2s Nonprofit API
The nonprofit API from 2s — 2 operation(s) for nonprofit.
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OpenAPI Specification
openapi: 3.2.0
info:
title: 2s — the (most) everything Nonprofit API
version: '1'
summary: The (most) everything API.
description: 'The (most) everything API for AI agents: 575+ pay-per-call endpoints on one origin.'
contact:
name: 2s
url: https://2s.io
email: alley@2s.io
x-logo:
url: https://2s.io/icon-512.png
altText: 2s
x-guidance: 'Pay-per-call REST API for AI agents — hundreds of endpoints returning ground-truth data (US public records, company & legal identifiers, finance/SEC, crypto/web3, security & CVEs, medical codes, weather & geocoding, agriculture, energy, maritime, music, and more). Every endpoint is paid per call in USDC via x402 (Base or Solana) — no API key, no signup. Call any endpoint with no auth to get a 402 PaymentRequirements envelope, sign it (EIP-3009 on Base, partial SPL transfer on Solana), and retry with the PAYMENT-SIGNATURE header. Add ?trial=1 for one free real call per endpoint per hour to test before paying. To discover the right endpoint: GET https://2s.io/api/directory for the full catalog, or GET https://2s.io/api/search/endpoints?q=<natural-language task> for a ranked match. Per-call price is on each operation as x-payment-info (from $0.001). Batch up to 50 calls behind one payment via POST https://2s.io/api/batch/run.'
servers:
- url: https://2s.io
tags:
- name: nonprofit
paths:
/api/nonprofit/screen:
get:
tags:
- nonprofit
summary: Look up US 501(c) nonprofits and screen each result against
description: 'Look up US 501(c) nonprofits and screen each result against the OFAC sanctions list in one call. Pass q (organization name) or ein; each matched organization returns its registry record (EIN, name, location, NTEE code, subsection) plus a sanctions block — flagged status, match count, and the matching SDN entries with confidence scores. Grant-making due diligence, donation compliance, and charity-fraud triage. Components also standalone: /api/nonprofit/search (registry only) and /api/law/sanctions-check (screen any name). Same composition family as /api/business/entity-screen.'
operationId: nonprofit_screen
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: Nonprofits with a per-org OFAC sanctions block (flagged, matches, confidence).
content:
application/json:
schema:
type: object
required:
- data
- meta
properties:
data:
type: object
properties:
query:
type: string
count:
type: number
organizations:
type: array
items:
type: object
properties:
org:
type: object
additionalProperties: {}
description: Nonprofit registry record (EIN, name, location, NTEE).
sanctions:
type: object
properties:
found:
type: boolean
description: True when the screen ran successfully.
error:
type: string
nullable: true
flagged:
type: boolean
description: True when a high-confidence OFAC match exists.
matchCount:
type: number
matches:
type: array
items:
type: object
additionalProperties: {}
required:
- found
- error
- flagged
- matchCount
- matches
additionalProperties: false
required:
- org
- sanctions
additionalProperties: false
sources:
type: array
items:
$ref: '#/components/schemas/Source'
required:
- query
- count
- organizations
- sources
additionalProperties: false
meta:
$ref: '#/components/schemas/CallMeta'
'400':
$ref: '#/components/responses/BadRequest'
'402':
$ref: '#/components/responses/PaymentRequired'
'405':
$ref: '#/components/responses/MethodNotAllowed'
'500':
$ref: '#/components/responses/ServerError'
'502':
$ref: '#/components/responses/UpstreamError'
x-2s-id: nonprofit.screen
x-2s-version: null
x-2s-price:
usd: 0.0126
x-2s-accepts:
- x402
x-2s-response-shape: legacy
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.012600'
protocols:
- x402: {}
parameters:
- name: q
in: query
required: false
description: Organization name. Provide q or ein, not both.
schema:
type: string
minLength: 2
maxLength: 120
- name: ein
in: query
required: false
description: EIN.
schema:
type: string
pattern: ^\d{9}$
- name: limit
in: query
required: false
description: Maximum number of results to return.
schema:
type: integer
minimum: 1
maximum: 10
default: 5
- $ref: '#/components/parameters/TrialMode'
/api/nonprofit/search:
get:
tags:
- nonprofit
summary: US 501(c) nonprofit organization search
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 + 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.
operationId: nonprofit_search
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = matching nonprofit organizations; total = upstream match count; page = 0-indexed pagination (100/page); meta.query echoes the search.'
content:
application/json:
schema:
type: object
required:
- data
- meta
properties:
data:
type: object
properties:
ok:
type: boolean
enum:
- true
items:
type: array
items:
type: object
properties:
ein:
type: string
einFormatted:
type: string
name:
type: string
subName:
type: string
nullable: true
city:
type: string
nullable: true
state:
type: string
nullable: true
nteeCode:
type: string
nullable: true
subsectionCode:
type: integer
nullable: true
subsectionDesc:
type: string
nullable: true
score:
type: number
nullable: true
required:
- ein
- einFormatted
- name
- subName
- city
- state
- nteeCode
- subsectionCode
- subsectionDesc
- score
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
page:
type: object
properties:
number:
type: integer
size:
type: integer
pages:
type: integer
nullable: true
required:
- number
- size
- pages
additionalProperties: false
meta:
type: object
properties:
query:
type: object
properties:
q:
type: string
nullable: true
ein:
type: string
nullable: true
state:
type: string
nullable: true
nteeCode:
type: string
nullable: true
subsectionCode:
type: integer
nullable: true
page:
type: integer
required:
- q
- ein
- state
- nteeCode
- subsectionCode
- page
additionalProperties: false
returned:
type: integer
required:
- query
- returned
additionalProperties: false
required:
- ok
- items
- total
- source
additionalProperties: false
meta:
$ref: '#/components/schemas/CallMeta'
'400':
$ref: '#/components/responses/BadRequest'
'402':
$ref: '#/components/responses/PaymentRequired'
'405':
$ref: '#/components/responses/MethodNotAllowed'
'500':
$ref: '#/components/responses/ServerError'
'502':
$ref: '#/components/responses/UpstreamError'
x-2s-id: nonprofit.search
x-2s-version: null
x-2s-price:
usd: 0.003
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.003000'
protocols:
- x402: {}
parameters:
- name: q
in: query
required: false
description: Free-text search query.
schema:
type: string
minLength: 2
maxLength: 200
- name: ein
in: query
required: false
description: EIN.
schema:
type: string
minLength: 9
maxLength: 11
pattern: ^\d{2}-?\d{7}$
- name: state
in: query
required: false
description: US state — two-letter postal abbreviation (e.g. CA) or full name.
schema:
type: string
minLength: 2
maxLength: 2
pattern: ^[A-Za-z]{2}$
- name: nteeCode
in: query
required: false
description: Ntee code.
schema:
type: string
pattern: ^[A-Za-z][0-9]{1,3}$
- name: subsectionCode
in: query
required: false
description: Subsection code.
schema:
type: integer
minimum: 2
maximum: 92
- name: page
in: query
required: false
description: Page number (1-based) for paginated results.
schema:
type: integer
minimum: 0
maximum: 99
default: 0
- $ref: '#/components/parameters/TrialMode'
components:
schemas:
Source:
type: object
description: 'Provenance of the data: upstream provider, source URL, and license.'
properties:
provider:
type: string
description: Upstream data provider.
url:
type: string
description: Source URL or documentation link.
license:
type: string
description: License / usage terms for the data.
CallMeta:
type: object
description: Per-call meta envelope — endpoint id, cost, caller kind, settlement details.
X402PaymentRequiredV2:
type: object
description: x402 v2 PaymentRequired envelope. Pick any entry from accepts[], sign for that rail, retry with the PAYMENT-SIGNATURE header.
required:
- x402Version
- accepts
properties:
x402Version:
type: integer
const: 2
error:
type: string
description: Human-readable reason payment is required.
resource:
type: string
description: The resource URL being purchased.
accepts:
type: array
description: Payment requirement options, one per supported network (Base USDC, Solana USDC).
items:
type: object
required:
- scheme
- network
- amount
- asset
- payTo
- maxTimeoutSeconds
properties:
scheme:
type: string
enum:
- exact
network:
type: string
description: CAIP-2 network id, e.g. "eip155:8453" (Base) or "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp".
amount:
type: string
description: Price in atomic asset units (USDC has 6 decimals).
asset:
type: string
description: Asset contract address / mint.
payTo:
type: string
description: Treasury address to pay.
maxTimeoutSeconds:
type: integer
extra:
type: object
description: 'Rail-specific extras (EVM: EIP-712 domain name/version; Solana: feePayer).'
additionalProperties: true
extensions:
type: object
description: Optional discovery metadata (e.g. bazaar input/output schemas).
additionalProperties: true
responses:
PaymentRequired:
description: Payment required. Body contains the x402 PaymentRequirements envelope with a multi-network accepts array; the per-call price is in accepts[].amount (and on the operation as x-2s-price). Sign for whichever rail you hold USDC on (EIP-3009 for Base, partial SPL transfer for Solana) and retry with the PAYMENT-SIGNATURE header (X-PAYMENT also accepted for v1 clients).
content:
application/json:
schema:
$ref: '#/components/schemas/X402PaymentRequiredV2'
UpstreamError:
description: Upstream provider error.
MethodNotAllowed:
description: Method not allowed — see `Allow` header for the supported method.
ServerError:
description: Internal server error.
BadRequest:
description: Bad request — invalid parameters.
parameters:
TrialMode:
name: trial
in: query
required: false
description: 'Try before you buy. Set to 1 for one free real call per endpoint per hour — no wallet or payment needed — to verify the endpoint before paying. Equivalent to sending the "X-2s-Trial: 1" request header. Works on every endpoint.'
schema:
type: integer
enum:
- 1
securitySchemes:
x402Payment:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: 'x402 protocol v2: base64-encoded PaymentPayload. Call any paid endpoint without auth to receive a 402 with a multi-network PaymentRequirements envelope. Sign for either rail: EIP-3009 transferWithAuthorization (Base USDC) OR a partial SPL token transfer (Solana USDC). Retry with PAYMENT-SIGNATURE header. X-PAYMENT is also accepted for v1 buyer clients. See https://x402.org.'