api-mitmproxy

api-mitmproxy is a skill for Claude Code, Codex from AgentSecOps/SecOpsAgentKit. It costs 142 tokens per session (3,529 once invoked), scanned B, original, no licence file.

An interactive proxy for inspecting HTTPS and other network traffic between an API client and server. It can intercept, change, and replay requests, including traffic protected by TLS.

In plain words
What is it for?
Analyzing and modifying HTTP/1, HTTP/2, HTTP/3, WebSocket, and TLS traffic, with console, web, and command-line interfaces plus Python scripting for automation.
Why use it?
It lets developers examine what an API actually sends and receives, including cases that are hard to understand from code alone. Replaying modified traffic helps test how the API handles it.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Analyzing and modifying HTTP/1, HTTP/2, HTTP/3, WebSocket, and TLS traffic, with console, web, and command-line interfaces plus Python scripting for automation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/agentsecops/secopsagentkit/api-mitmproxy
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add AgentSecOps/SecOpsAgentKit --skill api-mitmproxy
Clone the repo
git clone --depth 1 https://github.com/AgentSecOps/SecOpsAgentKit

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for api-mitmproxy

README.md
[![agentmods](https://agentmods.dev/badge/skills/agentsecops/secopsagentkit/api-mitmproxy/github.svg)](https://agentmods.dev/skills/agentsecops/secopsagentkit/api-mitmproxy)
Your own site
<a href="https://agentmods.dev/skills/agentsecops/secopsagentkit/api-mitmproxy"><img src="https://agentmods.dev/badge/skills/agentsecops/secopsagentkit/api-mitmproxy/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for api-mitmproxy

Your own site · 80×15
<a href="https://agentmods.dev/skills/agentsecops/secopsagentkit/api-mitmproxy"><img src="https://agentmods.dev/badge/skills/agentsecops/secopsagentkit/api-mitmproxy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 142 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,529 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00142 $0.03529
Opus 5.5 $0.00057 $0.01412
Sonnet 5.5 $0.00028 $0.00706
Haiku 4.5 $0.00014 $0.00353

Measured 1mo ago against content hash ea21648bbd84, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

api-mitmproxy scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf ~/.mitmproxy/

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

skills/appsec/api-mitmproxy/SKILL.md · 485 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 485 lines · 142 tokens per session scan B ea21648bbd84

Subscribe to this mod's changes

api-mitmproxy is a skill published in the GitHub repository AgentSecOps/SecOpsAgentKit (222 stars, last pushed 6mo ago), with no licence file. It adds 142 tokens to every session and 3,529 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it B with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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