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Tech riderRev. 4 Oct 2026

MockWebServer

Ch 186.6of 27 API Mocking Tools
  1. 1Runs onNot stated by the maker
  2. 2CostsFree plan
  3. 3Dynamic responsesYes
  4. 4Request matchingpath
  5. 5Local deploymentYes
  6. 6Supported protocolsHTTP, HTTPS, HTTP/2
5 lines stated Written from the maker's own pages: square.github.io, github.com
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Overview

MockWebServer is ranked #18 of 27 in API mocking tools on Specifiction. There is a free plan.

MockWebServer plans and pricing

All plans
Open source Free Apache License 2.0 github.com · 4 Oct 2026

Compared on API mocking tools

Dynamic responses
Yessquare.github.io
Request matching
pathsquare.github.io
Local deployment
Yessquare.github.io
Supported protocols
HTTP, HTTPS, HTTP/2square.github.io

Facts

Purpose
MockWebServer is a scriptable web server for testing HTTP clients.github.com · 4 Oct 2026
Test coverage
It lets developers specify responses and verify requests made by an app during HTTP and HTTPS calls.github.com · 4 Oct 2026
Protocols
OkHttp describes MockWebServer as a library for testing HTTP, HTTPS, and HTTP/2 clients.github.com · 4 Oct 2026
Request verification
Recorded requests can be checked by method, path, HTTP version, body, and headers.github.com · 4 Oct 2026
Response scripting
Responses can be queued in order or generated by a Dispatcher that applies a policy to each request.github.com · 4 Oct 2026
Simulated network conditions
Mock responses can be throttled to simulate a slow network for timeout and interactive testing.github.com · 4 Oct 2026
Test languages
The README provides example tests in both Java and Kotlin.github.com · 4 Oct 2026
Installation
The README lists the test dependency as com.squareup.okhttp3:mockwebserver3:5.5.0.github.com · 4 Oct 2026
Integrations
The project documentation describes using MockWebServer to test apps that use the OkHttp client.github.com · 4 Oct 2026
License
The MockWebServer README states that the library is licensed under Apache License, Version 2.0.github.com · 4 Oct 2026
Scope limit
The OkHttp project says MockWebServer is intended for internal and basic client testing, is not a full-featured standalone HTTP testing library, and is not actively developed for new features.github.com · 4 Oct 2026
Alternative
The project documentation suggests MockServer for users whose needs outgrow MockWebServer.github.com · 4 Oct 2026

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Sources