Nonprofits API
Verify any US nonprofit in one call: whether an EIN belongs to a real, IRS-recognized tax-exempt organization, and whether donations to it are deductible — with the basis for the answer stated (listed in IRS Publication 78, or the Business Master File deductibility code). Built on the IRS's own monthly source-of-truth files: all 1,957,340 organizations in the Exempt Organizations Business Master File, cross-flagged against the 1.4 million EINs in Publication 78. Every record carries the decoded 501(c) subsection, foundation type (church, school, hospital, publicly supported charity, private foundation...), NTEE activity classification with its category, ruling date, full address, and the organization's latest reported assets, income and revenue. An EIN that is not in the master file answers tax_exempt: false — the actionable result for a donation platform, matching-gift program or grant system, not a bare error. Search 1.96M organizations by name, state, city, zip, NTEE code or category, 501(c) subsection, foundation type, deductibility or revenue range; roll up the sector by NTEE category or state with organization counts and total revenue. EINs accept the hyphenated form (53-0196605). Self-hosted dataset refreshed from the IRS monthly publication cycle — no third-party calls at request time.
Available Endpoints
Request Parameters
API URL
Please subscribe to see the API URL
Headers
Please subscribe to see the actual API URL
import axios from 'axios';
const url = '{API_URL}';
const { data } = await axios.get(url, {
headers: { 'X-Api-Key': 'YOUR_API_KEY' }
});