ATA
ATA is an AI-powered API management platform that centralizes design, testing, governance, documentation, and lifecycle workflows into a single intelligent workspace to help teams design, build, test, maintain, and govern APIs with higher quality and collaboration. It keeps API code, design documentation, specifications, test cases, and release notes in sync, reducing manual effort and drift while supporting OpenAPI specs, mock servers for frontend progress without backend readiness, and scheduled API monitoring to detect slow responses, timeouts, or failures early. It includes a Developer Studio for design-first OpenAPI creation and version control, E2E Test Automation with AI-generated robustness and security tests, mock servers, chained API workflows, and UI automation testing, and a Documentation Portal that centralizes API docs with multi-editor support, version management, secure access control, and auto-linked live endpoints.
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Autostub
AutoStub® is an essential tool to speed up API development. It can significantly reduce your build time by quickly designing, prototyping, documenting and testing APIs. AutoStub® creates a functional mock that allows developers to work with APIs before they are fully implemented.
Available as a SaaS offering, for On-Premise deployments and in a hybrid model.
Key Features
Simulate ReST and SOAP services
Input format - Swagger files for ReST, WSDL files for SOAP services
Support for GET, POST, PUT, DELETE methods in ReST
Create WSDL/Swagger 2.0 based mock services; generate dummy data for API testing
Get an endpoint URL that can be used on a third party SOAP client tool
Improves quality by facilitating functional testing
Can handle multiple test scenarios together
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Postman
The collaboration platform for API development. Simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Postman is a collaboration platform for API development. Postman's features simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Quickly and easily send REST, SOAP, and GraphQL requests directly within Postman. Automate manual tests and integrate them into your CI/CD pipeline to ensure that any code changes won't break the API in production. Communicate the expected behavior of an API by simulating endpoints and their responses without having to set up a backend server. Generate and publish beautiful, machine-readable documentation to make your API easier to consume. Stay up-to-date on the health of your API by checking performance and response times at scheduled intervals. Provide a shared context for building and consuming APIs, and collaborate in real-time.
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Specmatic
Specmatic offers a no-code, specification-driven, visual approach to API testing by leveraging API specifications to automatically execute positive and negative tests. Specmatic Studio offers broad format and protocol support across REST, SOAP, GraphQL, gRPC, WebSockets, and asynchronous messaging systems (message queues and event-driven APIs).
The platform provides a comprehensive toolkit for API development and testing, utilizing specs as the single source of truth.
Key features include:
• Contract testing across various protocols
• Service virtualization and mocking
• Workflow and resiliency testing
• Backward compatibility checks to prevent breaking changes
• Open-source testing tools for OpenAPI, MCP and SOAP
• Postman collection import for spec creation
Specmatic focuses on functional correctness, contract compliance, resiliency, and compatibility testing.
Genie assists API design, enabling interactive validation of the API spec prior to generating an MCP server.
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