ClaudSkills / Security / network-security

API Mitmproxy

Q: What is a Claude Code skill and how does the API Mitmproxy skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. API Mitmproxy is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: network-security · Last updated: 2026-05-21

lang:python type:integration

Interactive HTTPS proxy for API security testing with traffic interception, modification, and replay capabilities. Supports HTTP/1, HTTP/2, HTTP/3, WebSockets, and TLS-protected protocols. Includes Python scripting API for automation and multiple interfaces (console, web, CLI). Use when: (1) Intercepting and analyzing API traffic for security testing, (2) Modifying HTTP/HTTPS requests and responses to test API behavior, (3) Recording and replaying API traffic for testing, (4) Debugging mobile app or thick client API communications, (5) Automating API security tests with Python scripts, (6) Exporting traffic in HAR format for analysis.

About this skill (catalog notes)

API Mitmproxy includes a dedicated installation section; pricing or quota commentary; 17 code blocks for direct copy-paste. At roughly 1,689 words the SKILL.md is on the longer end of the catalog distribution.

Original author: SirAppSec
Indexed lastmod: 2026-05-21
Catalog position: Security · network-security
Indexed related skills: 10

How API Mitmproxy fits the catalog

API Mitmproxy sits in the Security category under the network-security sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

What this skill does

API Mitmproxy is a community-contributed Claude Code skill in the network-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/api-mitmproxy/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when: (1) Intercepting and analyzing API traffic for security testing, (2) Modifying HTTP/HTTPS requests and responses to test API behavior, (3) Recording and replaying API traffic for testing, (4) Debugging mobile app or thick client API communications, (5) Automating API security tests with Python scripts, (6) Exporting traffic in HAR format for analysis.

Who uses this skill

The API Mitmproxy Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/api-mitmproxy
curl -L https://claudskills.com/skills/api-mitmproxy/SKILL.md \
  -o ~/.claude/skills/api-mitmproxy/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/api-mitmproxy/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/api-mitmproxy/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\api-mitmproxy\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the API Mitmproxy Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/api-mitmproxy/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the API Mitmproxy skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the API Mitmproxy skill?

Use API Mitmproxy when your Claude Code task falls under the Security category — specifically in the network security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use API Mitmproxy" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the API Mitmproxy skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. API Mitmproxy is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/mitmproxy/mitmproxy
Author: SirAppSec

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

SirAppSec. (2026). API Mitmproxy [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/api-mitmproxy/

BibTeX

@misc{api-mitmproxy-2026,
  author    = {SirAppSec},
  title     = {API Mitmproxy [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/api-mitmproxy/}
}

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Badge

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