Onboard developers in days, not months
When a sandbox can’t run a real integration, developers and AI agents only find out what works and what breaks once they reach production. Most sandboxes are:
Static example responses can’t run a real business flow, hold state or return errors. Integrations that pass in the sandbox break at go-live.
A real staging environment means rebuilding the logic and data of every system behind the API. Once outside developers use it, it has to be run like production.
Without a realistic sandbox, every new customer needs test accounts and test data set up by hand before they can start. Onboarding takes months.
AI agents call APIs in parallel and at volume, and a sandbox sized for occasional human testing falls over under that load.
WireMock Cloud gives every API you publish a matching simulation. Developers run the whole flow, from opening an account to handling a declined payment, without touching a real system.
A payment created in one call can be refunded by its ID in the next. Responses draw on CSV test data, and test values you choose trigger each error, delay or rate limit.
Update the spec and the sandbox updates with it. Validation flags any response that breaks the spec, and you can version the sandbox with each API release. No spec? Ask WireMock to create one.
No connection to production systems or regulated data. Each sandbox has its own URL and authentication, and state is scoped to each customer’s credentials, so one customer’s test data never shows up for another.
Agents explore your API without touching production. Responses follow rules you define, so a failing call can be reproduced, and dedicated instances handle parallel traffic.
Ali FendriAPI Product Manager, Coface“WireMock enables smoother, more automated integration with less manual work – making the process quicker for us and our customers.”
Coface, global credit insurer. Customers used to test with limited test contracts against production. Now WireMock Cloud sandboxes simulate the business logic and state behind its APIs, a public portal documents the test scenarios, and sample requests come ready to run. Customer onboarding went from 2–3 months to days or weeks.
Gabriel DuchateauHead of Solutions, Zenus Bank“Creating new environments takes hours instead of days or weeks.”
Zenus Bank, US digital bank and banking-as-a-service provider. WireMock Cloud is the backend of its portal’s API playground. Every Zenus API has a matching simulation, updated by editing its Swagger definition. The portal launched in weeks instead of months.
Generate the sandbox from your OpenAPI or Swagger spec, record it from a test environment, or build it with a coding agent through WireMock’s MCP server.
Point your portal’s try-it console and your Postman collections at the sandbox URL, behind your own API gateway and domain if you prefer. Host the sandbox in WireMock Cloud, or run it on your own premises with WireMock Runner and the CLI.
Developers and agents build and test the complete journey against the sandbox, then switch the base URL to production.
Book a demo. Bring your OpenAPI spec (optional). Leave with a working sandbox.
