cost-spike-investigation

cost-spike-investigation is a skill for Claude Code from Cloudzero/cloudzero-claude-marketplace. It costs 32 tokens per session (1,695 once invoked), scanned A, original, no licence file.

A guide for investigating a sudden or unexpected increase in cloud costs after the increase has been noticed.

In plain words
What is it for?
Use it to investigate cloud cost spikes and identify which part of the infrastructure caused them.
Why use it?
It helps trace the extra spending to the responsible service, account, or cloud resource.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the cost-analyst plugin — 12 skills, 1 MCP server shipped together

Good fit Use it to investigate cloud cost spikes and identify which part of the infrastructure caused them.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation
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 Cloudzero/cloudzero-claude-marketplace --skill cost-spike-investigation
Clone the repo
git clone --depth 1 https://github.com/Cloudzero/cloudzero-claude-marketplace

Made for: Claude Code.

Or install cost-analyst, the plugin that ships this one along with the rest of its 12 skills, 1 MCP server.

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 cost-spike-investigation

README.md
[![agentmods](https://agentmods.dev/badge/skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation/github.svg)](https://agentmods.dev/skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation)
Your own site
<a href="https://agentmods.dev/skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation"><img src="https://agentmods.dev/badge/skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation/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 cost-spike-investigation

Your own site · 80×15
<a href="https://agentmods.dev/skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation"><img src="https://agentmods.dev/badge/skills/cloudzero/cloudzero-claude-marketplace/cost-spike-investigation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,695 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00032 $0.01695
Opus 5 $0.00016 $0.00847
Sonnet 5 $0.00006 $0.00339
Haiku 4.5 $0.00003 $0.00169

Measured 11d ago against content hash a27c09561370, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

cost-spike-investigation scanned grade A 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 11d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Security:** Only use Python's stdlib `statistics`, `math`, and `decimal` for math operations. Do not import `os`, `subprocess`, `socket`, `urllib`, `requests`, or `pickle`. Bind API values to Python variables (`cost =
plugins/cost-analyst/skills/cost-spike-investigation/SKILL.md · 233 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

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. 11d ago First seen · 233 lines · 32 tokens per session scan A a27c09561370

Subscribe to this mod's changes

cost-spike-investigation is a skill published in the GitHub repository Cloudzero/cloudzero-claude-marketplace (24 stars, last pushed yesterday), with no licence file. It adds 32 tokens to every session and 1,695 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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