MockLab
Craft your simulation using the friendly, no-code UI or go fully automated with the 100% WireMock-compatible API. Simulate stateful behaviour in your mocked API using a simple finite state machine model. Test your app to destruction by injecting delays, dropped connections, drip-drip responses and corrupt HTTP payloads. A MockLab plan's collaborator limit is the total number of individual collaborators + team members that can be added by the owning account so e.g. if your subscription has a collaborator limit of 2, this means that you and 2 colleagues can work on your APIs. Test your app to destruction by injecting delays, dropped connections, drip-drip responses and corrupt HTTP payloads.
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Speedscale
AI bug repair from real production traffic, run entirely in your cloud. Speedscale captures HTTP, gRPC, and SQL traffic via eBPF inside your Kubernetes cluster. Production payloads never leave your perimeter.
When a failure occurs: the capture agent records the exact request, a triage agent classifies it, a reproduction agent replays it against your codebase, and a validation agent verifies the fix before the PR opens. Fully autonomous or human-gated.
You supply the cloud, storage, and AI models (Anthropic, Llama, or your own). Speedscale orchestrates the loop with no cloud, model, or storage lock-in.
proxymock: free CLI giving AI coding agents (Claude Code, Cursor, Copilot) real production context via MCP. No signup required.
Meets PCI and HIPAA data-residency requirements. Used by Home Depot, IHG, FLYR, Cimpress/Vistaprint, Navitaire, and Ascension Health.
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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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Beeceptor
Beeceptor is a high-performance, no-code platform that eliminates development bottlenecks through instant API mocking and real-time traffic inspection. Don't wait for backend teams to deploy; spin up a named subdomain in seconds and start integrating immediately.
Key Capabilities:
- Multi-Protocol Support: Simulate REST, SOAP, GraphQL, and gRPC endpoints without writing server-side code.
- AI-Powered Mocking: Use AI to generate realistic, contextually relevant test data or import OpenAPI/Swagger for CRUD-ready mocks.
- Chaos Engineering: Test "unhappy paths" by simulating latencies, timeouts, and rate limits.
- Local Tunneling & Proxying: Expose localhost via HTTPS and inspect live webhooks or mobile traffic in real-time.
Decouple your frontend and mobile teams, stabilize CI/CD by removing third-party dependencies, and go from API design to functional mock in minutes. Beeceptor scales from solo devs to enterprise-grade integration testing.
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