openapi: 3.2.0
info:
  title: Plinth Grants Organizations API
  summary: US foundation and nonprofit funding data from public IRS Form 990 and 990-PF filings.
  description: 'A read API over the US grantmaking universe, read from public IRS Form 990, 990-EZ and 990-PF e-file filings.


    The funder-grantee graph traverses in BOTH directions: filter by `funder_id` for everything a foundation funded, or by `recip_id` for every funder behind a nonprofit.


    Start with `/api/search` to turn an organization name into an EIN and a canonical page URL — it needs no key. Every other endpoint requires one (free tier: 50 calls a month).


    Figures are read directly from named IRS filings. The IRS releases e-file data on a 12-24 month lag, so every figure is dated to its fiscal year rather than to today. Funding relationships are reported as association, never as causation. Organizations that do not e-file may be absent.'
  version: 1.0.0
  contact:
    name: Plinth
    url: https://data.useplinth.com/developers
  license:
    name: 'Source data: IRS public domain'
    url: https://www.irs.gov/charities-non-profits/tax-exempt-organization-search-bulk-data-downloads
  termsOfService: https://www.useplinth.com/terms
servers:
- url: https://data.useplinth.com
  description: Plinth US philanthropy data
security:
- ApiKeyAuth: []
tags:
- name: Organizations
  description: Per-organization profiles, financials and IRS compliance facets.
paths:
  /api/compliance/{ein}:
    get:
      summary: IRS status and sanctions screen for one organization
      operationId: getCompliance
      parameters:
      - name: ein
        in: path
        required: true
        schema:
          type: string
          title: Ein
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Organizations
      description: Exemption subsection, deductibility, foundation type, NTEE, IRS auto-revocation status and an OFAC (Treasury SDN) name screen. Refreshed monthly, so fresher than the 990 financials. The OFAC field is a triage signal — an entity NAME screen, not a sanctions determination.
  /api/essentials/{ein}:
    get:
      summary: Core profile for one organization
      operationId: getEssentials
      parameters:
      - name: ein
        in: path
        required: true
        schema:
          type: string
          title: Ein
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Organizations
      description: Name, location, NTEE classification and a financials summary from the latest filing we have parsed.
  /api/premier/{ein}:
    get:
      summary: Full profile for one organization
      operationId: getPremier
      parameters:
      - name: ein
        in: path
        required: true
        schema:
          type: string
          title: Ein
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Organizations
      description: Everything in essentials plus full financials and the resolved geographic service footprint.
components:
  responses:
    Unauthorized:
      description: No API key, or a key we do not recognize.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
          example:
            code: 401
            message: missing or invalid API key
    PaymentRequired:
      description: The monthly allowance is spent, the account is inactive, or the endpoint needs a paid plan. The message says which.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
          example:
            code: 402
            message: monthly API call allowance spent
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    ApiError:
      type: object
      description: Every failure answers with this envelope; `message` is safe to show a user.
      properties:
        code:
          type: integer
        message:
          type: string
      required:
      - code
      - message
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: Free key includes 50 calls a month; higher volume on a paid plan. Get one at https://data.useplinth.com/pricing.
externalDocs:
  description: Developer documentation
  url: https://data.useplinth.com/developers