Borrowing it
Nothing to install: this file belongs to umbraco/Umbraco-MCP-Base. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/umbraco/Umbraco-MCP-Base/main/CLAUDE.mdgit clone --depth 1 https://github.com/umbraco/Umbraco-MCP-BaseWrote 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.
[](https://agentmods.dev/instructions/umbraco/umbraco-mcp-base/claude-md)<a href="https://agentmods.dev/instructions/umbraco/umbraco-mcp-base/claude-md"><img src="https://agentmods.dev/badge/instructions/umbraco/umbraco-mcp-base/claude-md/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.
<a href="https://agentmods.dev/instructions/umbraco/umbraco-mcp-base/claude-md"><img src="https://agentmods.dev/badge/instructions/umbraco/umbraco-mcp-base/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.03814 | $0.03814 |
| Opus 5 | $0.01907 | $0.01907 |
| Sonnet 5 | $0.00763 | $0.00763 |
| Haiku 4.5 | $0.00381 | $0.00381 |
Grade A, and why
Umbraco-MCP-Base CLAUDE.md 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 246 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
Monorepo for the Umbraco MCP (Model Context Protocol) Server SDK - infrastructure for building MCP servers that expose Umbraco APIs to AI assistants.
Monorepo Structure
| Workspace | Description | Published |
|---|---|---|
packages/mcp-server-sdk/ |
Core npm package @umbraco-cms/mcp-server-sdk |
Yes |
packages/hosted-mcp/ |
Hosted MCP on Cloudflare Workers @umbraco-cms/mcp-hosted |
Yes |
packages/create-mcp-server/ |
CLI scaffolding tool @umbraco-cms/create-umbraco-mcp-server |
Yes |
template/ |
Starter kit for new MCP server projects (copied by create-mcp-server); ships with .mcp.json for Claude Code |
No |
plugins/ |
Claude Code plugins for SDK development (building, testing) | No |
tests/cli/ |
CLI integration tests and LLM eval tests | No |
docs/ |
CLI reference and planning docs | No |
Each workspace has its own CLAUDE.md with detailed guidance.
Build Commands
npm install # Install all workspace dependencies
npm run build # Build SDK
npm run test # Test SDK
Workspace-specific commands use -w flag: npm run build -w packages/mcp-server-sdk
Test Catalogue
Run all tests before merging. Tests are grouped by what they cover and what infrastructure they need.
No infrastructure required
| Command | What it tests | Tests |
|---|---|---|
npm run test |
SDK unit tests (tool filtering, config, helpers, CLI commands) | ~425 |
npm test -w packages/hosted-mcp |
Hosted MCP unit tests (config, auth, consent, server creation) | ~191 |
npm test -w packages/create-mcp-server |
Scaffolding CLI unit tests | ~121 |
Requires npm run build + npm run build -w template
| Command | What it tests | Tests |
|---|---|---|
npm run test:cli |
CLI integration tests — runs built template binary with filtering, introspection, dry-run, input sanitization; plus real-orval target-major generation | ~31 |
npm run test:integration |
Hosted MCP Wrangler integration tests | ~20 |
npm run test:integration:chained |
Chained hosted MCP integration tests | ~18 |
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.
- 9d ago First seen · 246 lines · 3,814 tokens per session scan A 7d6cebedfdb5
Umbraco-MCP-Base CLAUDE.md is an instructions file published in the GitHub repository umbraco/Umbraco-MCP-Base (2 stars, last pushed today), licensed MIT. It adds 3,814 tokens to every session, about $0.0191 per session on Opus 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.
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