openapi: 3.0.1
info:
  title: US Senate Lobbying Disclosure Act (LDA) Clients Contributions API
  description: The Senate Lobbying Disclosure Act (LDA) REST API provides public access to lobbying filings, registrations, quarterly activity reports (LD-2), and semi-annual contribution reports (LD-203). An optional API key increases the rate limit from 15 to 120 requests per minute.
  version: '1.0'
  contact:
    name: Senate Office of Public Records
    email: lobby@sec.senate.gov
    url: https://lda.senate.gov/api/
servers:
- url: https://lda.senate.gov/api/v1
security:
- ApiKeyAuth: []
- {}
tags:
- name: Contributions
  description: Semi-annual campaign contribution reports (LD-203)
paths:
  /contributions/:
    get:
      tags:
      - Contributions
      operationId: listContributions
      summary: List Contribution Reports (LD-203)
      description: Returns a paginated list of semi-annual campaign contribution reports.
      parameters:
      - name: registrant_name
        in: query
        description: Filter by registrant name
        schema:
          type: string
      - name: filing_year
        in: query
        schema:
          type: integer
      - name: filing_period
        in: query
        schema:
          type: string
      - name: page
        in: query
        schema:
          type: integer
          default: 1
      - name: format
        in: query
        schema:
          type: string
          enum:
          - json
          default: json
      responses:
        '200':
          description: Paginated list of contribution reports
          content:
            application/json:
              schema:
                type: object
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: 'Token-based auth. Format: ''Token YOUR_API_KEY'''