Lloyd's Catastrophe Codes API v1

aid: lloyds-of-london:lloyds-catastrophe-codes-api
name: Lloyd's Catastrophe Codes API v1
description: 'Lloyd''s catastrophe event reference data served from the London Market API Gateway — the
  market''s canonical codes for aggregating losses to a named catastrophe (e.g. 17E "Typhoon Hato, 20
  August 2017 and ongoing, affecting Hong Kong, Macau and South China"), each carrying Code, Definition,
  EventStartDate, EventEndDate and EventYear. This API was never listed in the Lloyd''s API catalogue;
  it surfaced because the Lloyd''s Base API Standard uses it for every worked example of the identity
  pseudo-field and the collection wrapper document. It is the only Lloyd''s API surface still routed on
  the gateway: probed on 2026-07-25 the unauthenticated /health meta resource mandated by section 5.11
  of the Base API Standard returns 200 on both Production and Sandbox, while /CatastropheCodes and /version
  return 401 {"Code":401,"Message":"Client certificate is missing."} — the mutual-TLS gate is live and
  enforcing. Access requires LIMOSS Common Services onboarding, an Azure AD on-behalf-of token with scp=user_impersonation,
  and a registered X.509 certificate per environment. No specification is published.'
humanURL: https://web.archive.org/web/20200930095802/https://developer.lloyds.com/Get-Started/Base-API-Standard
baseURL: https://api.londonmarketgroup.co.uk/Lloyds/CatastropheCodes/v1
tags:
- Catastrophe
- Reference Data
- London Market
- Reinsurance
properties:
- type: Documentation
  url: https://web.archive.org/web/20200930095802/https://developer.lloyds.com/Get-Started/Base-API-Standard
  name: Lloyd's Base API Standard
  description: The normative standard this endpoint implements, and the source of its published payload
    examples.
- type: Examples
  url: examples/_index.yml
- type: Sandbox
  url: sandbox/lloyds-of-london-sandbox.yml
  name: Sandbox environment
  description: https://sand-api.londonmarketgroup.co.uk/Lloyds/CatastropheCodes/v1 — live, /health returns
    200; access is partner-gated via LIMOSS.
- type: Authentication
  url: authentication/lloyds-of-london-authentication.yml
- type: WellKnown
  url: https://api.londonmarketgroup.co.uk/discovery/.well-known/openid-configuration
  name: OpenID Connect discovery
  description: Live OIDC discovery document mandated by section 5.12.2 of the Lloyd's Base API Standard;
    references the gateway JWKS at /discovery/keys.