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Best API Mocking Tools 2026
Mocking tools let developers work with simulated API behavior while building or checking integrations. Compare supported protocols and request matching, then consider dynamic responses, OpenAPI import and mock data generation. Local deployment may shape how you prefer to work; free-plan availability and paid-from pricing add cost context. Parasoft SOAtest, Knockout API and Microcks are among the entries to examine. The listed criteria can help you compare how each option supports configuring mocks and fitting them into your development workflow.
02
Beeceptor
It suits developers, testers, and QA professionals working with API mocks for development, testing, integrations, CI pipelines, or customer demos.
WebWindowsMac+3 Record6.0 Visit
03
Mockfly
Mockfly suits frontend, backend, mobile, QA, and testing engineers who need shared mock APIs.
WebLinuxBrowser extension+2 Record5.4 Visit
04
Mockoon
WebWindowsMac+3 Record5.3 Visit
05
Knockout API
The free tier is positioned for evaluation, side projects, and open-source work.
WebAPI Record5.2 Visit
6
WireMock
WebWindowsMac+3 Free plan Record5.1 Visit WireMock Cloud is intended for developers, testers, and AI coding agents building or validating software against simulated APIs.
7
Microcks
WebWindowsMac+4 Free plan Record5.0 Visit Microcks suits API owners, developers, quality assurance teams, and platform engineers who need to mock or test APIs and microservices.
8
MockAPI
WebAPI $35 a year Record5.0 Visit MockAPI suits developers, learners, and others who need REST endpoints and generated data for prototyping, testing, or learning.
9
MockServer
WebWindowsMac+3 Free plan Record5.0 Visit MockServer suits developers and test teams that need self-hosted service virtualization, contract testing, or controlled fault injection.
10
Mockttp
WebWindowsMac+2 Free plan Record4.9 Visit Mockttp suits JavaScript developers who need HTTP mocking, proxying, or integration testing in Node.js or browsers.
11
MockWebServer
Android Free plan Record4.9 Visit It suits developers who need internal or basic tests for apps using the OkHttp client.
12
WireMock
WebLinuxAPI+1 Free plan Record4.9 Visit WireMock suits developers and teams that need to simulate APIs or services while building or testing dependent software.
13
Hoverfly
WebWindowsMac+3 $10 a month Record4.8 Visit Hoverfly suits development, functional testing, performance testing, contract testing, and service virtualization teams working with APIs.
16
moqapi.dev
WebAPI $29 a month Record4.6 Visit It suits developers and teams who need mock endpoints from API specifications, along with tools for testing, authentication, or shared project access.
18
Stoplight Prism
WebAPISelf-hosted Free plan Record4.4 Visit Prism suits development teams needing API mocks, contract validation, transformations, or proxy checks.
23
json-server
APISelf-hosted Free plan Record4.0 Visit json-server suits developers who need local REST endpoints for frontend work, tests, or prototypes.
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