30 open-source projects similar to ctimmerm/axios-mock-adapter, ranked by shared indexed features. Tags may describe platforms or build tools rather than the same primary purpose. Check each project’s use case, license, and deployment requirements before treating it as a replacement.
Fetch-mock is a testing utility designed to isolate application code from external network dependencies by intercepting and overriding outgoing traffic. It functions as a network request interceptor that captures calls made via the Fetch API, allowing developers to simulate server responses and verify application behavior without requiring a live backend infrastructure. The library distinguishes itself through a unified interface that provides consistent network interception logic across diverse runtime environments, including browsers, service workers, and server-side platforms. By replacing
MSW is a JavaScript API mocking library and integration testing tool designed to intercept network requests at the network level. It allows for the definition of mock data and status codes using routing syntax to simulate server responses without requiring changes to the application source code. The project utilizes a service worker to proxy API calls in the browser, providing a mechanism for isolated frontend development and testing. It employs platform-specific network adapters to maintain a consistent mocking interface across both browser and Node.js environments. The library covers a ran
Pollyjs is an HTTP mocking and recording library designed to capture and replay network interactions to create deterministic tests. It functions as a request interceptor and stubbing framework that records real API responses into files, ensuring consistent test results across different environments without relying on live network servers. The tool utilizes pluggable network adapters to support various environments and employs a state-based mode switching system to toggle between recording, replaying, and stubbing behaviors. It uses pattern-based request matching and persistent interaction sto
nock is a Node.js HTTP mocking library and request interceptor. It captures outgoing network traffic to specific hosts and paths, returning predefined responses to decouple applications from external servers during automated testing. The project functions as an API expectation framework to verify that specific calls were made with correct parameters. It includes a traffic recorder that captures real network interactions as fixtures for playback and a network simulation tool to introduce artificial latency or trigger network errors. Its capabilities cover request matching via hostnames, paths
Responses is a Python mocking library designed to intercept outgoing HTTP calls made with the Requests library to return predefined simulated responses. It functions as a request verification framework and a network simulation tool, allowing for the verification of application behavior against various API response patterns without making real network calls. The project distinguishes itself through a traffic recorder that captures real network interactions and saves them to files for deterministic replay. It further enables the simulation of complex network scenarios, including the triggering
Nock is a Node.js HTTP mocking library used to intercept outgoing network requests and return predefined responses. It functions as a network request interceptor and HTTP mock server, allowing developers to simulate external API behavior for automated testing without making live network calls. The project includes an API fixture recorder to capture real network interactions and save them as reusable data files for playback. It also features a network latency simulator that introduces artificial delays to outgoing HTTP responses to verify timeout handling and race conditions. The library prov
Mockserver is a multi-protocol mock server and API verification proxy used to simulate HTTP, gRPC, and WebSocket endpoints. It functions as a tool for testing client applications without relying on live backend services, providing a system to simulate chat completions and streaming responses for large language model integrations. The project automates behavior by generating request expectations and response behaviors from OpenAPI and Swagger specification files. It differentiates itself through a network traffic simulator that introduces latency, dropped connections, and failures to verify ho
Axios is an isomorphic, promise-based HTTP client designed for making asynchronous network requests across different JavaScript execution environments, including the browser and Node.js. It functions as a JSON API client that serializes JavaScript objects into JSON and parses server responses into structured data. The project features a system for managing reusable client instances with shared configurations, such as base URLs and default settings. It includes a mechanism for intercepting outgoing requests and incoming responses globally, allowing data to be transformed before it reaches the
Fly is an HTTP client library and cross-platform network wrapper that provides a unified Promise-based interface for managing network requests across diverse JavaScript runtimes and operating systems. It functions as a multi-runtime request manager, abstracting underlying HTTP engines to ensure consistent behavior between browsers and native environments. The library features a middleware system for capturing and modifying outgoing requests and incoming responses through a request interceptor pipeline. It employs adapter-based engine switching to maintain a consistent API across different pla
Mirage JS is a browser-based mock server and client-side API simulator designed for JavaScript application development. It functions as a mocking tool that intercepts network requests to simulate backend API behavior, allowing developers to build and test frontend interfaces without requiring live backend infrastructure. The tool provides a simulation layer that mimics REST endpoints to facilitate rapid prototyping of user flows and application logic. It enables the creation of fake server responses directly within the web browser to verify how an application handles various data scenarios an
JSONPlaceholder is a REST API mock server and JSON mocking service that provides a hosted frontend development sandbox. It functions as a fake backend that returns predefined JSON responses to simulate a REST API for development and testing. The service supports cross-origin resource sharing, allowing API integrations to be tested from different browser domains. It enables the simulation of CRUD operations and the retrieval of mock data without requiring a live database. The system maps URL patterns to a static JSON-based data store and handles requests statelessly. It includes capabilities
Got is a promise-based HTTP request library for Node.js that supports HTTP/2 and streaming. It provides a system for making network requests with a focus on asynchronous control flow and type-safe API client development. The library is distinguished by its middleware-based request lifecycle, which uses interceptors and plugins to modify request options and response data. It includes a configurable automatic retry mechanism with backoff strategies, a built-in HTTP response cache, and a cookie-jar system for maintaining persistent sessions. Broad capabilities cover data handling through duplex
Mockoon is an HTTP API simulation platform and design tool used to create fake API endpoints that simulate server responses without a backend. It functions as an OpenAPI mock server tool and a JSON API mocking utility, allowing for the rapid iteration of API contracts and the generation of response templates. The project distinguishes itself through a combination of stateful mocking, using a local JSON database to simulate CRUD operations, and the ability to run as a headless API mock server via a command line interface. It supports real-time collaborative editing and AI-assisted prototyping
OkHttp is an HTTP client for the JVM and Android that enables network communication via synchronous and asynchronous requests. It provides a core identity as a comprehensive networking toolkit featuring a WebSocket client for bidirectional data synchronization, a TLS security toolkit for encrypted communication, and a programmable HTTP mock server for simulating backend responses. The project distinguishes itself through a specialized security and performance architecture. It implements mutual TLS, certificate pinning, and DNS over HTTPS to secure data in transit, while utilizing connection p
WireMock is a suite of tools for service virtualization, providing mock servers for HTTP APIs and WebSocket communication. It serves as an HTTP API mock server and request verifier, allowing for the simulation of responses and the interception of network requests to test client applications without a live backend. The project differentiates itself through a service virtualization model that records real network traffic and replays it as stubs to mimic external service behavior. It includes a network fault injector to simulate response delays and connectivity issues, and a stateful scenario ma
WebMock is a Ruby library for HTTP request stubbing, response simulation, and network interception. It serves as a test assertion framework for verifying outgoing HTTP traffic and a network interception layer that blocks external connections to prevent accidental requests during testing. The project provides capabilities for dynamic response generation and the sequencing of different return values for repeated requests to the same endpoint. It supports simulating network failures, such as timeouts or exceptions, and allows for response replays using raw HTTP data loaded from local files. The
OHHTTPStubs is an HTTP network mocking library and request interceptor used to simulate server responses for testing application behavior without a live backend. It functions as a network request stubbing tool that captures outgoing network calls and replaces them with predefined mock data, custom status codes, and headers. The library distinguishes itself through its ability to simulate a wide range of network conditions, including artificial latency and connection failures. It supports dynamic response sequencing, allowing the tool to return a series of different responses for the same requ
This project is a multi-protocol API simulation and mocking system designed to replace external dependencies during development and testing. It provides an API mocking server, a network traffic proxy, and specialized simulators for language model services and identity providers. The system distinguishes itself through deep AI simulation capabilities, including the emulation of language model providers and Model Context Protocol servers using JSON-RPC 2.0. It supports multi-turn conversational logic, state tracking for AI chat APIs, and the visualization of agent execution through call graphs
Feign is a declarative Java HTTP client framework that maps method signatures to REST API requests. It functions as an HTTP interface mapper, allowing the creation of type-safe clients by defining service interfaces with annotations to eliminate manual request logic. The framework features a pluggable HTTP transport layer, which decouples request definition from execution by routing network traffic through interchangeable underlying HTTP engines. It provides a comprehensive request management pipeline including interceptors for modifying headers, policy-driven retry logic for failure recover
Dio is a cross-platform HTTP client for Dart designed to manage network requests and data communication across mobile and desktop applications. It provides a comprehensive framework for executing standard web operations while handling complex tasks such as request lifecycles, connection security, and global configuration. The library distinguishes itself through an extensible architecture that allows developers to hook into the request and response pipeline. By utilizing interceptors and custom network adapters, users can modify traffic, perform authentication, and swap underlying networking
Elysia is a high-performance TypeScript web framework designed for building type-safe backend services. It provides a modular, plugin-based architecture that allows developers to compose server logic, middleware, and validation schemas into scalable application instances. By leveraging native web standards, the framework ensures portability across diverse JavaScript runtimes, including Node.js, Deno, and various edge computing environments. The framework distinguishes itself through its focus on end-to-end type safety, automatically synchronizing request and response definitions between the s
This project is a REST mock API and e-commerce sandbox that provides simulated backend data for testing and prototyping. It serves as a JSON data provider, offering predefined endpoints to manage product catalogs, customer profiles, and shopping carts. The system uses JSON-based mock persistence and in-memory state simulation to deliver consistent data without a database. It includes a JWT authentication mock that simulates user login flows by issuing tokens to verify identity and access to protected resources. The API covers capabilities for catalog management, shopping cart operations, and
Flurl is a .NET fluent URL builder and HTTP client wrapper designed for constructing complex web addresses and sending requests with a chainable interface. It functions as a URL manipulation library and an HTTP mocking framework to facilitate network interaction and testing. The project distinguishes itself through a fluent interface that allows for the incremental construction of paths, query parameters, and fragments. It provides a dedicated mocking system to intercept outgoing network traffic and return predefined responses, enabling isolated unit testing without a live server. Its broade
Mock is a JavaScript API mocking tool and network request interceptor designed to decouple front-end development from back-end progress. It functions as an API simulation tool and mock data generator, allowing developers to build user interfaces and high-fidelity prototypes by mimicking the request and response cycle without a live server. The system provides a mechanism for intercepting outgoing HTTP calls and returning simulated data. It enables front-end prototyping by generating synthetic datasets to validate application behavior during automated testing cycles and development. Capabilit
Pyppeteer is a Python library for controlling Chromium-based browsers using the Chrome DevTools Protocol. It functions as a headless browser automation tool, allowing for the programmatic navigation of web pages and the extraction of data from dynamic websites. The project provides low-level browser control through direct communication with the Chrome DevTools Protocol, enabling the interception and modification of network traffic. It differentiates itself by offering specialized performance profiling capabilities, including the measurement of JavaScript and CSS code coverage and the capture
CrawlerTutorial is a comprehensive Python web scraping tutorial and framework designed for extracting data from static and dynamic websites. It functions as a web data extraction pipeline and an HTTP request orchestrator, covering the full lifecycle of scraping applications from initial fetching to final data storage. The project provides specialized guidance on anti-bot bypass techniques and web API reverse engineering. It includes methods for evading browser detection through identity masking and proxy rotation, as well as techniques for identifying hidden API endpoints by analyzing network
This project is a webpack plugin that implements a service worker to manage web assets for offline access. It serves as a caching tool to ensure web applications remain functional and accessible when an internet connection is unavailable. The tool automates the process of creating progressive web applications by integrating directly into the webpack build process. It generates the necessary service worker configurations and manages the local storage of static files to maintain application availability. The system handles asset caching and cache management, utilizing a manifest-driven approac
Ant Design Pro is a comprehensive starter kit and administrative framework for building enterprise-level admin dashboards and professional user interfaces. It provides a structured project foundation and a set of React admin templates, including pre-defined layout blocks and routing configurations. The framework distinguishes itself by providing a built-in frontend mocking environment and mock-service middleware to simulate backend API responses during development. It also features integrated conversational AI components and assistant pages for embedding intelligent interactions directly into
Axios is a promise-based HTTP client used to make asynchronous network requests in both browser and Node.js environments. It functions as a multi-environment network adapter that abstracts the transport layer to ensure consistent behavior across different runtimes. The project distinguishes itself through a request lifecycle management system that allows for the cancellation of active requests, the setting of timeouts, and the monitoring of upload and download transfer progress. It includes a mechanism for intercepting network traffic, enabling the transformation of outgoing requests and inco