10 Best API Mocking Tools (2024 Review)

Mocking APIs is essential for simulating responses and scenarios during API testing. With the increasing use of APIs, mocking tools have become crucial for developers. This review highlights the best API mocking tools to consider in 2024, focusing on features, ease of use, and platform compatibility.

What Are API Mocking Tools?

API mocking tools enable users to create a mock version of an API, configuring it to return specific responses to incoming requests. This allows developers to test their applications without relying on a live API. Mocking tools can simulate various responses, including error messages and latency, making them invaluable during the testing phase.

API Mocking: Everything You Need to Know

API mocking enhances development by allowing services to be simulated before they are fully ready. Apidog offers a no-code, intuitive platform for mocking APIs, which is ideal for early testing, cost savings, and seamless collaboration. From local to cloud-based mocking, Apidog’s versatile features cater to developers' needs.

When Do We Need Mock APIs?

Mock APIs are beneficial in several scenarios:

• Testing: They allow functionality testing of applications without a live API, helping developers identify and resolve issues.
• Development: Developers can create and test applications without waiting for a live API, especially useful when the API isn’t available yet.
• Simulation: Mock APIs help simulate various scenarios and behaviors that might be difficult to reproduce with a live API.
• Isolation: They allow developers to focus on the functionality of their applications without external influences.

Overall, mocking APIs is advantageous whenever testing or developing an application without a live API is necessary.

Top 10 API Mocking Tools in 2024

There are numerous API mocking tools available, each offering unique features. This review examines the top tools, detailing their capabilities, supported platforms, pricing, and documentation.

1. Apidog

Apidog is a free and all-in-one API development platform that enables users to import API definitions and generate mock data for testing. Its smart mock feature automatically generates mock data based on field names, facilitating realistic testing without manual input. Apidog is a strong choice for developers seeking a simple, effective tool for testing and development.

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2. Postman

Postman is a widely used tool for API testing and interaction. Its "Mock Servers" feature lets you create a mock version of your API, returning specific responses for testing. While useful, Postman may lack advanced mock server management features compared to other tools.

3. Mocki

Mocki is an online tool for creating and hosting mock APIs. It offers easy setup for returning specific responses and supports importing/exporting mock configurations and generating random data. As a cloud-based solution, Mocki facilitates collaboration among team members.

4. Mockoon

Mockoon is an open-source tool for managing mock servers. It allows users to create mock APIs and configure specific responses easily. With features like importing/exporting configurations and generating random data, Mockoon is versatile for developers.

5. Stoplight

Stoplight is a comprehensive platform for API design, documentation, and testing. Its "Mocks" feature supports creating mock versions for testing, along with other development tools. However, it may require a subscription for full access.

6. MockAPI

MockAPI allows users to create and host mock APIs easily. It features cloud-based accessibility, making it ideal for remote collaboration. MockAPI supports importing/exporting configurations and generating random data for responses.

7. WireMock

WireMock is a Java-based library for stubbing and mocking web services. It allows conditional response setup, latency simulation, and HTTP traffic recording. WireMock is open-source and free, suitable for developers familiar with Java.

8. Mountebank

Mountebank is a cross-platform tool for creating mock servers. It uses a simple configuration file for defining mock behaviors, simulating various scenarios like error responses. Mountebank is open-source and free, offering flexibility for developers.

9. Apigee

Apigee is a robust platform for API design, building, and testing. Its API mocking feature supports creating mock APIs for testing purposes. Apigee offers extensive tools but may be complex and subscription-based.

10. Hoverfly

Hoverfly is an open-source tool for mocking APIs. It features easy setup for mock configurations, random data generation, and conditional response setup. Hoverfly is useful for testing in various scenarios and troubleshooting issues.

By utilizing these tools, developers can enhance their testing and development processes, ensuring robust and reliable API performance.