generated: '2026-09-05'
method: probed
source: https://developer.esl.caseys.io/ Getting Started section + live probes of the UAT environment
  (2026-09-05)
published: true
summary: Casey's runs a full UAT mirror of the API estate. The developer portal's Getting Started steps
  end with "Use the UAT endpoint to test out your API."
environments:
- name: production
  gateway: https://esl.caseys.io
  portal: https://developer.esl.caseys.io/
  apis: 21
  status: live
- name: uat
  gateway: https://uat.esl.caseys.io
  portal: https://developer-uat.esl.caseys.io/
  apis: 20
  status: live
  method: probed
  evidence: https://developer-uat.esl.caseys.io/ returned HTTP 200 with the same Casey's developer portal,
    and its anonymous catalogue (/mapi/apis?api-version=2022-08-01) lists 20 of the 21 production APIs
    (FuelPriceApi is absent from UAT). https://uat.esl.caseys.io/ returns the APIM gateway 404 envelope.
  note: The UAT gateway host is not named anywhere in the published docs that are readable anonymously
    — it was found by probing. Casey's should state it on the Getting Started page.
test_credentials:
  published: false
  note: No test key, sandbox key, magic identifier, fixture store number or seeded test data is published.
    A UAT subscription key must be requested through the portal like a production one.
test_data: []
time_simulation:
  supported: false
gotchas:
- The Getting Started page links its Postman collection to https://confluence.caseys.com/display/ESLT1/Postman.
  That hostname does not resolve on the public internet (NXDOMAIN, 2026-09-05) — the only "try it out"
  instruction on the portal points at an internal Confluence wiki an external integrator cannot reach.