
KlavisAI
Webrix
Composio.dev
Rowboat
PhonePi MCP
Mintlify
Aident.ai
Speakeasy
HttpMaster
Hoppscotch
API Fortress
Postman
Assertible
Request inspector
SoapSonar
CurlHub.io
Klavis AI is a Y Combinator (X25) backed startup providing open-source infrastructure for integrating Model Context Protocols (MCPs) into AI applications at scale. Founded by Xiangkai Zeng (ex-Google DeepMind, Gemini function calling) and Zihao Lin (ex-Lyft), we solve the critical challenges of tool connectivity, security, and scalability for AI agents. Our platform addresses key industry problems: the lack of built-in, user-based authentication in existing MCP servers and the instability of underdeveloped personal projects. Our flagship product, Strata, enables AI agents to handle thousands of tools through progressive discovery, preventing context overload. This approach is proven to improve agent accuracy on complex tasks by over 13%, achieving 83%+ accuracy on multi-app workflows. Klavis AI provides 100+ production-ready MCP servers with enterprise OAuth support for major services like GitHub, Slack, and Salesforce, with flexible deployment options including a hosted service, self-hosted Docker, SDKs (Python/TypeScript), and a direct REST API.
Core HttpMaster features are: * HttpMaster project to store complete definition of API calls in one single place. * Broad set of http properties. * Dynamic parameters to simulate variations of input data or create global API values. * Response data validation with logical expressions. * Request chaining to use data from previous request with the next request. * Extensive data upload support, including 'multipart/form-data'. * Request data builder for creating request body with an optional dynamic parameters. * Request item execution with detailed progress monitoring. * Execution groups to create batches of requests. * Comprehensive execution data review and management. * Additional tools (basic request tool for ad-hoc execution, command line interface, OpenAPI import, etc).
KlavisAI
HttpMasterHttpMaster is well-suited for developers, QA engineers, and testers who need to perform end-to-end testing of web APIs. It's particularly beneficial for those who require a versatile testing solution with both automated and manual testing features. It's also ideal for teams that need to validate the functionality, performance, and security of their web apps through an intuitive platform.
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HttpMaster's answer:
Developers and testers.
HttpMaster's answer:
HttpMaster's answer:
Performance, simple UI, resource friendly.
HttpMaster's answer:
Microsoft .NET.
Webrix - Providing a secure way for and enterprises to use and manage MCP tools.
Hoppscotch - Open source API development ecosystem
Composio.dev - Make Agents Actually Useful!
API Fortress - API performance, accuracy, and uptime testing. Without code.
Rowboat - Rowboat is a desktop app that turns your work into a living knowledge graph and uses it to accomplish tasks on your computer.
Postman - The Collaboration Platform for API Development