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, DAF Administrators, Grant Officers, 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 appUse 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 501(c)(3)

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

Search by name

Fuzzy name search across the BMF — disambiguates the official entity from related affiliates.

Compare top nonprofits

Demonstrates the location + subsection + asset filtering — exactly the kind of question prospect researchers ask.

Sector breakdown

Aggregation across the location index — a sector-research workflow 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
Chat & MCP

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

Open Chat & MCP
REST API

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

Open 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.

IRS Nonprofit Lookup — Verify any 501(c)(3) by EIN, search 1.9M IRS-registered nonprofits by name or location, and compare | MCPBundles