Generate a stateful API simulation scaffold from an OpenAPI spec.
npx skills add https://github.com/counterfact/api-simulator --skill build-simulation
Please help me install this Agent Skill. Skill: build-simulation Source: https://github.com/counterfact/api-simulator/tree/main/skills/build-simulation Command: npx skills add https://github.com/counterfact/api-simulator --skill build-simulation
Build-Simulation helps AI agents generate a complete, stateful API simulation from a bare OpenAPI spec, including scaffold creation, real-behavior research, context implementation, tests, and startup scenario setup.
Run Counterfact against your OpenAPI spec to generate a ready-to-use, stateful mock API in an output directory.
High-intent search queries and answers about installing and using this skill.
Generating a stateful mock server from an OpenAPI spec produces a runnable scaffold with routes and types, wiring startup scenarios so the API simulation maintains state across requests without manual setup.
A stateful API simulation is a mock server retaining data across calls. You need one for end-to-end testing when workflows require realistic startup data and scenario scripting to validate complex API interactions.
Yes, you can configure startup and scenario scripts in the API simulator. This seeds realistic stateful behavior by applying research-driven context, making the mock server immediately useful without manual data setup.
Yes, running this against your OpenAPI document automatically generates a ready-to-use directory structure. It produces runnable scaffold outputs under routes and types directories for immediate mock endpoint execution.
The best way to mock complex API behaviors for end-to-end testing is generating a fully stateful API simulation from your spec, embedding research-driven context and scenario scripts to replicate real-world interactions.
You use a stateful mock server instead of a static API mock when you need to validate dynamic interactions. Stateful simulations track data changes across requests, supporting complex scenario scripts that static mocks cannot handle.
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