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mitmproxy-mcp

mitmproxy-mcp is a skill for Claude Code, Codex from moha-abdi/mitmproxy-mcp. It costs 59 tokens per session (1,187 once invoked), scanned A, original, MIT.

A skill for inspecting, intercepting, changing, and replaying HTTP and HTTPS traffic through mitmproxy, a proxy used to view network requests. It provides tools for examining captured requests and responses.

In plain words
What is it for?
Use it to debug APIs, inspect requests and responses, replay or modify traffic, filter captured flows, export HAR files, and perform security testing.
Why use it?
It helps reveal how an application communicates with its backend and makes API problems easier to investigate without manually reproducing every request.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 9repo 8mo ago A scan 59 tokens original MIT

Good fit Use it to debug APIs, inspect requests and responses, replay or modify traffic, filter captured flows, export HAR files, and perform security testing.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp
View source ↗ moha-abdi/mitmproxy-mcp
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 moha-abdi/mitmproxy-mcp --skill mitmproxy-mcp
Clone the repo
git clone --depth 1 https://github.com/moha-abdi/mitmproxy-mcp

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 mitmproxy-mcp

README.md
[![agentmods](https://agentmods.dev/badge/skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp/github.svg)](https://agentmods.dev/skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp)
Your own site
<a href="https://agentmods.dev/skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp"><img src="https://agentmods.dev/badge/skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp/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 mitmproxy-mcp

Your own site · 80×15
<a href="https://agentmods.dev/skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp"><img src="https://agentmods.dev/badge/skills/moha-abdi/mitmproxy-mcp/mitmproxy-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,187 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00059 $0.01187
Opus 5.5 $0.00024 $0.00475
Sonnet 5.5 $0.00012 $0.00237
Haiku 4.5 $0.00006 $0.00119

Measured 1mo ago against content hash 409a8581e134, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mitmproxy-mcp scanned grade A with 0 findings 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mitmproxy-mcp

HTTP/HTTPS traffic analysis, interception, and replay through mitmproxy.

Prerequisites

  • mitmproxy running with the mitmproxy-mcp addon loaded
  • MCP server available at http://localhost:9011/sse (SSE transport)

If the MCP server is not connected, tell the user to start mitmproxy first:

mitmproxy      # or mitmweb, or mitmdump

The addon and MCP server start automatically if configured in ~/.mitmproxy/config.yaml. For dependency-safe startup, install shims once with mitmproxy-mcp install-shims --force.

When to Use This Skill

  • User asks to inspect, debug, or analyze HTTP traffic
  • User wants to replay or modify an HTTP request
  • User wants to intercept requests matching a pattern
  • User needs to export captured traffic (HAR format)
  • User is doing API debugging or security testing

Available Tools (20)

Flow Tools -- querying captured traffic

  • get_flows -- list captured flows with optional filtering by method, URL pattern, or status code. Supports limit and offset for pagination.
  • get_flow_by_id -- get full request and response details for a single flow
  • search_flows -- search flows by regex pattern across URL, method, status, and headers
  • get_flow_request -- get only the request portion of a flow
  • get_flow_response -- get only the response portion of a flow
  • get_flow_count -- count of currently stored flows
  • clear_flows -- clear all stored flows and clear mitmproxy's flow view when sync includes clear
  • export_flows -- export flows to HAR 1.2 format. Optionally pass specific flow IDs.

Replay Tools -- sending and modifying requests

  • replay_request -- replay a captured request exactly as-is. Replays in-place when view sync includes replay; otherwise creates a detached replay flow.
  • send_request -- send a new HTTP request. Parameters: url (required), method (default GET), headers, body.
  • modify_and_send -- take an existing flow, change its method/url/headers/body, and send it. Useful for testing variations.
  • duplicate_flow -- clone a flow without sending it. Useful for before/after comparisons.

Read the full file on GitHub · 99 lines

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 · 99 lines · 59 tokens per session scan A 409a8581e134

Subscribe to this mod's changes

mitmproxy-mcp is a skill published in the GitHub repository moha-abdi/mitmproxy-mcp (9 stars, last pushed 8mo ago), licensed MIT. It adds 59 tokens to every session and 1,187 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Backend and APIsDebugging
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