@wong2/mcp-cli
MCP ServerFreeA CLI inspector for the Model Context Protocol
Capabilities6 decomposed
mcp server introspection and schema discovery
Medium confidenceInspects running MCP servers to discover and display their available tools, resources, and prompts by querying the server's capabilities endpoint. Uses the MCP protocol's built-in introspection mechanisms to parse and present server schemas in a human-readable format, enabling developers to understand what a server exposes without reading documentation or source code.
Provides direct CLI-based introspection of MCP servers without requiring code changes or external tooling, leveraging the MCP protocol's native capability advertisement mechanism to dynamically discover tool schemas at runtime
Simpler and more direct than writing custom client code to inspect servers, and more accessible than reading server source code or documentation
interactive mcp tool invocation and testing
Medium confidenceAllows developers to call tools exposed by MCP servers directly from the CLI with interactive prompts for parameters, executing the tool and displaying results. Parses tool schemas to generate appropriate input prompts based on parameter types and requirements, handles JSON serialization/deserialization, and formats output for readability.
Provides an interactive CLI interface for tool invocation with automatic parameter prompting based on schema, eliminating the need to manually construct JSON payloads or write test client code
More user-friendly than raw curl/HTTP requests and faster than writing custom test scripts, while maintaining full compatibility with any MCP-compliant server
mcp server connection management and transport handling
Medium confidenceManages connections to MCP servers via multiple transport mechanisms (stdio, HTTP, WebSocket) with automatic protocol negotiation and error handling. Handles server lifecycle management including startup, shutdown, and connection state tracking, abstracting away transport-specific details from the CLI user.
Abstracts MCP transport complexity behind a unified CLI interface, automatically detecting and handling stdio, HTTP, and WebSocket transports without requiring users to specify transport details explicitly
More flexible than hardcoded transport implementations and easier to use than manually managing transport-specific connection code
mcp protocol validation and compliance checking
Medium confidenceValidates that MCP servers conform to the protocol specification by checking message format, capability advertisement, and response structure. Performs schema validation on tool definitions, resource declarations, and prompt templates to ensure they meet MCP requirements, providing detailed error messages for non-compliant implementations.
Provides automated protocol compliance checking specific to MCP servers, validating against the official MCP specification without requiring manual review or external validation tools
More thorough than manual inspection and more specific to MCP than generic JSON schema validators
mcp resource and prompt enumeration
Medium confidenceDiscovers and displays all resources and prompts exposed by an MCP server, including their metadata, templates, and usage patterns. Parses resource URIs and prompt definitions to present them in a structured, browsable format, enabling developers to understand what contextual data and prompt templates are available.
Provides dedicated enumeration of MCP resources and prompts as first-class CLI commands, treating them as discoverable artifacts separate from tools to highlight their role in context management
More discoverable than buried in generic capability listings and more accessible than querying the MCP protocol directly
mcp server output formatting and display customization
Medium confidenceFormats MCP server responses and introspection data in multiple output formats (JSON, YAML, table, formatted text) with customizable verbosity levels. Handles pretty-printing of complex nested structures, truncation of large outputs, and syntax highlighting for readability in terminal environments.
Provides multiple output format options with intelligent formatting for terminal display, allowing both human-readable inspection and machine-parseable output from a single CLI tool
More flexible than single-format output and more convenient than piping through external formatters like jq or yq
Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.
Related Artifactssharing capabilities
Artifacts that share capabilities with @wong2/mcp-cli, ranked by overlap. Discovered automatically through the match graph.
@modelcontextprotocol/inspector-server
Server-side application for the Model Context Protocol inspector
@mcp-use/inspector
MCP Inspector - A tool for inspecting and debugging MCP servers
@modelcontextprotocol/inspector
Model Context Protocol inspector
@modelcontextprotocol/inspector-client
Client-side application for the Model Context Protocol inspector
mcp-use
The fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.
@modelcontextprotocol/inspector-cli
CLI for the Model Context Protocol inspector
Best For
- ✓MCP server developers testing their implementations
- ✓Developers integrating MCP servers into LLM applications
- ✓Teams debugging MCP protocol communication issues
- ✓MCP server developers validating tool implementations
- ✓Integration testers verifying MCP server behavior
- ✓Developers prototyping MCP-based workflows
- ✓Developers testing MCP servers with different transport configurations
- ✓Teams standardizing MCP server deployment and testing
Known Limitations
- ⚠Only works with servers that implement the MCP capabilities discovery protocol
- ⚠Requires the MCP server to be running and accessible at the specified endpoint
- ⚠Does not validate tool execution or test actual server behavior, only schema inspection
- ⚠Interactive mode requires terminal input, not suitable for automation or CI/CD pipelines
- ⚠Complex nested parameter structures may be difficult to input interactively
- ⚠No built-in support for file uploads or binary data handling in interactive mode
Requirements
Input / Output
UnfragileRank
UnfragileRank is computed from adoption signals, documentation quality, ecosystem connectivity, match graph feedback, and freshness. No artifact can pay for a higher rank.
Package Details
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A CLI inspector for the Model Context Protocol
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