What is firstch-tools?

A local tool collection for tasks such as checking colour contrast, converting WebP images, generating JSON-LD, converting JSON and YAML, and rendering Marp slides.

Use it for the listed conversions, accessibility checks, code or text comparisons, data generation, CSS unit changes, and related utility tasks.

It groups many small text, web, design, format, and calculation utilities in one coding-agent service.

firstch-tools — MCP server by First-CH/firstch-tools-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/First-CH/firstch-tools-mcp

Made for: Claude Code.

Or install firstch-tools, the plugin that ships this one along with the rest of its 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/mcp/first-ch/firstch-tools-mcp/firstch-tools-firstch-tools/github.svg)](https://agentmods.dev/mcp/first-ch/firstch-tools-mcp/firstch-tools-firstch-tools)

Your own site

<a href="https://agentmods.dev/mcp/first-ch/firstch-tools-mcp/firstch-tools-firstch-tools"><img src="https://agentmods.dev/badge/mcp/first-ch/firstch-tools-mcp/firstch-tools-firstch-tools/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/mcp/first-ch/firstch-tools-mcp/firstch-tools-firstch-tools"><img src="https://agentmods.dev/badge/mcp/first-ch/firstch-tools-mcp/firstch-tools-firstch-tools.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

firstch-tools 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 today.

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/firstch-tools/.mcp.json · 9 lines

What it actually says

{
  "firstch-tools": {
    "command": "npx",
    "args": [
      "-y",
      "@first-ch/[email protected]"
    ]
  }
}

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.

today Changed a80bc269797e
2d ago Changed f555ba5600c8
3d ago Changed a8dfb669cc4e
10d ago Changed 22564754b3b4
22d ago Changed 183b1b4d7c16
23d ago Changed f80b02bbf89a
29d ago Changed 750006432f0a
1mo ago Changed 2860cb7c2018
1mo ago Changed ddb422d8a26c
1mo ago First seen · 9 lines scan A f2924e86e2c5

Subscribe to this mod's changes

firstch-tools is an MCP server published in the GitHub repository First-CH/firstch-tools-mcp (0 stars, last pushed today), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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.

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