1. POST https://us-nonprofit-check-mcp.donniertf.workers.dev/checkout -> {checkout_url, session_id}. A human (or a payment-capable agent) completes Stripe Checkout at checkout_url.
2. GET https://us-nonprofit-check-mcp.donniertf.workers.dev/token?session_id=... -> {access_token}.
3. Send Authorization: Bearer <access_token> to https://us-nonprofit-check-mcp.donniertf.workers.dev/mcp (or pass access_token in tool arguments).

## Pay per call (x402, USDC on Base)
No account: POST JSON args to https://us-nonprofit-check-mcp.donniertf.workers.dev/x402/<tool> -> HTTP 402 with payment requirements ($0.02 USDC per call, payTo 0x02226D28e0c85AE4AdDB7fe7043Dd2b1Ff710D41). Retry with an X-PAYMENT header (x402 v1, scheme exact, network base). Manifest: https://us-nonprofit-check-mcp.donniertf.workers.dev/.well-known/x402. MCP clients may also send X-PAYMENT on tools/call.
Machine-readable pricing: https://us-nonprofit-check-mcp.donniertf.workers.dev/pricing.json · Server card: https://us-nonprofit-check-mcp.donniertf.workers.dev/.well-known/mcp

## Sources
- ProPublica Nonprofit Explorer API (IRS Form 990 data)

## Notes
From ProPublica Nonprofit Explorer (IRS Form 990 data). Figures lag 1–2 years; confirm tax-exempt status with IRS Tax Exempt Organization Search. Not tax advice.
Contact: dmorrisonwebdesign@gmail.com. More UK data MCPs: https://github.com/donniertf-hub/uk-mcp-fleet