# Lloyd's Catastrophe Codes API v1

**Canonical:** https://apis.io/apis/lloyds-of-london/lloyds-catastrophe-codes-api/  
**Provider:** Lloyd's of London — https://apis.io/providers/lloyds-of-london/  
**Base URL:** https://api.londonmarketgroup.co.uk/Lloyds/CatastropheCodes/v1  
**Documentation:** https://web.archive.org/web/20200930095802/https://developer.lloyds.com/Get-Started/Base-API-Standard

Lloyd's Catastrophe Codes API v1 is one of 4 APIs that [Lloyd's of London](https://apis.io/providers/lloyds-of-london/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Catastrophe, Reference Data, London Market, and Reinsurance. The published artifact set on APIs.io includes API documentation and authentication docs.

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.

## Machine-readable artifacts (5)

- **Documentation** — https://web.archive.org/web/20200930095802/https://developer.lloyds.com/Get-Started/Base-API-Standard
- **Examples** — https://raw.githubusercontent.com/api-evangelist/lloyds-of-london/refs/heads/main/examples/_index.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/lloyds-of-london/refs/heads/main/sandbox/lloyds-of-london-sandbox.yml
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/lloyds-of-london/refs/heads/main/authentication/lloyds-of-london-authentication.yml
- **WellKnown** — https://api.londonmarketgroup.co.uk/discovery/.well-known/openid-configuration

## Other Lloyd's of London APIs (3)

- [Lloyd's Placing API - Submission and Quote v1](https://apis.io/apis/lloyds-of-london/lloyds-placing-api-submission-and-quote/)
- [Lloyd's Placing API - Firm Order](https://apis.io/apis/lloyds-of-london/lloyds-placing-api-firm-order/)
- [Lloyd's RPAC API (Risk, Premium and Claims)](https://apis.io/apis/lloyds-of-london/lloyds-rpac-api/)

## Tags

Catastrophe, Reference Data, London Market, Reinsurance

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/lloyds-of-london/lloyds-catastrophe-codes-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/lloyds-of-london/.