MockBase
Create dynamic mock APIs in seconds, with stateful CRUD and a live request inspector. No signup to try.
Create dynamic mock APIs in seconds, with stateful CRUD and a live request inspector. No signup to try.
This page is designed to help you find out whether MockBase is good and if it is the right choice for you.
MockBase is a hosted API mocking tool: click once and get a live HTTPS endpoint you can point a frontend, mobile app, or CI pipeline at, before the real backend exists. Each mock supports multiple routes, each with its own status code, response body, and optional delay, and can go well beyond static responses — routes can match differently depending on query params, headers, or JSON body fields, render responses as sandboxed Jinja2 templates that echo back request data or generate fresh UUIDs and timestamps, behave like a real resource collection with full CRUD (create, read, update, delete) backed by server-side state instead of returning the same static body every time, inject random failures at a configurable rate to test retry logic and error handling before it hits production, and proxy and record real API traffic for requests that don't match a configured route, turning captured exchanges into permanent routes with one click. Every request to a mock streams live into a WebSocket-based request inspector — method, path, headers, body, latency, and client IP — so you can confirm your app is calling what you think it's calling. Mocks can be created without an account (1 mock, 4 routes) or imported directly from an existing OpenAPI 3.x spec, and signed-in accounts get unlimited mocks and routes, plus custom subdomains, token-protected endpoints, and a higher request quota, all free during the current beta.
Listed in
Free mock API service
MockBase offers a free platform for creating mock REST APIs, making it accessible for developers who need to prototype or test without incurring costs.
Quick setup
Users can quickly create mock endpoints without needing to write backend code, which speeds up frontend development and testing workflows.
No authentication required for basic use
MockBase allows users to start creating mock endpoints without complex sign-up or authentication processes, lowering the barrier to entry.
Useful for frontend development
Frontend developers can use MockBase to simulate backend responses, allowing them to build and test UI components independently of backend development timelines.
Simple JSON response configuration
The platform allows users to define custom JSON responses for their mock endpoints, which is helpful for simulating various API scenarios.
MockBase is currently in public beta — there isn't a public customer list yet.
Most mock API tools make you pick one thing: a local desktop app (Mockoon), a zero-setup hosted stub (Beeceptor), or a spec-driven mock tied to a collection (Postman). MockBase puts conditional matching, sandboxed Jinja2 templating, stateful CRUD (a mock that actually remembers what you POSTed to it), chaos injection, and OpenAPI import/export into one hosted endpoint, with a live WebSocket request inspector on every mock. It's usable with zero signup — one click gets you a working endpoint with sample routes already on it.
If you need more than "return this JSON" — a mock that behaves differently based on a header, remembers what you created and lets you read it back, or fails on purpose at a rate you control to test retry logic — that combination usually means stitching together a local tool plus custom code. MockBase bundles it into one hosted URL your whole team (or a CI pipeline) can hit, without anyone running a local server.
Frontend and mobile developers who need to build against an API before the backend is ready, QA/test engineers who need to reproduce specific error conditions (timeouts, rate limits, partial failures) that are hard to trigger against a real dependency on demand, and teams doing API-first development who want to agree on a contract and start building in parallel instead of waiting.
Frontend work rarely waits for backend work to finish, and standing up a throwaway server just to unblock yourself is its own chore — dependencies, a port to remember, a process to keep alive. MockBase exists for that specific moment: a live endpoint in seconds, no server to babysit. It's deliberately narrow — not a full API platform with design, docs, and team management bundled in, just mocking, done well enough (dynamic responses, statefulness, realistic failure injection) to actually build and test against.
Python (FastAPI) on the backend with Redis for the hot-path mock configuration, request logs, and state storage, and PostgreSQL for accounts and content. The frontend is React with Vite and Tailwind CSS. Dynamic response templating runs on a sandboxed Jinja2 environment.
We have collected here some useful links to help you find out if MockBase is good.
Check the traffic stats of MockBase on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of MockBase on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of MockBase's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of MockBase on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about MockBase on Reddit. This can help you find out how popualr the product is and what people think about it.
Do you know an article comparing MockBase to other products?
Suggest a link to a post with product alternatives.
Is MockBase good? This is an informative page that will help you find out. Moreover, you can review and discuss MockBase here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
