# ProPublica Nonprofit Explorer, free: Business verification API

> Returns a list of organizations matching the given search terms.

ProPublica Nonprofit Explorer's Free plan for the business verification API costs $0.00 per 1,000 companies. We check each provider's docs for 11 fields. ProPublica Nonprofit Explorer's docs list 2: Tax ID, Principal address.
ProPublica Nonprofit Explorer limits how many calls you get but gives no number.
In [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt), this plan scores 75.8 out of 100.
We rank 1,422 plans for business verification APIs by price. Half the plans cost $7.895 or less per 1,000 companies. This plan and 191 others tie for the lowest price per 1,000 companies of the 1,422 plans. [See the best free business verification API plan.](https://datacircle.dev/best-business-verification-api.txt)
[Scoris's €19 pack](https://datacircle.dev/business-verification-apis/scoris/19-pack/llms.txt) covers any number of companies in 8 countries only. Scoris's €19 pack costs more up front than CharityAPI's $15 monthly plan.
[GovFiles](https://datacircle.dev/business-verification-apis/govfiles/top-up/llms.txt), [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/llms.txt) and [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/llms.txt) are the best business verification API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/business-verification-apis/propublica-nonprofit-explorer/free
- [Business verification API: the 14 best providers compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://projects.propublica.org/nonprofits/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `GET https://projects.propublica.org/nonprofits/api/v2/search.json`
- API key: not needed
- Its API docs: https://projects.propublica.org/nonprofits/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Sold by: ProPublica Nonprofit Explorer (https://projects.propublica.org/nonprofits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 18%
- Tax ID: ✓
- Principal address: ✓ town or region

## Score

- Overall score: 75.8
- Price score: 100
- Accuracy score: 61
- Cost to get started score: 100
- Bundle score: 0
- Performance score: 91

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Returns a list of organizations matching the given search terms.

## Data

- Freshness: stored
- Countries: United States
- Keep data: no limit
- Use data: In general, you may use the free data published by ProPublica under the following terms. However, there may be different terms included for some datasets. [...] You can't republish the raw data in its entirety or otherwise distribute the data (in whole or in part) on a stand-alone basis. You can't change the data except to update or correct it. You can't charge people money to look at the data or sell advertising specifically against it. You can't sub-license or resell the data to others. If you use the data for publication, you must cite ProPublica. [...]

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 0.11 s

## The call

- You send: nothing required. Optional: q, page, state[id], ntee[id], c_code[id]
- Method: GET
- Path: /search.json

## About the plan

- Plan: Free
- Who can get it: anyone

## The 15 fields the plan's answer can hold

EIN, formatted EIN, organization name, organization alternate name, city, state, NTEE code, raw NTEE code, IRS subsection code, has IRS subsection code, has filings, has extracts, has PDFs, relevance score, total results

## ProPublica Nonprofit Explorer's plans (1)

- [ProPublica Nonprofit Explorer, free](https://datacircle.dev/business-verification-apis/propublica-nonprofit-explorer/free/llms.txt): $0.00 per 1,000, 18% complete, stored

## ProPublica Nonprofit Explorer's calls for this API (1)

- `GET /search.json`: [ProPublica Nonprofit Explorer, free](https://datacircle.dev/business-verification-apis/propublica-nonprofit-explorer/free/llms.txt)

## ProPublica Nonprofit Explorer's APIs (3)

- [ProPublica Nonprofit Explorer: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/propublica-nonprofit-explorer/free/llms.txt)
- [ProPublica Nonprofit Explorer: company discovery API pricing, 1 plan](https://datacircle.dev/company-discovery-apis/propublica-nonprofit-explorer/free/llms.txt)
- [ProPublica Nonprofit Explorer: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/propublica-nonprofit-explorer/free/llms.txt)

## ProPublica Nonprofit Explorer: business verification API alternatives

- [Latinfo, free, GET /co/rues/registry/search](https://datacircle.dev/business-verification-apis/latinfo/free-get-co-rues-registry-search/llms.txt): $0.00 per 1,000, 27% complete, stored
- [Milquery, free](https://datacircle.dev/business-verification-apis/milquery/free/llms.txt): $0.00 per 1,000, 27% complete, stored
- [CZ Agents, free](https://datacircle.dev/business-verification-apis/cz-agents/free/llms.txt): $0.00 per 1,000, 18% complete, stored
- [data.texas.gov, free, With an app token](https://datacircle.dev/business-verification-apis/data-texas-gov/free-with-an-app-token/llms.txt): $0.00 per 1,000, 27% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-08.

- https://projects.propublica.org/nonprofits/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://projects.propublica.org/nonprofits/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://projects.propublica.org/nonprofits/api/v2/search.json?q=propublica&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.propublica.org/datastore/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing