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fiddler-mcp

Verified Safe

by schwarztim

Overview

Intercept HTTP/HTTPS traffic, extract credentials, and replay/make requests for API debugging and reverse engineering.

Installation

Run Command
node dist/index.js

Security Notes

The MCP uses `mitmdump` with the `--set ssl_insecure=true` flag. This disables SSL/TLS certificate verification for upstream connections, which can make the proxy susceptible to Man-in-the-Middle attacks if used for general browsing on untrusted networks. However, for its stated purpose of development and API analysis, this is sometimes a necessary configuration. Captured flows and extracted credentials (API keys, tokens, cookies) are stored locally in unencrypted JSON files in `~/.fiddler-mcp/flows.json`. While this is an expected behavior for a tool of this nature, it means these files should be protected with appropriate system-level security, as their compromise could lead to credential leakage.

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Stats

Interest Score0
Security Score7
Cost ClassLow
Avg Tokens400
Stars0
Forks0
Last Update2026-01-16

Tags

HTTP proxyCredential extractionAPI debuggingTraffic capturemitmproxy