---
title: "ParameterHistoryItem"
url: "https://developers.zinnia.com/apis/rate-configuration/versions/09cd2eb7-6cba-4d5f-b142-73e01c2ad670/schemas/ParameterHistoryItem"
---

> Full API specification: https://developers.zinnia.com/apis/rate-configuration/versions/09cd2eb7-6cba-4d5f-b142-73e01c2ad670.md

# ParameterHistoryItem

One historical value change for a parameter, mirroring a ParamHistory.Bin record.

## OpenAPI definition

```yaml
openapi: 3.1.0
info:
  title: Rate Configuration
  version: 1.0.0
servers:
  - url: https://dev.api.zinnia.io
    description: Development
components:
  schemas:
    ParameterHistoryItem:
      required:
        - effectiveDay
        - effectiveMonth
        - effectiveYear
        - parameterId
        - value
      type: object
      properties:
        parameterId:
          type: string
        effectiveYear:
          type: integer
          format: int32
        effectiveMonth:
          type: integer
          format: int32
        effectiveDay:
          type: integer
          format: int32
        value:
          type: number
          format: double
      additionalProperties: false
      description: One historical value change for a parameter, mirroring a
        ParamHistory.Bin record.
```