Xcel Energy LocalTimeParameters API

openapi: 3.2.0
info:
  title: Xcel Energy Green Button Connect My Data ApplicationInformation Local Time Parameters API
  summary: OAuth 2.0 authorized customer energy usage data based on the NAESB ESPI standard.
  description: 'Xcel Energy Green Button Connect My Data API based on the ESPI (Energy Services Provider Interface) standard developed by NAESB. Enables authorized third-party applications to access customer electricity and natural gas usage data captured by Xcel Energy smart meters. Resources are exposed as Atom feeds and entries containing UsagePoint, MeterReading, IntervalBlock, ReadingType, ElectricPowerUsageSummary, ElectricPowerQualitySummary, LocalTimeParameters, and customer information. Customer authorization is granted via OAuth 2.0 and follows the Green Button Connect specification used by utilities across North America.

    '
  version: 1.1.0
  contact:
    name: Xcel Energy Developer Portal
    url: https://developer-apim.aws.xcelenergy.com/
  license:
    name: Proprietary
    url: https://www.xcelenergy.com/privacy_policy
  x-generated-from: documentation
  x-last-validated: '2026-05-03'
  x-standards:
  - NAESB ESPI 1.1
  - Green Button Connect My Data
servers:
- url: https://api.xcelenergy.com/DataCustodian/espi/1_1/resource
  description: Xcel Energy Data Custodian (Production)
- url: https://developer-apim.aws.xcelenergy.com/DataCustodian/espi/1_1/resource
  description: Xcel Energy Developer Sandbox
tags:
- name: LocalTimeParameters
  description: Time zone and daylight-savings-time parameters used to interpret interval timestamps.
paths:
  /LocalTimeParameters/{localTimeParametersId}:
    get:
      operationId: getLocalTimeParameters
      summary: Retrieve LocalTimeParameters
      description: 'Returns the LocalTimeParameters entry describing the time zone and daylight-savings-time rules used to interpret meter timestamps.

        '
      tags:
      - LocalTimeParameters
      security:
      - accessToken: []
      parameters:
      - $ref: '#/components/parameters/LocalTimeParametersId'
      responses:
        '200':
          description: Atom entry containing the LocalTimeParameters resource.
          content:
            application/atom+xml:
              schema:
                $ref: '#/components/schemas/LocalTimeParameters'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  responses:
    NotFound:
      description: The requested resource was not found or is not authorized for this token.
    Unauthorized:
      description: Authentication failed or the access token is invalid or expired.
  parameters:
    LocalTimeParametersId:
      name: localTimeParametersId
      in: path
      required: true
      description: Identifier of a LocalTimeParameters resource.
      schema:
        type: string
        example: '1'
  schemas:
    LocalTimeParameters:
      allOf:
      - $ref: '#/components/schemas/AtomEntry'
      - type: object
        description: Time zone and daylight-savings-time parameters used to interpret meter timestamps.
        properties:
          dstEndRule:
            type: string
            description: Hex-encoded DST end rule.
          dstOffset:
            type: integer
            description: DST offset from local standard time in seconds.
          dstStartRule:
            type: string
            description: Hex-encoded DST start rule.
          tzOffset:
            type: integer
            description: Local time zone offset from UTC in seconds.
    AtomEntry:
      type: object
      description: Atom entry envelope used to wrap ESPI resource payloads.
      properties:
        id:
          type: string
          description: Stable URI for the entry.
        title:
          type: string
          description: Human-readable title of the entry.
        published:
          type: string
          format: date-time
          description: Time the entry was first published.
        updated:
          type: string
          format: date-time
          description: Time the entry was last updated.
        link:
          type: array
          description: Atom link relations (self, up, related).
          items:
            type: object
            properties:
              rel:
                type: string
                example: self
              href:
                type: string
                example: UsagePoint/1
        content:
          type: object
          description: ESPI XML payload content.
  securitySchemes:
    accessToken:
      type: oauth2
      description: Customer-scoped access token issued via the OAuth 2.0 authorization-code grant.
      flows:
        authorizationCode:
          authorizationUrl: https://api.xcelenergy.com/DataCustodian/oauth/authorize
          tokenUrl: https://api.xcelenergy.com/DataCustodian/oauth/token
          refreshUrl: https://api.xcelenergy.com/DataCustodian/oauth/token
          scopes:
            FB=4_5_15;IntervalDuration=900;BlockDuration=monthly;HistoryLength=34128000: Standard ESPI scope string for 15-minute electric usage data with 13 months of history.
    clientAccessToken:
      type: oauth2
      description: Application-scoped client access token used for management endpoints (Authorization list, Bulk, ServiceStatus).
      flows:
        clientCredentials:
          tokenUrl: https://api.xcelenergy.com/DataCustodian/oauth/token
          scopes:
            DataCustodian_Admin_Access: Administrative scope used for application-level operations.
    registrationAccessToken:
      type: http
      scheme: bearer
      bearerFormat: Registration Access Token
      description: Token issued at application registration; used to read or update ApplicationInformation.