@mcp-use/inspector
MCP ServerFreeMCP Inspector - A tool for inspecting and debugging MCP servers
Capabilities8 decomposed
mcp server introspection and schema discovery
Medium confidenceAutomatically discovers and displays the complete schema of connected MCP servers, including available tools, resources, and prompts with their input/output specifications. Uses the MCP protocol's introspection endpoints to fetch server capabilities and metadata without requiring manual documentation parsing or server-specific knowledge.
Provides real-time schema introspection directly via MCP protocol rather than requiring separate documentation or manual schema definition, enabling dynamic discovery of server capabilities at runtime
More accurate than reading static documentation because it queries live server state, and faster than manual schema inspection because it automates the discovery process
interactive mcp tool invocation and testing
Medium confidenceProvides an interactive interface to call MCP server tools with custom parameters, execute them, and inspect their responses in real-time. Handles parameter validation against the tool's JSON schema, formats requests according to MCP protocol specifications, and displays structured responses with error handling and debugging information.
Combines schema-based parameter validation with live tool execution in a single interactive interface, eliminating the need to write separate test harnesses or manually construct MCP protocol messages
Faster iteration than writing unit tests because it provides immediate feedback, and more reliable than curl-based testing because it handles MCP protocol details automatically
mcp resource browsing and content retrieval
Medium confidenceEnables browsing of resources exposed by MCP servers (files, documents, data objects) and retrieves their content through the MCP resource protocol. Displays resource hierarchies, metadata, and handles streaming or chunked content delivery for large resources, with support for filtering and searching resources by name or type.
Provides unified resource browsing across heterogeneous MCP servers through a consistent interface, abstracting away server-specific resource protocols and handling streaming/pagination transparently
More flexible than direct file system access because it works with any MCP-compliant resource provider, and more discoverable than API documentation because resources are browsable in real-time
mcp prompt template inspection and execution
Medium confidenceDisplays available prompt templates from MCP servers, shows their parameters and descriptions, and allows executing prompts with custom arguments. Handles prompt variable substitution, formats prompt requests according to MCP specifications, and returns rendered prompt content or structured prompt responses for use in downstream applications.
Centralizes prompt template discovery and execution through MCP protocol, enabling version-controlled, server-managed prompt libraries that can be shared across multiple applications without duplication
More maintainable than hardcoded prompts because templates are managed server-side, and more discoverable than scattered prompt files because they're exposed through a standard interface
mcp server connection management and lifecycle control
Medium confidenceManages connections to MCP servers including establishing connections via stdio, HTTP, or SSE transports, monitoring connection health, handling reconnection logic, and gracefully shutting down connections. Provides connection status monitoring, error reporting, and automatic recovery from transient failures with configurable retry strategies.
Abstracts MCP transport details (stdio, HTTP, SSE) behind a unified connection interface with built-in health monitoring and automatic reconnection, eliminating transport-specific boilerplate in client applications
More robust than manual connection handling because it includes automatic reconnection and health monitoring, and more flexible than hardcoded connections because it supports multiple transport types
mcp protocol message inspection and logging
Medium confidenceCaptures and displays all MCP protocol messages (requests, responses, notifications) flowing between client and server in real-time. Provides formatted message display with syntax highlighting, filtering by message type or direction, and detailed logging of protocol-level events including timing information, message sizes, and error details for debugging protocol compliance issues.
Provides transparent protocol-level message inspection without requiring server modifications or proxy setup, capturing the complete MCP message flow with timing and metadata for deep protocol analysis
More detailed than application-level logging because it shows raw protocol messages, and easier to set up than network packet capture because it's built into the inspector
mcp server performance profiling and metrics collection
Medium confidenceCollects performance metrics from MCP server interactions including tool execution time, resource retrieval latency, message round-trip time, and throughput statistics. Aggregates metrics over time, provides statistical summaries (min, max, average, percentiles), and identifies performance bottlenecks or slow operations for optimization analysis.
Automatically collects end-to-end performance metrics for all MCP operations without requiring manual instrumentation, providing statistical analysis and trend detection out of the box
More comprehensive than manual timing because it tracks all operations automatically, and more accessible than APM tools because it's built into the inspector without external dependencies
mcp error handling and diagnostic reporting
Medium confidenceCaptures and analyzes errors from MCP server interactions, providing detailed error context including error type, message, stack traces, and the operation that triggered the error. Generates diagnostic reports with suggestions for resolution, categorizes errors by type (protocol, timeout, validation, server error), and tracks error patterns over time.
Provides intelligent error categorization and diagnostic suggestions specific to MCP protocol issues, going beyond raw error messages to help developers understand root causes and resolution paths
More actionable than generic error logs because it provides MCP-specific context and suggestions, and more efficient than manual debugging because it automatically categorizes and analyzes error patterns
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 @mcp-use/inspector, ranked by overlap. Discovered automatically through the match graph.
@wong2/mcp-cli
A CLI inspector for the Model Context Protocol
@modelcontextprotocol/inspector-server
Server-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.
OpenMCP Client
** - An all-in-one vscode/trae/cursor plugin for MCP server debugging. [Document](https://kirigaya.cn/openmcp/) & [OpenMCP SDK](https://kirigaya.cn/openmcp/sdk-tutorial/).
@modelcontextprotocol/inspector
Model Context Protocol inspector
@modelcontextprotocol/inspector-client
Client-side application for the Model Context Protocol inspector
Best For
- ✓MCP server developers building and testing new servers
- ✓Integration engineers connecting multiple MCP servers to applications
- ✓Teams debugging MCP protocol compliance issues
- ✓MCP server developers testing tool implementations during development
- ✓Integration engineers validating tool behavior before production deployment
- ✓Developers troubleshooting tool integration issues without writing test code
- ✓Developers integrating MCP servers that expose file systems or document stores
- ✓Teams auditing what data is accessible through MCP servers
Known Limitations
- ⚠Only works with MCP-compliant servers; non-MCP tools cannot be inspected
- ⚠Requires active server connection; cannot inspect offline or unreachable servers
- ⚠Schema discovery latency depends on server response time and network conditions
- ⚠Interactive testing only; no batch execution or automated test suite generation
- ⚠Parameter validation is schema-based but may not catch semantic errors in tool logic
- ⚠Response inspection is limited to what the MCP server returns; cannot intercept or modify responses
Requirements
Input / Output
UnfragileRank
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MCP Inspector - A tool for inspecting and debugging MCP servers
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