json-server vs Mock Service Worker (MSW)
No clear leader: json-server (62.5) and Mock Service Worker (MSW) (60.5) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for api mocking. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
json-server
An open-source tool that generates a full-featured REST API server from a JSON or JSON5 file, enabling rapid prototyping and testing without backend development.
Mock Service Worker (MSW)
An open-source API mocking library that uses the Service Worker API to intercept network requests in browsers and Node.js, enabling developers to mock REST, GraphQL, and WebSocket APIs for testing and development without modifying application code.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
json-server
Not documented yet.
Mock Service Worker (MSW)
- Vitest
- Playwright
- Storybook
- React Native
- Express
- fetch
- axios
- react-query
- Hono
- Fastify
json-server or Mock Service Worker (MSW): which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.