MCPFlo is an open-source desktop application that provides a direct, deterministic way to test MCP (Model Context Protocol) servers. It allows users to call tools, read resources, and render prompts while viewing raw requests and responses, and supports writing persistent test scripts with assertions that run automatically. It serves as a "Bruno for MCP" for developers building or integrating with MCP servers, eliminating the need for throwaway scripts or reliance on AI intermediaries.
In the Developer Tools space, MCPFlo takes a focused approach. Manually testing and debugging Model Context Protocol (MCP) servers without reliable, repeatable, and version-controlled test scripts. It is built as an open-source project for developers. MCPFlo is open source under the MIT license. The product ships for the web, macOS, and the command line.
MCPFlo first shipped in 2026. Development happens publicly on GitHub with 12 stars and 199 commits in the last 90 days. Key capabilities include MCP Server Testing, Automated Assertions, and Git-Commitable Tests. It exposes integrations via an MCP server.
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I built an open-source "Bruno for MCP" - Desktop app for testing MCP servers with assertions you can commit to git verified by the PulseGate indexer
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