Southwest Gas website screenshot

Southwest Gas

Southwest Gas Holdings is a natural gas distribution company that purchases, distributes, and transports natural gas for customers in Arizona, Nevada, and California. As a Fortune 1000 utility company headquartered in Las Vegas, Nevada, Southwest Gas serves over 2 million customers through its regulated utility segment and also operates Centuri Group, a full-service utility infrastructure services company.

Southwest Gas publishes 2 APIs on the APIs.io network. Tagged areas include Fortune 1000, Natural Gas, Utility, and Energy.

The Southwest Gas catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

🌐 Visit website 📡 Source on GitHub
28.7/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessEnterprise
2 APIs
Fortune 1000Natural GasUtilityEnergy

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 28.7/100 · thin
Contract Quality 8.5 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 2.7 / 13
Governance 8.3 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/southwest-gas: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Southwest Gas My Account API

The Southwest Gas My Account API powers the online customer portal and mobile application for natural gas utility customers in Arizona, Nevada, and California. Customers can vie...

Southwest Gas Agency Portal API

The Southwest Gas Agency Portal provides access for charitable organizations and assistance agencies to look up customer accounts and submit utility assistance pledges on behalf...

Pricing Plans 1

Published pricing tiers and plan structures.

Southwest Gas Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Southwest Gas Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Southwest Gas Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Southwest Gas Context

8 classes · 13 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Southwest Gas API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Southwest Gas Customer Account

12 properties

JSON SCHEMA

Southwest Gas Usage Record

11 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Southwest Gas Account Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Southwest Gas Account Example

12 fields

EXAMPLE

Southwest Gas Usage Example

11 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Southwest Gas Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Press 5

Recent news and press coverage referencing this provider.

Southwest Gas Holdings, Inc. Reports First Quarter 2026 ...

2026-05-25

Southwest Gas Holdings Announces Decision to Separate ...

2026-05-25

Southwest Gas Gets Upgrade Ahead of Strong 2026 Earnings

2026-05-25

XBRL Viewer

2026-05-25

2024 Sustainability Report

2026-05-25

Resources

Get Started 2

Portal, sign-up, and the first successful call

Customer Portal
Customer Portal
 Agency Portal
Agency Portal

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLDContext
JSONLDContext
 Vocabulary
Vocabulary

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 3

The organization behind the API

Website
Website
 Investor Relations
Investor Relations
 LinkedIn
LinkedIn

Other 2

Properties that don't map to a standard resource type

Mobile App
Mobile App
 X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: southwest-gas
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Enterprise
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/southwest-gas.png
name: Southwest Gas
description: Southwest Gas Holdings is a natural gas distribution company that purchases, distributes, and transports natural
  gas for customers in Arizona, Nevada, and California. As a Fortune 1000 utility company headquartered in Las Vegas, Nevada,
  Southwest Gas serves over 2 million customers through its regulated utility segment and also operates Centuri Group, a full-service
  utility infrastructure services company.
url: https://raw.githubusercontent.com/api-evangelist/southwest-gas/refs/heads/main/apis.yml
created: '2026-03-24'
modified: '2026-05-02'
specificationVersion: '0.19'
tags:
- Fortune 1000
- Natural Gas
- Utility
- Energy
apis:
- aid: southwest-gas:southwest-gas-my-account-api
  name: Southwest Gas My Account API
  description: The Southwest Gas My Account API powers the online customer portal and mobile application for natural gas utility
    customers in Arizona, Nevada, and California. Customers can view usage history, pay bills, manage account settings, and
    receive outage notifications through the portal.
  humanURL: https://myaccount.swgas.com/
  baseURL: https://myaccount.swgas.com
  tags:
  - Natural Gas
  - Customer Account
  - Utility
  - Billing
  properties:
  - type: Website
    url: https://myaccount.swgas.com/Portal/
  - type: Mobile Application
    url: https://www.swgas.com/en/mobile-app
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/southwest-gas/refs/heads/main/json-schema/southwest-gas-account-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/southwest-gas/refs/heads/main/json-schema/southwest-gas-usage-schema.json
- aid: southwest-gas:southwest-gas-agency-portal-api
  name: Southwest Gas Agency Portal API
  description: The Southwest Gas Agency Portal provides access for charitable organizations and assistance agencies to look
    up customer accounts and submit utility assistance pledges on behalf of customers in need.
  humanURL: https://agency.swgas.com/Portal/
  baseURL: https://agency.swgas.com
  tags:
  - Natural Gas
  - Agency
  - Assistance
  - Utility
  properties:
  - type: Website
    url: https://agency.swgas.com/Portal/
  - type: FAQ
    url: https://h1www.swgas.com/en/agency-portal-faqs
common:
- type: DomainSecurity
  url: security/southwest-gas-domain-security.yml
- type: Website
  url: https://www.swgas.com
- type: Customer Portal
  url: https://myaccount.swgas.com/
- type: Agency Portal
  url: https://agency.swgas.com/Portal/
- type: Mobile App
  url: https://www.swgas.com/en/mobile-app
- type: Investor Relations
  url: https://investors.swgasholdings.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/southwest-gas
- type: X
  url: https://twitter.com/SouthwestGas
- type: JSONLDContext
  url: https://raw.githubusercontent.com/api-evangelist/southwest-gas/refs/heads/main/json-ld/southwest-gas-context.jsonld
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/southwest-gas/refs/heads/main/vocabulary/southwest-gas-vocabulary.yml
maintainers:
- FN: API Evangelist
  email: info@apievangelist.com