MCPJam Inspector is an open-source testing and evaluation platform for developers shipping MCP servers, MCP Apps and ChatGPT apps. It combines hosted, desktop, terminal and Docker workflows for connecting to HTTP/S and local STDIO servers, while its visual playground exposes tools, resources, prompts, app interfaces, JSON-RPC traces, OAuth exchanges and widget behavior. The CLI and SDK add stateless probing, direct tool calls, OAuth, MCP Apps and protocol conformance, cross-client evaluations and machine-readable CI reports so teams can detect regressions before release. MCPJam overlaps the official MCP Inspector for manual protocol inspection but extends the workflow toward client compatibility, evaluation history, collaboration and continuous quality gates; it is a separate product, repository and brand rather than a fork or repackage. Hosted usage has Community, Team and Enterprise tiers, while the Inspector repository is available under its documented Apache-2.0 terms. Anonymous CLI telemetry can be inspected or disabled. MCPJam is best for MCP teams that need repeatable compatibility, authentication and behavior evidence; teams seeking only a minimal official protocol debugger may prefer MCP Inspector.
MCPJam Inspector
Test and debug MCP servers before they ship
Open-source platform for inspecting, debugging and regression-testing MCP servers, MCP Apps and ChatGPT apps, with OAuth and protocol conformance for local and CI workflows.
Pricing
Community is $0/month with 200 credits/day and 25 eval iterations/day. Team is listed at $30 per seat/month billed annually, with 10,000 credits per seat/month and 5,000 eval iterations/month; Enterprise is custom with an annual commitment. The open-source Inspector can be self-run under its documented Apache-2.0 terms, but infrastructure and model-provider costs may apply.
Platforms
Hosted HTTPS web app, macOS and Windows desktop apps, local terminal Inspector for HTTP/S and STDIO, Docker, plus CLI and SDK paths for CI/CD. The hosted app does not cover local STDIO, tunneling, local skills or tasks.
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Tags
Use Cases
Alternatives
MCP Inspector
Official debugger for MCP server development
MCP Inspector is the official interactive developer tool from the Model Context Protocol team for testing, debugging, and validating MCP servers. It provides a visual interface to inspect available tools, test transport configurations, export configs for different clients, and verify protocol compliance during MCP server development.
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MCP-Scan is a security tool that scans MCP servers for vulnerabilities including tool poisoning, prompt injection, cross-origin escalation, and rug pull attacks. Acquired by Snyk in 2026, it is the first dedicated security scanner for the MCP ecosystem. It analyzes tool descriptions, permissions, and behavior patterns to detect malicious or compromised MCP servers before they can exploit AI agents.
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