Mitm Find Pii

Organization

instavm

mitm-find-pii

Find PII (Personally Identifiable Information) leakage in API responses. Use when user asks about data exposure, privacy issues, or sensitive data in traffic.

Overview

Publisher	instavm
Repository	`security-skills`
Skill name	`mitm-find-pii`
Stars	88
Forks	12
Bundled files	Instructions only
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
Self-contained
Everything the model needs lives in the instructions — no extra files to sync.
Open source
Published by instavm on GitHub. Read the source before you install it.

Installation

Install the Mitm Find Pii AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/instavm/security-skills/tree/main/skills/mitm-find-pii
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/instavm/security-skills.git /tmp/security-skills
mkdir -p .claude/skills
cp -r /tmp/security-skills/skills/mitm-find-pii .claude/skills/mitm-find-pii

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Mitm Find Pii in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Mitm Find Pii on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Mitm Find Pii is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Find PII Leakage

Analyze the mitmproxy dump (log.txt) for PII exposure for: $ARGUMENTS

Requires: log.txt in the current directory. If it's missing, capture traffic first:

bash
mitmdump --set flow_detail=3 2>&1 | tee log.txt

PII Categories to Check

1. Contact Information

Email addresses in responses
Phone numbers (full or partial)
Physical addresses

2. Financial Data

Credit card numbers (even partial)
Bank account details
Transaction amounts
Payment tokens

3. Identity Information

Full names
Date of birth
Gender
PAN/SSN/ID numbers

4. Authentication Data

Passwords (plain or hashed)
OTPs in responses
Session tokens
API keys

5. Behavioral Data

Purchase history
Browsing patterns
Location data (lat/long)

Red Flags

PII returned without authentication
PII in error responses
PII leaked to third-party domains
PII in GET parameters (logged in server logs)
Unmasked data where masking expected

Output Format

For each finding:

Endpoint: Where PII is exposed
Data Type: What PII is leaked
Sample: Redacted example
Context: Authenticated/Unauthenticated
Severity: Based on sensitivity
Fix: Mask, remove, or restrict access

Frequently asked questions

What does the Mitm Find Pii AI skill do?

Find PII (Personally Identifiable Information) leakage in API responses. Use when user asks about data exposure, privacy issues, or sensitive data in traffic.

Why use Mitm Find Pii on TypingMind?

Because you install it once and use it with any model. Mitm Find Pii is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Mitm Find Pii in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/instavm/security-skills/tree/main/skills/mitm-find-pii. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Mitm Find Pii?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Mitm Find Pii?

As many as you like. As long as a model supports skills, you can use Mitm Find Pii with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Mitm Find Pii AI skill free?

It is published on GitHub by instavm. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Find PII Leakage

PII Categories to Check

1. Contact Information

2. Financial Data

3. Identity Information

4. Authentication Data

5. Behavioral Data

Red Flags

Output Format

Frequently asked questions

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