Base
Hardened build
minimal ports, security patches applied at build time
Stoplight Prism on Ubuntu 24.04 LTS
Azure
Developer Tools
Stoplight Prism, an open source HTTP mock server and contract validation proxy driven by your API description.
Overview
Stoplight Prism is an open source HTTP mock server and request validation proxy. Point it at an OpenAPI, Swagger or Postman description and it stands up a live mock API that returns schema conformant example responses and validates every request against the contract, so teams can build against an API before the backend exists and prove a service honours its published contract.
Why the cloudimg image
cloudimg delivers Prism fully installed on a hardened, fully patched image with a working sample OpenAPI specification served on first boot, so a live mock API is reachable within minutes. Prism is unauthenticated by design, so there is no login to manage; cloudimg runs it as a dedicated unprivileged service account under a hardened systemd unit that exposes only the mock, with no baked SSH key or default credential. Backed by 24/7 support.
Common uses
- Stand up a live mock API from an OpenAPI, Swagger or Postman description so front end and integration teams build before the backend exists
- Validate that requests and responses conform to an API contract to catch mismatches early
- Run a contract validation proxy in front of a real service to enforce its published specification
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