Api Mock Server

What This Skill Does

The API Mock Server skill empowers developers to instantly create fully functional mock API environments from OpenAPI (Swagger) specifications. By automating the transition from API contract to running server, it removes the need for backend dependencies during frontend or mobile development. Using tools like Prism, it provides dynamic response generation based on schema definitions, ensuring that client applications receive realistic data payloads that adhere to strict data types, formats, and constraints defined in your spec. If an existing spec is missing, the skill assists you in architecting endpoints interactively, converting your requirements into a valid OpenAPI 3.0 file, and spinning up a local mock server on the fly.

Installation

To integrate this capability into your workflow, execute the following command in your terminal: clawhub install openclaw/skills/skills/sa9saq/api-mock-server Ensure you have Node.js 16+ installed, as the skill utilizes npx to manage dependency-free execution of CLI tools like Prism and json-server.

Use Cases

• Frontend Development: Build and test UI components against stable API responses without waiting for backend teams to complete implementation.
• Contract Testing: Validate that your API implementation matches the documented contract by comparing mock outputs against production specifications.
• Rapid Prototyping: Demonstrate an application's full functionality to stakeholders using synthetic data that mimics production environments.
• Integration Testing: Create deterministic test scenarios where the mock server returns specific error codes or delays to test client-side resilience.

Example Prompts

1. "I have an OpenAPI spec at ./api-schema.yaml. Can you start a mock server for me on port 5000 using Prism?"
2. "I need an API endpoint for a user profile with fields for name, email, and age. Create an OpenAPI spec for me and start a local mock server."
3. "My frontend needs to test a 404 error scenario for the /orders endpoint. How can I configure the mock server to return that?"

Tips & Limitations

• Tips: Always use the --dynamic flag for Prism to ensure your frontend receives randomized, realistic data rather than static responses. If you are developing a browser-based application, remember to include the --cors flag to avoid cross-origin request blocking.
• Limitations: This skill is strictly for development environments. It does not provide enterprise-grade performance or authentication security, and it should never be deployed to public servers. For complex APIs involving deeply nested dependencies or intricate business logic, consider utilizing the Custom Express Server fallback to script specific response overrides.