A command that compares your current Octopus Energy tariff with another Octopus product for a chosen period and fuel type.

Use it to compare electricity and gas costs, review per-day differences, and check caveats when considering another Octopus tariff.

It helps you see the cost difference between tariffs, including daily changes and any warnings from the comparison.

compare — Command for Claude Code by DanielChicot/octopus-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.

Clone the repo

git clone --depth 1 https://github.com/DanielChicot/octopus-mcp

Made for: Claude Code.

Or install octopus, the plugin that ships this one along with the rest of its 1 skill, 4 commands, 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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/danielchicot/octopus-mcp/compare/github.svg)](https://agentmods.dev/commands/danielchicot/octopus-mcp/compare)

Your own site

<a href="https://agentmods.dev/commands/danielchicot/octopus-mcp/compare"><img src="https://agentmods.dev/badge/commands/danielchicot/octopus-mcp/compare/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/commands/danielchicot/octopus-mcp/compare"><img src="https://agentmods.dev/badge/commands/danielchicot/octopus-mcp/compare.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 10 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 176 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.

Model	Per session	Once invoked
Fable 5.1	$0.00010	$0.00176
Opus 5.5	$0.00004	$0.00070
Sonnet 5.5	$0.00002	$0.00035
Haiku 4.5	$0.00001	$0.00018

Measured 2mo ago against content hash 8bf335a8c544, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

compare 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 2mo 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.

plugins/octopus/commands/compare.md · 17 lines

What it actually says

Use the compare_tariff MCP tool with:

target_product_code = "$1"
period.kind = "$2" (default last_month)
fuel = "both"

Format:

Top line: the pounds_summary field, prominent.
Per-fuel table: Fuel | Current £ | Target £ | Delta £.
Show the per-day breakdown as a small markdown table beneath, sorted by date.
List every entry in caveats[] as bullets at the end. Do NOT hide them.
If the tool returns an error mentioning Intelligent Octopus, suggest trying GO-VAR-22-10-14 or COSY-22-12-08 instead.

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.

2mo ago First seen · 17 lines · 10 tokens per session scan A 8bf335a8c544

Subscribe to this mod's changes

compare is a command published in the GitHub repository DanielChicot/octopus-mcp (0 stars, last pushed 4mo ago), licensed MIT. It adds 10 tokens to every session and 176 once invoked, about $0.0000 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.

compare next to 6 commands from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
compareDanielChicot/octopus-mcp	Command	0	4mo ago	MIT	A	10	Claude Code
checklistgithub/spec-kit	Command	149k	today	MIT	A	13	Claude Code
clarifygithub/spec-kit	Command	149k	today	MIT	A	27	Claude Code
specifygithub/spec-kit	Command	149k	today	MIT	A	13	Claude Code
analyzegithub/spec-kit	Command	149k	today	MIT	A	26	Claude Code
convergegithub/spec-kit	Command	149k	today	MIT	A	35	Claude Code
implementgithub/spec-kit	Command	149k	today	MIT	A	14	Claude Code