Interactive App

IRS Nonprofit Lookup

Verify any 501(c)(3) by EIN, search 1.9M IRS-registered nonprofits by name or location, and compare the largest charities in any city — no spreadsheet required.

For: Foundations, donor-advised fund admins, grant officers, and fundraising prospect researchers

1.9M IRS tax-exempt organizations, refreshed daily
EIN lookup, fuzzy name search, and location browse
501(c)(3) status with deductibility and foundation class
NTEE category and asset-size rollups by city or state

Open the App Use from Claude / Cursor

Habitat for Humanity affiliates fuzzy name search results showing EIN, city, state, deductibility, foundation classification, and NTEE category

Fuzzy name search — Habitat for Humanity affiliates across cities with EIN, location, and category.

Try these examples

Each example opens the app pre-loaded with this query.

Verify a 501(c)(3)

The single most common workflow — pre-grant or pre-donation 501(c)(3) verification.

Top charities by city

Lands in the location + assets ranking view.

Sector breakdown

Shows the aggregation view that the IRS publication doesn't surface.

A closer look

Single-EIN verification card showing 501(c)(3) status, deductibility code, foundation classification, ruling date, and NTEE category for an IRS-registered nonprofit — EIN verification — full IRS record with deductibility, foundation class, and NTEE for a single nonprofit.

IRS Nonprofit Lookup app empty state with a search input and prompt suggestions for verifying a 501(c)(3) by EIN, finding nonprofits by name, and browsing the largest charities by city — Open the app, paste an EIN or charity name, and verify 501(c)(3) status against 1.9M IRS records.

Other ways to use IRS Nonprofit Lookup

Same data, different audiences.

Dataset

IRS Tax-Exempt Organizations — live data product, refresh cadence + sources documented.

Open dataset page

Chat & MCP

Use the same data from Claude, Cursor or ChatGPT. AI agents can call every tool the app uses.

Setup guide

REST API

Call every tool from your own backend. OpenAPI spec + cURL examples.

View API docs

About this app

Search and verify 1.9M+ IRS-registered tax-exempt organizations. EIN lookup, fuzzy name search, location browse, 501(c)(3) verification, and financial data. Updated daily from the IRS Exempt Organizations Business Master File.