Plinth US Grants Data

Plinth US Grants Data Grants API

The funder-grantee graph: grants, funders, recipients and aggregates.

GitHub OpenAPI

Operations 4

GET /api/grants/transactions List individual grants #
GET /api/grants/funders Rank funders by giving #
GET /api/grants/recipients Rank recipients by what they received #
GET /api/grants/summary Aggregate totals for a filter #

Documentation

📖
Documentation
https://data.useplinth.com/developers
📖
RateLimits
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/rate-limits/plinth-us-grants-data-rate-limits.yml

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/openapi/plinth-us-grants-data-grants-api-openapi.yml

Other Resources

🔗
LLMsTxt
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/llms/plinth-us-grants-data-llms.txt
🔗
LLMsTxt
https://data.useplinth.com/llms.txt
🔗
ToolCrosswalk
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/mcp/plinth-us-grants-data-tool-crosswalk.yml
🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/errors/plinth-us-grants-data-problem-types.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/data-model/plinth-us-grants-data-data-model.yml
🔗
Conventions
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/conventions/plinth-us-grants-data-conventions.yml
🔗
SpectralRules
https://raw.githubusercontent.com/api-evangelist/plinth-us-grants-data/refs/heads/main/rules/plinth-us-grants-data-spectral.yaml
🔗
SpectralRules
https://data.useplinth.com/spectral/grants-api.yaml

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OpenAPI Specification

plinth-us-grants-data-grants-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Plinth Grants 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: Grants
  description: 'The funder-grantee graph: grants, funders, recipients and aggregates.'
paths:
  /api/grants/transactions:
    get:
      summary: List individual grants
      operationId: listGrants
      parameters:
      - name: funder_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Funder Id
      - name: recip_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Recip Id
      - name: year
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Year
      - name: subject
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Subject
      - name: location
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Location
      - name: min_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Min Amt
      - name: max_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Max Amt
      - name: page
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Page
      - name: limit
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Limit
      - name: sort_by
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Sort By
      - name: sort_order
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Sort Order
      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:
      - Grants
      description: 'Individual grant rows — funder, recipient, amount, fiscal year, cause and the purpose text as filed. The graph traverses both ways: `funder_id` for everything a foundation funded, `recip_id` for every funder behind a nonprofit.'
  /api/grants/funders:
    get:
      summary: Rank funders by giving
      operationId: listFunders
      parameters:
      - name: funder_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Funder Id
      - name: recip_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Recip Id
      - name: year
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Year
      - name: subject
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Subject
      - name: location
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Location
      - name: min_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Min Amt
      - name: max_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Max Amt
      - name: page
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Page
      - name: limit
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Limit
      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:
      - Grants
      description: 'Funders matching the filter, ranked by total dollars: amount, grant count, distinct recipients reached, and the first and last fiscal years they were active.'
  /api/grants/recipients:
    get:
      summary: Rank recipients by what they received
      operationId: listRecipients
      parameters:
      - name: funder_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Funder Id
      - name: recip_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Recip Id
      - name: year
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Year
      - name: subject
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Subject
      - name: location
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Location
      - name: min_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Min Amt
      - name: max_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Max Amt
      - name: page
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Page
      - name: limit
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Limit
      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:
      - Grants
      description: Recipient organizations matching the filter, ranked by dollars received, with location and how many distinct funders backed them.
  /api/grants/summary:
    get:
      summary: Aggregate totals for a filter
      operationId: getGrantsSummary
      parameters:
      - name: funder_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Funder Id
      - name: recip_id
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Recip Id
      - name: year
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Year
      - name: subject
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Subject
      - name: location
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Location
      - name: min_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Min Amt
      - name: max_amt
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Max Amt
      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:
      - Grants
      description: 'One call for the whole shape of a filter: total dollars, grant count, distinct funders and recipients, plus a year-by-year breakdown. Cheaper than paging the rows to count them.'
components:
  responses:
    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
    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
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    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
    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
  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