Introducing Agent Skills for WireMock Cloud

Agentic development is an ongoing priority for software teams. We’re committed to supporting our customers’ journey towards the AI-SDLC with AI-native capabilities in WireMock Cloud - including the WireMock MCP Server, CLI, and APIs. These features enable developers to use agentic workflows, powered by WireMock Cloud, to accelerate key environment simulation workflows: context-aware API simulation, intelligent recording, improving API mocks with realistic response data, and more.

Today we are announcing new Agent Skills to simplify agentic development with WireMock Cloud, improve output quality via built-in validation, and help more teams see value with WireMock AI, quickly.

Watch the Demo Video

See how Tom Akehurst uses Agent Skills to realistically simulate the Whatsapp Business API with zero manual configuration, with results validated via Arazzo workflows:

About Agent Skills

Agent Skills is an open format for extending coding agents with domain-specific knowledge and workflows. Where MCP gives agents tools (the ability to call APIs and perform actions), skills give agents expertise in the form of best practices, workflows, and orchestration guidelines Skills are discovered automatically at agent startup and triggered by context, so they stay out of the way until they're relevant to the task at hand.

What’s Included

The WireMock Cloud plugin bundles seven skills that let agents build, validate, and manage mock APIs, from generating a complete API simulation to converting stubs into stateful or data-driven variants.

The flagship skill is /build-api-simulation, a slash command that generates a complete mock API from scratch: an OpenAPI spec, Arazzo test workflows, and a full set of WireMock stubs. The agent gathers documentation, generates the stubs, and validates the result against the OpenAPI spec - iterating until it hits zero validation errors (more on this below). 

The remaining six skills handle the day-to-day work of maintaining and improving simulations, and fire automatically based on context. Create stubs generates and imports new WireMock stubs for an existing mock API. Convert to stateful and convert to data-driven upgrade basic stubs to use the key-value state store or external data sources (CSV, database), respectively. Validate and fix stubs checks stubs against the OpenAPI schema and patches errors. Author response templates helps write and debug Handlebars templates for dynamic responses. And search WireMock Cloud docs gives the agent access to cached documentation so it can answer its own questions about request matching, response templating, and CLI usage without leaving the editor.

The validation loop is an important addition: Both /build-api-simulation and the validate and fix skill use Arazzo workflows to run contract tests against the generated simulation, comparing actual responses to the OpenAPI spec. The agent pulls the validation log via MCP, identifies mismatches, and fixes them - repeating until the log is clean. This means the simulation you get at the end actually conforms to the API contract, not just a best-effort approximation.

How to Install WireMock Cloud Agent Skills

Agent Skills are available for Claude Code, GitHub Copilot, Cursor, and other coding agents. For installation instruction, visit the documentation page.