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Erodenn/fetch-guard

MCP Developer Tools

An MCP server and CLI tool that fetches URLs and returns clean, LLM‑ready markdown while detecting and stripping prompt injection attempts

Track releases GitHub
Python Latest v1.4.0 · 2mo ago Security brief →

Features

  • Sanitizes HTML by removing hidden elements, off‑screen content, and invisible Unicode characters before extraction
  • Runs multi‑phase pattern scanning (regex, NFKC normalization, homoglyph detection, decoding of base64/hex/URL encodings) to catch prompt injection attempts in text and metadata
  • Wraps output with a per‑invocation random salt to prevent spoofed wrapper boundaries

Recent releases

View all 8 releases →
Config change
v1.4.0 Breaking risk
Auth Breaking upgrade

auth_token replaces headers

Open
No immediate action
v1.3.0 Feature

headers param + status field + CLI

Open
Review required
v1.2.0 Breaking risk
RCE / SSRF

Injection detection + CSS sanitization

Open
Config change
v1.1.0 Breaking risk
Breaking upgrade

FetchError for oversized fetches

Open
No immediate action
v1.0.2 Bugfix

Docker Hub image fix

Open

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Install & Platforms

Install via
pip

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Beta — feedback welcome: [email protected]