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OpenAPI Specification

openapi: 3.2.0
info:
  title: Arc & Ledger Tax Data Vintages API
  version: 1.0.3
  description: 'Authority-cited U.S. tax data: annual federal tax parameters, IRC 7503-rolled filing deadlines, the IRC 6621 quarterly interest-rate table, and reference profiles for IRS notices and tax documents. Every value carries its authority citation, official URL, and tax-year vintage. General information, not tax or legal advice for any taxpayer. Free tier: no key, 30 requests/minute per IP. Docs: https://www.arcandledger.com/developers/'
  contact:
    name: Arc & Ledger Accounting
    url: https://www.arcandledger.com/developers/
servers:
- url: https://api.arcandledger.com
tags:
- name: Vintages
paths:
  /v1/vintages:
    get:
      summary: Available vintages and coverage
      responses:
        '200':
          description: Vintage registry and interest-rate verification date
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Envelope'
      tags:
      - Vintages
      operationId: getV1Vintages
      x-operation-id-source: derived
components:
  schemas:
    Envelope:
      type: object
      required:
      - data
      - meta
      - disclaimer
      properties:
        data:
          type: object
        meta:
          type: object
          required:
          - serverVersion
          properties:
            serverVersion:
              type: string
            taxYear:
              type: integer
        disclaimer:
          type: string
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: X-Api-Key