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: Gas Quality
  description: Daily, comingled and mainline gas-quality analyses.
paths:
  /api/GasQuality/GetLocations:
    get:
      operationId: getGasQualityLocations
      summary: List locations with gas-quality postings
      tags:
      - Gas Quality
      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/GasQualityLocation'
        '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/GasQuality/GetLocations?tspNo=200&beginDate=2026-09-01&endDate=2026-09-05
        status: 200
        date: '2026-09-06'
  /api/GasQuality/GetGasQuality:
    get:
      operationId: getGasQuality
      summary: Daily gas quality for a location and date range
      tags:
      - Gas Quality
      description: null
      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.
      - name: locationId
        in: query
        required: true
        schema:
          type: string
        description: Location id from getGasQualityLocations.
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/ReportEnvelope'
                - type: object
                  properties:
                    report:
                      type: array
                      items:
                        $ref: '#/components/schemas/GasQualityReading'
        '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/GasQuality/GetGasQuality?tspNo=200&beginDate=2026-09-01&endDate=2026-09-05&locationId=CT109425
        status: 200
        date: '2026-09-06'
  /api/DailyComingled/GetDailyComingled:
    get:
      operationId: getDailyComingledGasQuality
      summary: Daily comingled system gas quality
      tags:
      - Gas Quality
      description: null
      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:
                allOf:
                - $ref: '#/components/schemas/ReportEnvelope'
                - type: object
                  properties:
                    report:
                      type: array
                      items:
                        $ref: '#/components/schemas/ComingledGasQuality'
        '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/DailyComingled/GetDailyComingled?tspNo=200&beginDate=2026-09-01&endDate=2026-09-05
        status: 200
        date: '2026-09-06'
  /api/Mainline/GetMainline:
    get:
      operationId: getMainlineGasQuality
      summary: Mainline gas-quality report
      tags:
      - Gas Quality
      description: Returns an empty `report` array for both probed TSPs; the endpoint is served but carried no rows on 2026-09-06.
      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:
                allOf:
                - $ref: '#/components/schemas/ReportEnvelope'
                - type: object
                  properties:
                    report:
                      type: array
                      items:
                        $ref: '#/components/schemas/GasQualityReading'
        '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/Mainline/GetMainline?tspNo=200&beginDate=2026-09-01&endDate=2026-09-05
        status: 200
        date: '2026-09-06'
components:
  schemas:
    ComingledGasQuality:
      type: object
      description: Daily comingled (system-wide) gas-quality analysis.
      properties:
        comingledId:
          type: integer
        gasDay:
          type: string
          format: date-time
        btu:
          type: number
        c1:
          type: number
        c2:
          type: number
        c3:
          type: number
        c4I:
          type: number
        c4N:
          type: number
        c5:
          type: number
        c6Plus:
          type: number
        cO2:
          type: number
        n2:
          type: number
        nC5:
          type: number
        companyId:
          type: integer
        frequency:
          type: string
    GasQualityLocation:
      type: object
      description: A location that carries a gas-quality posting.
      properties:
        tsP_NO:
          type: integer
        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
    GasQualityReading:
      type: object
      description: 'Daily gas-quality analysis for one location: heating value, Wobbe index and hydrocarbon/inert mole percentages.'
      properties:
        tsP_NO:
          type: integer
        legaL_NAME:
          type: string
        dunS_NO:
          type: string
        loC_ID:
          type: string
        loC_NM:
          type: string
        gaS_DAY:
          type: string
          format: date-time
        heatinG_VALUE:
          type: number
        n2_PCT:
          type: number
        c02_PCT:
          type: number
        c1_PCT:
          type: number
        c2_PCT:
          type: number
        c3_PCT:
          type: number
        iC4_PCT:
          type: number
        nC4_PCT:
          type: number
        iC5_PCT:
          type: number
        nC5_PCT:
          type: number
        c6PLUS_PCT:
          type: number
        wobbE_INDEX:
          type: number
externalDocs:
  description: LNG Connection informational postings site
  url: https://lngconnection.cheniere.com/