Specmatic

Specmatic offers a no-code, specification-driven, and 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).

Specmatic Studio utilizes specifications as the single source of truth for contract testing, service virtualization (mocking), workflow testing and resiliency testing. It enables backward compatibility testing which detects breaking changes to APIs at design time and in CI, helping teams prevent consumer-impacting regressions before deployment.

Specmatic Genie uses API requirements to assist with API design and enables interactive validation of the API specification prior to generating an MCP server. Specmatic MCP Auto-Test generates test cases for JSON validation and tool calls.

Specmatic focuses on functional correctness, contract compliance, resiliency, and compatibility testing. It offers open-source testing tools for OpenAPI, MCP and SOAP. Postman collections can be imported to aid specification creation and test generation. Specmatic does not provide load-based performance testing or vulnerability scanning typically associated with dedicated performance or security testing tools.

Broad Specification Support Specmatic is language agnostic and supports OpenAPI/Swagger, AsyncAPI, GraphQL, gRPC, WSDL/Soap, gRPC/protobuf and Arazzo specifications as well as Avro, HTTP (REST), JMS, Redis, Kafka, JDBC, Google Pub/Sub RabbitMQ and gRPC protocols.

Key Features and Benefits:

• Visual Contract Testing: Automatically generates and executes comprehensive API tests from specifications (OpenAPI, AsyncAPI, GraphQL, gRPC, WSDL, Arazzo) without requiring code, enabling cross-functional teams to participate in API quality assurance

• Intelligent Service Virtualization: Creates realistic API mocks based on specifications with fault injection capabilities, allowing teams to test against dependencies and simulate error conditions like timeouts and service failures

• Backward Compatibility Validation: Integrates with Pull/Merge Request workflows to identify breaking changes before code implementation, preventing integration issues from reaching production environments

• Multi-Protocol Support: Supports diverse API specifications and communication protocols including HTTP (REST), Kafka, JMS, Google Pub/Sub, SOAP, JDBC, RESP (Redis), and Avro in a language-agnostic manner

• Organizational API Governance: Provides service mesh visualization, contract adoption tracking, and integration health monitoring through centralised dashboards that aggregate data from multiple development environments