MCPJam Inspector
Development platform to debug, chat, inspect, and evaluate MCP servers and MCP apps. 1,940 GitHub stars and 100 commits on main in the last 30 days.
“Development platform to debug, chat, inspect, and evaluate MCP servers and MCP apps. 1,940 stars and 100 commits on main in the last 30 days.”
INSTALL THIS SERVER
{
"mcpServers": {
"mcpjam-inspector": {
"command": "npx",
"args": [
"-y",
"@mcpjam/inspector"
]
}
}
}
{
"mcpServers": {
"mcpjam-inspector": {
"command": "npx",
"args": [
"-y",
"@mcpjam/inspector"
]
}
}
}
{
"mcpServers": {
"mcpjam-inspector": {
"command": "npx",
"args": [
"-y",
"@mcpjam/inspector"
]
}
}
}
{
"mcpServers": {
"mcpjam-inspector": {
"command": "npx",
"args": [
"-y",
"@mcpjam/inspector"
]
}
}
}
{
"mcpServers": {
"mcpjam-inspector": {
"command": "npx",
"args": [
"-y",
"@mcpjam/inspector"
]
}
}
}
6 TOOLS AVAILABLE
OUR ASSESSMENT
- 1,940 GitHub stars.
- 100 commits on main in the last 30 days.
- Chat and evaluation features beyond the official inspector.
- Active community development.
- Transport inspection helps diagnose stdio/HTTP issues.
- Dual-licensed: `server/services/` directories and `server/routes/mcp/evals.ts` are under a separate commercial license, not Apache-2.0.
- gh api reports NOASSERTION for the spdx_id because of the mixed-licence structure.
- Community-maintained; feature parity with the official inspector is a moving target.
- Connecting to a production MCP server requires careful credential handling.
No authentication for the Inspector. Connecting to a production MCP server passes through your credentials; treat the Inspector session as having the same access as the connected server. For debugging, prefer a non-production MCP target. Licence caveat: code in `server/services/` directories and `server/routes/mcp/evals.ts` is governed by a commercial licence (see `server/evals/LICENSE`) rather than Apache-2.0; review before redistribution or building derivative MCPs.
MCP server authors who want chat-based testing alongside protocol-level debugging; eval-driven dev where the agent runs a suite against an MCP; production debugging where inspection plus replay matters.
TECHNICAL DETAILS
ADOPTION METRICS
// Reading this1,940 stars on MCPJam/inspector. 100 commits on main in the last 30 days.
// Reading thisPairs with MCP Inspector, MCPHub, ToolHive, MCP Registry as MCP infrastructure. MCPJam owns the chat-plus-eval slot.
SOURCES & VERIFICATION
We don't take any single directory's word for it. Before scoring, we cross-reference 4 public MCP sources, install the server ourselves against the clients we cover, and record when we last re-verified.
The same server, 4 different lenses. We reconcile these signals into our editorial score, which is why our number sometimes diverges from a directory-aggregate star count.
| Source | Their rating | Their star count | Their downloads | Last synced |
|---|---|---|---|---|
| AutomationSwitch This page | 4.2editorial | 1,940 | — | MAY 12, 2026 |
| PulseMCP | — unrated | unavailable | unavailable | MAY 12, 2026 |
| MCP.so | — unrated | unavailable | unavailable | MAY 12, 2026 |
| Glama | — unrated | unavailable | unavailable | MAY 12, 2026 |
| Smithery | — unrated | unavailable | unavailable | MAY 12, 2026 |
// Counts are directory-reported; we don't adjust them. Discrepancies usually come from different snapshot times or star-caching.
OTHER DEV TOOLS MCP SERVERS
GitHub
Official GitHub MCP server. 29,469 stars, MIT, 33 commits on main in the last 30 days. Repo, issue, PR, action, and code search tools backed by the GitHub REST + GraphQL APIs.
Playwright
Official Microsoft Playwright MCP server. Browser automation tools (navigate, click, fill, screenshot, evaluate JS, network capture) backed by Playwright. 31,942 stars, 35 commits/30d, Apache-2.0.
FastMCP (Python)
The fast, Pythonic way to build MCP servers and clients. Maintained by PrefectHQ. 25,133 GitHub stars and 92 commits on main in the last 30 days. The dominant Python MCP framework.
Repomix
Pack the entire repository into a single AI-friendly file. Optimised context for feeding codebases to Claude, ChatGPT, Gemini, and others. 24,515 GitHub stars and 100 commits on main in the last 30 days.
Serena
Powerful MCP toolkit for coding. Provides semantic retrieval and editing capabilities, positioned as the IDE for the agent. 23,971 GitHub stars and 100 commits on main in the last 30 days.
Model Context Protocol Specification
The official specification and documentation for the Model Context Protocol. The source of truth for the protocol that every MCP server in this directory implements. 8,090 GitHub stars and 100 commits on main in the last 30 days.
DISCUSS YOUR
MCP REQUIREMENTS.
Evaluating a server, scoping an internal deployment, or working out whether MCP is the right fit at all. Start the conversation and we will point you at the right piece of the ecosystem.