Visual MCP server testing
Provides a visual testing interface for Model Context Protocol servers, helping developers examine server behavior without relying only on code or command-line output.
MCP Inspector
Freemium
MCP Inspector is an open-source visual testing tool for Model Context Protocol (MCP) servers. It is intended for developers who need to inspect and test MCP server behavior through a visual interface.
What is MCP Inspector?
MCP Inspector is a public, open-source GitHub project described as a visual testing tool for Model Context Protocol (MCP) servers. Its core purpose is to give developers a visual way to work with and test MCP server implementations.
The repository is structured around several application surfaces and supporting packages, including web, terminal UI, command-line, launcher, and core directories. It also includes documentation, specifications, scripts, and dedicated test-server resources, so the project functions as both a usable developer tool and a codebase for contributors.
The collected source confirms the product category and repository structure, but does not provide enough detail to state exact installation steps, supported connection types, test result formats, hosted deployment options, or product-specific pricing.
What can MCP Inspector do?
Multiple client surfaces
The repository contains separate web and terminal UI areas, indicating that the project supports more than one client-oriented interaction surface.
Command-line and launcher components
Dedicated CLI and launcher directories support the tooling around starting or invoking the inspector, although the collected pages do not document their exact commands or options.
Built-in test-server resources
A `test-servers` directory provides project test-server material for exercising the inspector and validating changes.
Contributor-oriented project structure
Documentation, specifications, scripts, core code, and client packages are organized as distinct repository areas for development and maintenance.
Use Cases
“Developing an MCP server”
Use the inspector as a visual aid while building an MCP server, with the goal of examining how the server behaves during development.
“Checking changes before contribution”
Developers contributing to the public repository can use the client surfaces and test-server resources to exercise changes alongside the project’s core and supporting code.
“Comparing interaction surfaces”
Teams or individual developers evaluating how to work with the tool can review its web and terminal UI components as distinct client-oriented surfaces.
“Working directly from the source repository”
MCP developers who need to inspect implementation details can use the repository’s documentation, specifications, scripts, and core packages as part of a source-based workflow.
Frequently Asked Questions
What is MCP Inspector?
MCP Inspector is a visual testing tool for Model Context Protocol servers. It is distributed as a public project on GitHub.
Who is MCP Inspector for?
It is intended for developers building, testing, or contributing to MCP server projects.
Does the project include more than a web interface?
The repository contains web and terminal UI directories as well as CLI and launcher components, so the project includes multiple client and invocation surfaces.
Are test servers included?
Yes. The repository has a dedicated `test-servers` directory. The available source does not specify every fixture or the complete set of scenarios it covers.
Is MCP Inspector a paid hosted service?
The supplied evidence identifies it as a public GitHub repository but does not provide product-specific pricing or confirm a hosted service offering. GitHub’s general pricing page should not be treated as pricing for MCP Inspector.
Quick Facts
- Category
- Developer Tool
- Primary purpose
- Visual testing for MCP servers
- Distribution
- Public GitHub repository
- Project surfaces
- Web, terminal UI, CLI, launcher, and core components
- Repository resources
- Documentation, specifications, scripts, and test servers
- Source domain
- github.com
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