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Exploring the 8 Best API Design Tools for 2024

Abeeha Jaffery

Lead - Campaign Marketing

March 20th, 2024

Well-designed and robust APIs are the foundation of a successful application development process. However, a recent survey found that many companies face challenges when designing APIs, to be precise 31% seem to struggle. 14% also mentioned that not having the right tools adds to the task of creating a good API. Fortunately, today there are API design tools available in the market to accelerate and streamline the process.

In this blog, we’ll dive into the importance of API design tools, key features to look for and review the top tools in the market. We’ll also provide tips on choosing the right tool for your needs and maximizing its benefits. So, let’s get started!

Understanding the Importance of API Design Tools

API design tools can provide features and functionalities that simplify the design and implementation of APIs. These tools offer a range of benefits, such as:

  • Improved Collaboration: API design tools facilitate collaboration between developers, designers, and stakeholders. They provide a centralized platform where teams can  share ideas and collaborate effectively. Having a dedicated space for collaboration ensure that everyone is on the same page and working towards a common goal.
  • Enhanced Documentation: Good API documentation is essential for other API developers. API design tools often include features that autogenerate documentation based on the design, making it easier for other developers to understand and use the API.
  • Increased Efficiency: API design tools provide a structured environment for defining API endpoints, methods, and data structures, which streamlines the development process by reducing the time and effort required to create APIs. You can also use pre-built templates available in tools to expedite API design and implementation.
  • Consistency: API tools enforce naming conventions, design patterns, and coding standards, ensuring that all API components adhere to a consistent style. Consistency is vital for readability, maintainability, and ease of use, especially when multiple developers are involved in the project.

Key Features to Look for in API Design Tools

When choosing an API design tool, you must look for certain key features to ensure you select a tool that meets your specific needs and requirements. Here are some essential features to look for:

User-Friendliness and Ease of Use

One of the most important aspects of an API design tool is its user-friendliness. A tool should be intuitive and easy to use, even for those new to API design. Look for tools that offer a clean, user-friendly interface with drag-and-drop functionality and clear documentation.

Additionally, consider the learning curve associated with the tool. If it takes days or weeks to learn how to use it effectively, it may not be the best choice for your team.

Furthermore, a user-friendly API design tool should provide comprehensive tutorials and guides to assist you in understanding the tool’s features and capabilities. These resources can help you quickly get up to speed and make the most of the tool’s functionality.

Integration Capabilities

API design is part of a larger development ecosystem. it’s crucial that the API design tool seamlessly integrates with other tools and platforms used in your development process. Look for tools that offer integrations with popular coding environments, version control systems, and project management tools.

In addition to integration with development tools, consider whether the API design tool supports integration with API management platforms. This integration can facilitate the seamless transition from design to implementation and deployment, ensuring that your API design aligns with your overall API strategy.

Scalability and Performance

As your API grows, it’s vital to ensure your design tool can handle the increasing complexity and scale. Look for tools to handle large projects and offer performance optimizations to ensure smooth operation.

Consider the tool’s ability to handle multiple collaborators and large volumes of data. A tool that can scale with your needs will save you from switching tools as your API development progresses.

Furthermore, performance is a critical aspect to consider. A high-performing API design tool will enable faster design iterations and reduce the time required to bring your API to market. It is essential to consider tools that offer real-time collaboration, instant feedback, and efficient code generation to enhance your team’s productivity.

Additionally, consider the tool’s ability to handle complex API design scenarios, such as authentication, rate limiting, and error handling. A robust API design tool should provide comprehensive support for these scenarios, ensuring your API design is secure and reliable.

Top 8 API Design Tools

Now that we have discussed the importance of API design tools and key features to look for, let us review some of the top API design tools available in the market:

1. Astera

Astera is a unified, code-free solution that offers a robust platform for API development and integrations.

With built-in connectivity to a wide array of data sources, it is a versatile solution for various use cases. You can easily design, test, develop, manage, publish, and monitor your APIs and integrations using the no-code, intuitive user interface that comes equipped with advanced data integration capabilities.

Astera’s API builder is a blank canvas where you can visually construct request processing pipelines. Every API pipeline begins with a request and culminates in one or more responses. Between the request and response, you have the flexibility to apply a wide range of transformations, data access restrictions, validations, and data manipulation actions.

Astera API design tool

Its API design features include:

  • Visual Interface: Build and test APIs in minutes using a drag-and-drop interface.
  • Diverse Elements: Access numerous sources, transformations, and external APIs like payment services and CRM products.
  • Testing: Enjoy instant previews and auto-generated documentation for efficient testing and deployment.
  • HTTP Methods: Support for GET, PUT, POST, DELETE, and PATCH methods.
  • URL Customization: Parameterizable URLs with query parameters and validation.
  • Payload Handling: Manage complex request payloads, mapping, and validation.
  • Pre-handled Responses: Choose from built-in responses, including error handling.
  • Conditional Responses: Define multiple responses based on user-specified conditions, especially for complex payloads.
  • Connectivity: Astera’s API builder seamlessly connects to databases, ERP applications, web services, and more.
  • API documentation: Astera Auto-generates documentation encapsulating all API details saving you time and effort.

2. Postman

Postman is a widely used API development solution that provides a comprehensive suite of tools to assist teams in various aspects of API development. Its API design features include:

  • API Builder: Postman’s API Builder is a visual tool that supports the design of APIs in various formats like OpenAPI, RAML, and GraphQL. It offers features such as versioning, documentation generation, and collaboration.
  • API Collections: API Collections are groups of requests that can be used to test and document APIs, supporting various types like REST, GraphQL, and SOAP. They facilitate testing different scenarios such as data creation, retrieval, update, and deletion.
  • API Documentation: Postman can automatically generate API documentation based on OpenAPI definitions, which can be shared with developers and stakeholders for a better understanding.
  • API Collaboration: Postman provides collaboration features, allowing teams to share collections and documentation, with workspaces for effective API project management. Additionally, it offers integration with CI/CD tools for automated testing and deployment.

 3. Mulesoft

MuleSoft’s Anypoint Platform is a cloud-based solution for API and integration development. Its API design features encompass:

  • API Designer: An API Designer offers both visual and code-based approaches for designing, documenting, and testing APIs in various languages.
  • Prebuilt and Reusable API Fragments: MuleSoft provides a library of prebuilt API fragments that can be customized to meet specific requirements.
  • Support for Various API Specification Languages: MuleSoft supports RAML, OAS, AsyncAPI, and GraphQL.
  • Mocking Service: Validation of APIs with simulated behavior before deployment to production is possible.
  • API Console: An auto-generated documentation feature helps users understand and utilize the APIs.
  • Anypoint Exchange: This allows sharing APIs with the Anypoint Exchange community for collaboration and reuse.

4. FastAPI

FastAPI is a modern web framework for building APIs in Python 3.8+ with a focus on ease of use and compatibility with open standards like OpenAPI and JSON Schema. Key API design features include:

  • OpenAPI Support: Full compatibility with OpenAPI, enabling automatic documentation generation and code generation from API definitions.
  • Dependency Injection: Supports dependency injection for modular and reusable code.
  • Security and Authentication: Offers features like API key support, OAuth2, and OpenID Connect for securing APIs.
  • Path Parameters, Query Parameters, and Body Requests: Simplifies the definition of API endpoints with various parameter types.
  • Response Models: Enables the definition of response models for well-documented and consistent APIs.
  • Error Handling: Provides tools for efficient error handling, including support for custom exception classes and global error handlers.

5. Apiary

Apiary.io is a cloud-based platform for API design, documentation, and testing, primarily utilizing the API Blueprint specification. Its key features include:

  • API Blueprint Support: Full support for the API Blueprint specification, which uses a lightweight markdown-based format for API descriptions.
  • Mock API Generation: Apiary can generate mock APIs for testing and development, simulating real-world API interactions.
  • Command Line Tools: The Apiary CLI Gem offers various commands to verify, preview, share, and incorporate Apiary features into workflows.
  • API Documentation: Apiary can generate API documentation in formats like HTML, PDF, and Markdown, providing information about endpoints, parameters, and responses.

6. SwaggerHub

SwaggerHub is an integrated cloud-based platform for API design, documentation, and collaboration, based on the OpenAPI and AsyncAPI specifications. Its key features include:

  • API Editor: An API editor with syntax auto-completion and error feedback for designing APIs in OpenAPI format.
  • Style Validators: This feature allows users to maintain design consistency across multiple APIs through standard naming conventions, data models, and other design elements.
  • API Mocking: You can conduct API mocking without writing code for testing and feedback.
  • Domains: Domains enable the definition of reusable components like data models, security schemes, and servers, reducing duplication and enhancing efficiency.

7. Apollo GraphQL

Apollo GraphQL offers an open-source platform for building modern GraphQL APIs and clients. Key features include:

  • Client-Driven Schema Design: Clients can specify their data requirements that allows the server to deliver data as needed, eliminating over-fetching or under-fetching.
  • Nested Queries and Mutations: Apollo supports nested queries and mutations which improves API performance and reduces the number of requests.
  • Fragmented Queries and Mutations: Enables the reuse of common query and mutation fragments.
  • Introspection: Allows clients to discover schema capabilities at runtime, aiding in debugging and feature exploration.
  • Authentication and Authorization: Built-in support for authentication and authorization to protect APIs from unauthorized access.

8. Stoplight

Stoplight is an API design and documentation management tool that supports a design-first workflow, offering features such as:

  • Design-First Workflow: Allows API design in OpenAPI or JSON Schema before coding, ensuring well-designed APIs that meet user needs.
  • Central Source of Truth: Provides a central repository for all API documentation, ensuring consistency and up-to-date information.
  • Collaboration Tools: Offers real-time editing, comments, and version control for effective teamwork on API design and documentation.
  • Validation and Linting: Validates OpenAPI and JSON Schema documents to ensure they conform to best practices.
  • Documentation Generation: Automatically generates API documentation in various formats, including Markdown, HTML, and PDF.

Choosing the Right API Design Tool for Your Needs

With so many options available, choosing the right API design tool can be tricky. Here are some tips you should follow to make an informed choice:

Assessing Your Development Requirements

Start by assessing your team’s development requirements. Consider the size of your team, the complexity of your projects, and the specific features you need. Are you working with a small team or a large organization? Do you require advanced collaboration features or simple design capabilities? These questions will help you determine your needs’ scope and narrow the options.

Additionally, it’s important to consider the scalability and extensibility of the tool. As your projects grow and evolve, you may need a tool that can accommodate increasing complexity and adapt to changing requirements. Look for a tool that offers flexibility and can support your future development needs.

Make a list of your must-have features and prioritize them based on their importance. This will serve as a guide when comparing different API design tools.

Comparing Different API Design Tools

Next, compare different API design tools based on your requirements. Take advantage of free trials and demos to get hands-on experience with each tool. This will allow you to assess their user interface, ease of use, and overall functionality.

Pay attention to how well the tools align with your priorities and whether they meet your team’s needs. Look for features such as intuitive design editors, code generation capabilities, automatic documentation generation, and support for popular programming languages and frameworks. Consider how well the tools integrate with your existing development ecosystem, as seamless integration can greatly enhance productivity.

Furthermore, consider the tool’s learning curve and the availability of resources such as tutorials, documentation, and community support. A tool that offers comprehensive resources can help your team quickly get up to speed and maximize their productivity.

Making the Final Decision

Once you have compared the options, decide based on your evaluation. Consider factors such as pricing, support, and future growth potential. Evaluate the tool’s pricing model and determine whether it aligns with your budget and long-term plans.

It may also be helpful to seek feedback from other teams or industry professionals who have experience with the tools you are considering. Their insights can provide valuable perspectives and help you make a more informed decision.

Remember that choosing an API design tool is not a one-size-fits-all approach. Each team may have different requirements and preferences. Take the time to carefully evaluate your needs and prioritize the most important features to your team’s success.


Good API design not only accelerates the development process but also contributes to the overall stability and longevity of software applications.

Astera, with its exhaustive features, intuitive interface, and extensive connectivity options, emerges as a top choice for everyone looking for a top-notch API design tool.

Experience how Astera’s API design tool can make building APIs easier and quicker. Download our 14-day free trial, or sign up for a free demo today!

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