API Testing

Automated API Testing Tools for Complex Applications

Test APIs, integrations, and business workflows across modern enterprise architectures. Combine API test automation with service virtualization, test environment management, code coverage, and test impact analysis to test continuously as applications change.

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Test APIs Across Connected Systems

Modern applications rely on interconnected APIs, microservices, messaging systems, databases, and third-party dependencies. Validating workflows across these systems requires testing how components interact, managing dependencies that may be unavailable or unstable, and ensuring consistent test conditions.

Parasoft combines API test automation, service virtualization, test environment management, and application-level quality insights to support continuous testing across complex architectures.

Find the Right Solution for Your API Testing Needs

SOAtest

Create & Execute API Tests

Automate API and integration testing across REST, SOAP, GraphQL, gRPC, Kafka, JMS, and IBM MQ, with support for over 120 + protocols and message formats.

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Virtualize

Mock APIs & Simulate Dependencies

Create API mocks and virtual services for unavailable or constrained dependencies to simulate realistic behavior, including stateful transactions, errors, latency, and hard-to-reproduce conditions.

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CTP

Manage Test Environments

Configure, provision, and manage reusable test environments that combine real and virtual services, test data, and execution configurations to support consistent, repeatable testing.

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DTP

Measure Test Coverage

Collect coverage from API and functional tests to identify code coverage gaps and understand how thoroughly the application has been tested.

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Test data slowing you down?

Create and manage realistic virtual test data with Parasoft Virtualize.

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How Parasoft API Testing Works

From Test Creation to Application-Level Insights

Create API tests, control dependencies and environments, execute continuously, focus testing based on code changes, and measure application code coverage.

Workflow illustrating how AI generates executable API tests from requirements, API definitions, and recorded traffic, including assertions and test data.

Create

Build reusable API tests from service definitions, requirements, traffic, or request-response pairs. Use AI-driven and agentic workflows to generate tests, assertions, and test data.

Diagram illustrating Parasoft SOAtest executing API tests against an application using both real dependencies and simulated dependencies created with Parasoft Virtualize, including microservices, databases, third-party services, and legacy systems.

Control

Create API mocks and virtual services, including stateful behavior, for unavailable or constrained dependencies. Use AI and agentic workflows to accelerate creation, and configure reusable test environments.

llustration highlighting four types of API testing: functional testing, regression testing, performance testing, and security testing.

Execute

Run API tests continuously in CI/CD pipelines and across managed environments. Reuse scenarios for regression, performance, and security testing.

Diagram illustrating change-based testing, showing how code changes identify impacted code and prioritize API and functional tests, running 12 affected tests while skipping 48 unaffected tests to improve testing efficiency.

Focus

Use test impact analysis to identify which tests are affected by code changes and which still need to run to validate them.

Diagram showing API, microservices, and functional tests contributing to 78% overall application coverage, with individual service coverage metrics.

Measure

Capture application code coverage from API and functional tests to see which code has and hasn’t been exercised, and identify testing gaps.

SOAtest

API Test Creation & Automation

Virtualize

Mocking & Service Virtualization

CTP

Test Environments & Data

SOAtest

Test Execution

CTP

Test Environment Orchestration

DTP

Code Coverage Analysis

CTP

Change Intelligence

CTP

Coverage Collection

DTP

Coverage Analysis & Insights

Continuous Testing

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Business Value That Goes Beyond Test Creation

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Lower Costs

Reduce Testing Costs & Operational Overhead

Catch defects earlier, before they become costly to fix. Use service virtualization to cut infrastructure expenses and third-party dependency costs.

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Scale AI

Standardize AI-Driven Testing Enterprise-Wide

Give nonprogrammer QA teams reusable low-code/no-code test assets they can share and maintain with consistent, deterministic execution across projects.

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Release Faster

Accelerate Software Delivery With Confidence

Remove delays of limited test data, and unavailable environments. Use coverage and quality insights to make informed release decisions.

Accelerate API Testing With AI

Evolve past individual AI-assisted tasks with AI-driven and agentic workflows so teams can validate APIs faster with less manual effort.

Create Tests With AI

Generate API tests, test data from requirements, service definitions, written descriptions, and other testing context.
Build Virtual Services With AI

Accelerate API mocking and service virtualization, including stateful virtual services for complex dependencies.
Enable Agentic API Testing

Connect AI agents to SOAtest and Virtualize through MCP and provided skills so they can complete multi-step testing workflows with proven capabilities.

Diagram illustrating AI-powered API testing and service virtualization with Parasoft SOAtest and Virtualize, showing an automated workflow from test creation and execution to virtual service generation and results evaluation, powered by MCP and Parasoft Skills.

Explore AI/ML Solutions

See AI-powered and agentic API testing workflows in action.

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API Performance & Security Testing

Reuse functional API tests to evaluate performance and security without rebuilding test scenarios from scratch.

Performance Testing

Turn functional API tests into load and performance scenarios to evaluate response times, scalability, and behavior under load.

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Security Testing

Reuse existing API tests for early API security penetration testing to identify vulnerabilities and validate API responses to malicious or unexpected inputs.

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