> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vintl.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Revision history for one observation

> Returns all vintages (revisions) of a single observation date, ordered by publication date ascending.
Shows how an economic data point was revised over time from initial release through annual revisions.




## OpenAPI

````yaml /openapi/v1.yaml get /v1/series/{id}/revisions
openapi: 3.1.0
info:
  title: Vintl API
  version: 1.0.0
  description: >
    Point-in-time macro-economic and treasury data API.


    The killer feature: `?as_of=DATE` returns what economic data was known at
    any historical date.

    Requires Pro plan or higher — free plan returns latest data only.
  contact:
    name: Vintl Support
    url: https://vintl.io
  license:
    name: Proprietary
servers:
  - url: https://api.vintl.io
    description: Production
  - url: http://localhost:8080
    description: Local development
security:
  - ApiKeyAuth: []
tags:
  - name: Health
    description: Liveness and readiness probes
  - name: Auth
    description: API key validation and plan info
  - name: Treasury
    description: U.S. Treasury yield curve data (1990-present, never revised)
  - name: Macro
    description: Economic indicators with point-in-time vintage tracking
  - name: Series
    description: Series discovery and metadata
  - name: Insider
    description: SEC Form 4 insider trading data with cluster detection
paths:
  /v1/series/{id}/revisions:
    get:
      tags:
        - Macro
      summary: Revision history for one observation
      description: >
        Returns all vintages (revisions) of a single observation date, ordered
        by publication date ascending.

        Shows how an economic data point was revised over time from initial
        release through annual revisions.
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
          example: GDPC1
        - name: date
          in: query
          required: true
          schema:
            type: string
            format: date
          description: The observation date to get revisions for
          example: '2023-07-01'
      responses:
        '200':
          description: All revisions ordered by as_of_date ascending
          content:
            application/json:
              schema:
                type: object
                properties:
                  object:
                    type: string
                    example: revision_series
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Observation'
              example:
                object: revision_series
                request_id: req_...
                status: ok
                results:
                  - date: '2023-07-01T00:00:00Z'
                    as_of_date: '2023-10-26T00:00:00Z'
                    value: '22491.567'
                    series_id: GDPC1
                  - date: '2023-07-01T00:00:00Z'
                    as_of_date: '2023-11-29T00:00:00Z'
                    value: '22506.365'
                    series_id: GDPC1
                  - date: '2023-07-01T00:00:00Z'
                    as_of_date: '2023-12-21T00:00:00Z'
                    value: '22490.692'
                    series_id: GDPC1
                  - date: '2023-07-01T00:00:00Z'
                    as_of_date: '2024-09-26T00:00:00Z'
                    value: '22780.933'
                    series_id: GDPC1
                  - date: '2023-07-01T00:00:00Z'
                    as_of_date: '2025-09-25T00:00:00Z'
                    value: '22840.989'
                    series_id: GDPC1
                results_count: 5
                has_more: false
        '400':
          description: Missing or invalid date parameter
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    Observation:
      type: object
      properties:
        date:
          type: string
          format: date-time
          example: '2023-07-01T00:00:00Z'
        value:
          type: string
          description: Decimal value as string (never float)
          example: '22491.567'
        as_of_date:
          type: string
          format: date-time
          description: The vintage date — when this value was published
          example: '2023-10-26T00:00:00Z'
        series_id:
          type: string
          example: GDPC1
        unit:
          type: string
          example: lin
        frequency:
          type: string
          example: Q
        source:
          type: string
          example: FRED
    Problem:
      type: object
      description: RFC 9457 Problem Details (Content-Type application/problem+json)
      properties:
        type:
          type: string
          format: uri
          example: https://macrodata.dev/errors/not-found
        title:
          type: string
          example: Not Found
        status:
          type: integer
          example: 404
        detail:
          type: string
          example: series 'INVALID' not found
        instance:
          type: string
          example: /v1/series/INVALID
        request_id:
          type: string
          example: req_19d40c11691b60ece4cc73351271260
        field:
          type: string
          description: Which field caused the error (on validation errors)
  responses:
    Unauthorized:
      description: Missing or invalid API key
      content:
        application/problem+json:
          schema:
            $ref: '#/components/schemas/Problem'
          example:
            type: https://macrodata.dev/errors/unauthorized
            title: Unauthorized
            status: 401
            detail: API key is required. Set the X-API-Key header.
            instance: /v1/ping
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key prefixed with `mda_live_sk_`

````