{"slug":"2s-io-api-nonprofit-search-6de827","title":"US 501(c) nonprofit organization search","host":"2s.io","method":"GET","resource":"https://2s.io/api/nonprofit/search","category":"code","description":"US 501(c) nonprofit organization search. Lookup by 9-digit EIN (with or without hyphen), free-text name, 2-letter state, NTEE category code (e.g. 'B99' for education), or IRS subsection code (3 = 501(c)(3), 4 = 501(c)(4), etc.). Each record includes EIN, name, city/state, NTEE code, subsection code ","price_listed":0.003,"price_asked":0.003,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":236,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"q":"Khan Academy"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"properties":{"method":{"const":"GET"},"queryParams":{"properties":{"ein":{"description":"9-digit EIN, with or without hyphen.","type":"string"},"nteeCode":{"description":"NTEE category (e.g., \"B99\").","type":"string"},"page":{"default":0,"description":"0-indexed page (100/page).","minimum":0,"type":"integer"},"q":{"description":"Free-text name search.","type":"string"},"state":{"description":"2-letter US state.","type":"string"},"subsectionCode":{"description":"IRS subsection (3 = 501(c)(3), etc.).","type":"integer"}}},"type":{"const":"http"}},"required":["type","method","queryParams"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.003,"price_match":true,"latency_ms":236,"error":null}],"description_full":"US 501(c) nonprofit organization search. Lookup by 9-digit EIN (with or without hyphen), free-text name, 2-letter state, NTEE category code (e.g. 'B99' for education), or IRS subsection code (3 = 501(c)(3), 4 = 501(c)(4), etc.). Each record includes EIN, name, city/state, NTEE code, subsection code + human-readable subsection description (e.g. '501(c)(3) Charitable / Religious / Educational'), and relevance score. Sourced from ProPublica Nonprofit Explorer, which aggregates IRS Form 990 + BMF data; underlying IRS data is public domain.","last_updated":"2026-09-22T04:07:03.83Z","schemes":["exact"]}