Gauntlet

What is Gauntlet?

Reliability + security testing for Model Context Protocol servers — mcp-fuzz (schema-aware fuzzer, SARIF) and mcp-storm (load tester, p50/p95/p99, CI gating) on one fast async MCP client core.

How to use Gauntlet?

The README includes setup instructions such as mcp-fuzz run --stdio -- node my-server.js.

Key features of Gauntlet

• type confusion (string where a number is required, …)
• boundary (empty / 100k-char strings, i64::MAX, negatives, zero, huge floats)
• missing required fields, wrong-typed arguments, deep nesting
• run: mcp-fuzz run --stdio --sarif mcp.sarif --fail-on high -- node server.js
• uses: github/codeql-action/upload-sarif@v3

Use cases of Gauntlet

• Connect an MCP-compatible client to this repository's service.
• Review the README-backed setup before enabling it in production.

FAQ from Gauntlet

Where is the source code for Gauntlet?

The source code is linked from the repository URL on this page.

Does Gauntlet include a standard MCP config?

If the README contains a parseable MCP configuration block, it is shown in the Config tab.