What is claude-carbon marketplace?

A session tracker that estimates the carbon footprint of Claude Code use. A carbon footprint is an estimate of the environmental emissions associated with running a service.

Tracking the estimated carbon footprint of individual or ongoing Claude Code sessions.

It gives you a way to monitor the environmental impact associated with your coding-agent sessions.

claude-carbon marketplace — Plugin for Claude Code by gwittebolle

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.

Clone the repo

git clone --depth 1 https://github.com/gwittebolle/claude-carbon

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/gwittebolle/claude-carbon/marketplace/github.svg)](https://agentmods.dev/plugins/gwittebolle/claude-carbon/marketplace)

Your own site

<a href="https://agentmods.dev/plugins/gwittebolle/claude-carbon/marketplace"><img src="https://agentmods.dev/badge/plugins/gwittebolle/claude-carbon/marketplace/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/gwittebolle/claude-carbon/marketplace"><img src="https://agentmods.dev/badge/plugins/gwittebolle/claude-carbon/marketplace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

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.

Security

Grade A, and why

claude-carbon marketplace 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 10d 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.

.claude-plugin/marketplace.json · 33 lines

What it actually says

{
  "name": "claude-carbon",
  "owner": {
    "name": "Gaetan Wittebolle"
  },
  "metadata": {
    "description": "Track the carbon footprint of your Claude Code sessions, in the terminal and the Claude desktop app"
  },
  "plugins": [
    {
      "name": "claude-carbon",
      "source": {
        "source": "url",
        "url": "https://github.com/gwittebolle/claude-carbon.git"
      },
      "description": "Track the carbon footprint of your Claude Code sessions, in the terminal and the Claude desktop app",
      "version": "1.18.2",
      "author": {
        "name": "Gaetan Wittebolle"
      },
      "homepage": "https://github.com/gwittebolle/claude-carbon",
      "repository": "https://github.com/gwittebolle/claude-carbon",
      "license": "MIT",
      "keywords": [
        "carbon-footprint",
        "sustainability",
        "claude-code",
        "green-it"
      ]
    }
  ]
}

Contents

The plugins it lists here

This marketplace lists 1 plugin kept in the same repository. Each has its own page, its own measurements and its own install command.

Plugin claude-carbon 10 inside A not measured

Files

What ships with it

1 file beside marketplace.json 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.

plugin.json 1.3 KB

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.

10d ago Changed daef2eb9d77a
16d ago Changed 94b1d9d554ec
18d ago Changed 1f95488fa461
21d ago Changed cd663838ecc5
22d ago Changed f76caf6fb4de
23d ago Changed 6115fea9dbdd
25d ago Changed f377dbca4ac5
28d ago Changed cfdb27bdc94a
1mo ago Changed 0e6f7c9a7897
1mo ago First seen · 33 lines scan A 865321e0569e

Subscribe to this mod's changes

claude-carbon marketplace is a plugin published in the GitHub repository gwittebolle/claude-carbon (236 stars, last pushed 4d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.

Analytics and metrics Claude Code ai-sustainability carbon-emissions carbon-footprint cli green-it

claude-carbon marketplace next to 6 plugins from other repositories
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humanizerblader/humanizer	Plugin	65k	9d ago	MIT	A	—	Claude Code
claude-plugins-official marketplaceanthropics/claude-plugins-official	Plugin	46k	yesterday	Apache-2.0	A	—	Claude Code