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Create mock APIs in seconds with Mockoon
Mockoon lets you quickly create and run mock REST APIs on your computer. No signup needed—just download and start building mock servers for free.
Design mock APIs instantly on your desktop
Mockoon is a user-friendly tool designed to help you create and run mock REST APIs right from your computer. With no need for remote deployment or account registration, you can start building and testing mock servers in just a few clicks. The platform is free, open source, and works across multiple operating systems, making it accessible to developers everywhere.
Whether you’re developing, testing, or demonstrating APIs, Mockoon streamlines the process by providing an intuitive interface and powerful features like templating, request recording, and partial mocking. You can choose between desktop and web applications, or even use the command-line interface, depending on your workflow.
Mockoon is perfect for developers, QA engineers, and teams who need reliable API mocks without the hassle. With resources like tutorials, live training, and an active community, you’ll have everything you need to accelerate your API development and testing.
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Apidog is an all-in-one platform for designing, debugging, testing, documenting, and mocking APIs, helping teams build and manage APIs faster and together.
Stateless offers expert API strategy, design, and implementation services to help Fintech and SaaS businesses optimize growth and customer success.
GraphQL.com helps you learn and use GraphQL, making it easier to build APIs that give you exactly the data you need with a single query.
Design and register APIs easily with Apicurio. Create OpenAPI or AsyncAPI specs visually online, no coding needed. Open source API design platform.
Stoplight lets you design, document, and mock APIs quickly in one place, with an easy interface that helps teams manage the entire API lifecycle.
Find and explore Google's API Improvement Proposals, offering design guidelines, best practices, and documentation for building consistent APIs.
Swagger Editor lets you design, edit, and preview OpenAPI specifications right in your browser—no installation needed, just start creating APIs easily.
API Blueprint lets you easily design, document, and test APIs with a simple, expressive syntax—ideal for quick prototyping and collaboration.
RAML helps you design, document, and share APIs efficiently with reusable types and open source tools for developers and enterprises.
Smithy lets you design, build, and extend APIs with ease. It's a protocol-agnostic modeling tool that powers AWS services and is open for customization.
Learn about JSON-RPC, a simple and lightweight remote procedure call protocol, with clear documentation and resources for developers.
Learn the basics of REST API design with easy tutorials and resources to help you understand and create web APIs for your projects.
Tyk offers a scalable API management platform with an open source gateway, analytics, developer portal, and tools for securing and optimizing APIs.
OData.org offers an open protocol and resources to help you create, manage, and use queryable RESTful APIs with simple, standard tools and documentation.
AsyncAPI offers open-source tools to help you design, document, and manage event-driven APIs using the AsyncAPI specification for asynchronous systems.
JSONPlaceholder offers a free, fake REST API for testing and prototyping, making it easy for developers to simulate backend data and build apps quickly.
Postman is a platform for designing, building, testing, and collaborating on APIs, making it easy for teams to manage the entire API lifecycle in one place.
oEmbed offers a simple API specification to let websites easily display embedded content like photos or videos from shared links, without extra parsing.
Learn how to use JSON Patch to update JSON documents efficiently. Find specs, guides, libraries, and tools for working with partial HTTP API updates.
Open Service Broker API helps developers connect to a wide range of cloud services, making it easier to integrate tools and resources into their apps.
OpenTracing offers vendor-neutral APIs and documentation for distributed tracing, helping developers instrument and monitor complex systems easily.
Swagger UI lets you explore, visualize, and interact with APIs through a simple web interface, making it easy to understand and test endpoints.
tus.io offers an open protocol for resumable and reliable file uploads, making it easy for developers to handle large file transfers over the web.
Learn about JSON-RPC, a simple protocol for remote procedure calls, with easy-to-follow documentation and resources for developers.
WASI.dev explains the WebAssembly System Interface, offering resources and specs for running secure Wasm apps across browsers, cloud, and devices.
CloudEvents offers an open specification for standardizing event data, making it easier for developers to build and integrate event-driven systems.
x-callback-url provides a protocol for iOS apps to communicate and share data using custom URL schemes. Developers can standardize inter-app actions easily.
MessagePack offers a fast, efficient binary serialization format for exchanging data between programming languages, using less space than JSON.
OpenAPI Initiative sets the standard for describing APIs, helping you design, document, and share how APIs work for better collaboration and integration.
Worldwide Mockoon.com Alternatives
JSON:API offers a clear standard for building APIs with JSON, providing guidelines, examples, and resources for efficient API development.
Apiary is a platform for designing, developing, and documenting APIs, helping teams create and manage APIs efficiently from start to finish.
Collaborate to design, test, and debug APIs for REST, GraphQL, and more. Insomnia makes building and sharing APIs simple for teams and individuals.
JMAP offers an open, developer-friendly API standard for building fast, modern email clients and applications. Access specs, guides, and community support.
Swagger offers tools for designing, documenting, and testing APIs, helping teams collaborate and maintain quality throughout the API development process.
Cap'n Proto offers a fast binary data interchange format and RPC system, helping developers quickly serialize, transmit, and work with structured data.
Create high-quality APIs easily with Apigility. This platform helps you build, design, and manage APIs quickly, with simple tools and clear documentation.
R2DBC offers a standard API for reactive programming with SQL databases, making it easier to build scalable, non-blocking data applications in Java.
Micropub is a web standard and API for publishing content to your own website from various apps, making site management easier and more flexible.
NeuroJSON offers tools and specs for sharing and validating neuroimaging data in easy-to-use JSON formats for research, cloud, and web use.
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