openapi: 3.2.0
info:
  title: Cheniere LNG Connection — Pipeline Informational Postings…
  version: '2026-09-06'
  summary: The JSON API behind Cheniere's LNG Connection informational-postings site for its FERC-regulated interstate natural gas pipelines.
  description: Cheniere Energy publishes the FERC-mandated informational postings for its interstate natural gas pipelines — Cheniere Creole Trail Pipeline, L.P.
  contact:
    name: Cheniere Pipeline Operations
    url: https://www.cheniere.com/about/where-we-work/creole-trail-pipeline
  x-derived-by: API Evangelist enrichment pipeline (local-v3)
  x-generated-from: provider client bundle string literals + live anonymous response probes
  x-not-published-by-provider: true
servers:
- url: https://lngconnectionapi.cheniere.com
  description: Production. Referenced as the prod baseUrl in the provider's own client bundle.
security: []
tags:
- name: Capacity
  description: Operationally available and unsubscribed capacity postings by nomination cycle.
paths:
  /api/Capacity/GetCycles:
    get:
      operationId: getCycles
      summary: List NAESB nomination cycles
      tags:
      - Capacity
      parameters: []
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Cycle'
        '404':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      description: The five NAESB WGQ nomination cycles used as the cycleId argument to getOperationallyAvailableCapacity.
      x-probed:
        url: https://lngconnectionapi.cheniere.com/api/Capacity/GetCycles
        status: 200
        date: '2026-09-06'
  /api/Capacity/GetLocations:
    get:
      operationId: getCapacityLocations
      summary: List capacity posting locations for a date range
      tags:
      - Capacity
      parameters:
      - name: tspNo
        in: query
        required: true
        schema:
          type: integer
        description: 'Transportation service provider (company) id. Observed values: 200 = Cheniere Creole Trail Pipeline, L.P. (DUNS 800742780, FERC CID C001506); 400 = Cheniere Corpus Christi Pipeline, L.P. (DUNS 079841991). 600 and 800 route in the client but returned no rows when probed.'
      - name: beginDate
        in: query
        required: true
        schema:
          type: string
        description: Begin gas day. Accepted as YYYY-MM-DD or M/D/YYYY.
      - name: endDate
        in: query
        required: true
        schema:
          type: string
        description: End gas day. Accepted as YYYY-MM-DD or M/D/YYYY.
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Location'
        '404':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-probed:
        url: https://lngconnectionapi.cheniere.com/api/Capacity/GetLocations?tspNo=200&beginDate=2026-09-01&endDate=2026-09-05
        status: 200
        date: '2026-09-06'
  /api/Capacity/GetCapacity:
    get:
      operationId: getOperationallyAvailableCapacity
      summary: Operationally available capacity for a gas day, cycle and location
      tags:
      - Capacity
      description: FERC 18 CFR 284.13(d) / NAESB WGQ operationally available capacity posting. Envelope carries `report` and `beginDate` only.
      parameters:
      - name: tspNo
        in: query
        required: true
        schema:
          type: integer
        description: 'Transportation service provider (company) id. Observed values: 200 = Cheniere Creole Trail Pipeline, L.P. (DUNS 800742780, FERC CID C001506); 400 = Cheniere Corpus Christi Pipeline, L.P. (DUNS 079841991). 600 and 800 route in the client but returned no rows when probed.'
      - name: beginDate
        in: query
        required: true
        schema:
          type: string
        description: Begin gas day. Accepted as YYYY-MM-DD or M/D/YYYY.
      - name: cycleId
        in: query
        required: true
        schema:
          type: integer
        description: Nomination cycle id from getCycles.
      - name: locationId
        in: query
        required: true
        schema:
          type: string
        description: Location id from getCapacityLocations.
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/ReportEnvelope'
                - type: object
                  properties:
                    report:
                      type: array
                      items:
                        $ref: '#/components/schemas/OperationallyAvailableCapacity'
        '404':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-probed:
        url: https://lngconnectionapi.cheniere.com/api/Capacity/GetCapacity?tspNo=200&beginDate=2026-09-05&cycleId=1&locationId=CT109413
        status: 200
        date: '2026-09-06'
  /api/Capacity/GetUnsubscribed:
    get:
      operationId: getUnsubscribedCapacity
      summary: Unsubscribed firm capacity for a gas day
      tags:
      - Capacity
      parameters:
      - name: tspNo
        in: query
        required: true
        schema:
          type: integer
        description: 'Transportation service provider (company) id. Observed values: 200 = Cheniere Creole Trail Pipeline, L.P. (DUNS 800742780, FERC CID C001506); 400 = Cheniere Corpus Christi Pipeline, L.P. (DUNS 079841991). 600 and 800 route in the client but returned no rows when probed.'
      - name: beginDate
        in: query
        required: true
        schema:
          type: string
        description: Begin gas day. Accepted as YYYY-MM-DD or M/D/YYYY.
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/UnsubscribedCapacity'
        '404':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: 'Error. ASP.NET Web API envelope: {"message": "..."}.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-probed:
        url: https://lngconnectionapi.cheniere.com/api/Capacity/GetUnsubscribed?tspNo=200&beginDate=2026-09-01
        status: 200
        date: '2026-09-06'
components:
  schemas:
    UnsubscribedCapacity:
      type: object
      description: Unsubscribed firm capacity posting for one location and gas day.
      properties:
        tsP_NO:
          type: integer
        dunS_NUM:
          type: string
        legaL_NAME:
          type: string
        loC_ID:
          type: string
        loC_NM:
          type: string
        poV_CD:
          type: string
        efF_DT_FROM:
          type: string
          format: date-time
        efF_DT_TO:
          type: string
          format: date-time
        posT_DATE:
          type: string
        loC_PURP:
          type: string
        loC_QTI:
          type: string
        meaS_BASIS:
          type: string
        meaS_BASIS_DESC:
          type: string
        loC_CAP:
          type: number
        comments:
          type:
          - string
          - 'null'
    Cycle:
      type: object
      description: A NAESB WGQ nomination cycle (Timely, Evening, Intraday 1/2/3).
      properties:
        cyclE_ID:
          type: integer
        cyclE_TYPE_DESCR:
          type: string
    Location:
      type: object
      description: A capacity posting location (receipt/delivery point).
      properties:
        loC_ID:
          type: string
        loC_NM:
          type: string
    ReportEnvelope:
      type: object
      description: Common envelope returned by the dated report endpoints. `report` carries the rows; `beginDate`/`endDate` echo the requested gas-day range in M/D/YYYY.
      properties:
        report:
          type: array
          items:
            type: object
        beginDate:
          type: string
          description: Echo of the requested begin gas day, M/D/YYYY.
        endDate:
          type: string
          description: Echo of the requested end gas day, M/D/YYYY.
    Error:
      type: object
      description: 'ASP.NET Web API error envelope. Not RFC 9457 problem+json: a single `message` string, no `type`, `title` or `status` member.'
      properties:
        message:
          type: string
      required:
      - message
    OperationallyAvailableCapacity:
      type: object
      description: Operationally available / unscheduled capacity posting for one location and nomination cycle (NAESB WGQ 5.3.x, FERC 18 CFR 284.13(d)).
      properties:
        tsp:
          type: string
        tsP_NAME:
          type: string
        cycle:
          type: string
        postinG_DT_TIME:
          type: string
        avaiL_CAP_EFF_DT_TIME:
          type: string
          format: date-time
        avaiL_CAP_END_DT:
          type: string
          format: date-time
        caP_TYPE_DESC:
          type: string
        loc:
          type: string
        loC_NAME:
          type: string
        loC_PURP_DESC:
          type: string
        loC_QTI:
          type: string
        meaS_BASIS:
          type: string
        it:
          type: string
        alL_QTY_AVAIL:
          type: string
        desigN_OPER_CAP:
          type: number
        opeR_CAP:
          type: number
        scheD_QTY:
          type: number
        qtY_AVAIL:
          type: number
        floW_IND:
          type: string
        row_Number:
          type: string
externalDocs:
  description: LNG Connection informational postings site
  url: https://lngconnection.cheniere.com/