MCP Sniffer

MCP Sniffer captures network traffic between MCP clients and servers and displays it in a web UI.

→ shivdeepak/mcp-sniffer · listed on mcp_so

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find.

Install from

mcp.so

M8ven verifies MCPs across every public registry — install directly from whichever one you prefer.

// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configLISTEN_HOST— usage: mcp-sniffer [-h] [--listen-host ] [--listen-port LISTEN_PORT] [--upstream-host UPSTREAM_HOST]

configLISTEN_PORT— usage: mcp-sniffer [-h] [--listen-host LISTEN_HOST] [--listen-port ] [--upstream-host UPSTREAM_HOST]

configUPSTREAM_HOST— usage: mcp-sniffer [-h] [--listen-host LISTEN_HOST] [--listen-port LISTEN_PORT] [--upstream-host ]

configUPSTREAM_PORT— [--upstream-port ] [--web-ui-host WEB_UI_HOST] [--web-ui-port WEB_UI_PORT]

configWEB_UI_HOST— [--upstream-port UPSTREAM_PORT] [--web-ui-host ] [--web-ui-port WEB_UI_PORT]

configWEB_UI_PORT— [--upstream-port UPSTREAM_PORT] [--web-ui-host WEB_UI_HOST] [--web-ui-port ]

configLOG_LEVEL— [--log-level ]

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/shivdeepak-mcp-sniffer-ed24tr)](https://m8ven.ai/mcp/shivdeepak-mcp-sniffer-ed24tr)

commit: f054e0feaed41cfa1538a576888f38d96208fc7c

code hash: 7c637e7b4245049b723b1815139644a7808c05f04e9543111df4c30f77cec472

verified: 6/17/2026, 11:47:10 AM

view raw JSON →