Borrowing it
Nothing to install: this file belongs to Cumulocity-IoT/cumulocity-mcp-server. 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/Cumulocity-IoT/cumulocity-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/Cumulocity-IoT/cumulocity-mcp-serverWrote 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/cumulocity-iot/cumulocity-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/cumulocity-iot/cumulocity-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/cumulocity-iot/cumulocity-mcp-server/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/cumulocity-iot/cumulocity-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/cumulocity-iot/cumulocity-mcp-server/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 | $0.00872 | $0.00872 |
| Opus 5 | $0.00436 | $0.00436 |
| Sonnet 5 | $0.00174 | $0.00174 |
| Haiku 4.5 | $0.00087 | $0.00087 |
Grade A, and why
cumulocity-mcp-server 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 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.
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 — 115 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
mcp-server-c8y is a Python-based MCP (Model Control Protocol) server that provides Cumulocity IoT platform functionality. It enables interaction with Cumulocity's device management, measurements, alarms, and dynamic mapping capabilities through a standardized MCP interface.
Architecture
Core Components
src/mcp_server_c8y/server.py: Main FastMCP server implementation with all tool definitionssrc/mcp_server_c8y/formatters.py: Data formatting utilities for devices, measurements, alarms, and eventssrc/mcp_server_c8y/settings.py: Configuration management and environment variable handlingsrc/mcp_server_c8y/logging_setup.py: Logging configurationsrc/mcp_server_c8y/__init__.py: CLI entry point and server startup logic
Key Dependencies
- FastMCP: MCP server framework
- c8y-api: Cumulocity IoT Python SDK
- httpx: HTTP client for API calls
- jsonata-python: JSONata expression evaluation
- pydantic: Data validation and serialization
Authentication & Configuration
The server requires these environment variables:
C8Y_BASEURL: Cumulocity instance URLC8Y_TENANT: Tenant IDC8Y_USER: Username (optional if using Authorization header)C8Y_PASSWORD: Password (optional if using Authorization header)
Can also authenticate via HTTP Authorization header for microservice deployment.
Common Development Commands
Development Setup
# Install dependencies using uv (recommended)
uv sync
# Run the server locally with stdio transport
uv run mcp-server-c8y --transport stdio
# Run with verbose logging
uv run mcp-server-c8y --transport stdio -v
# Run the MCP inspector for development/debugging
./scripts/run-inspector.sh
Version Management
# Increment patch version (e.g., 0.1.21 -> 0.1.22)
./scripts/increment-version.sh
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.
- 11d ago First seen · 115 lines · 872 tokens per session scan A 4923e3687ceb
cumulocity-mcp-server CLAUDE.md is an instructions file published in the GitHub repository Cumulocity-IoT/cumulocity-mcp-server (8 stars, last pushed 1y ago), licensed Apache-2.0. It adds 872 tokens to every session, about $0.0044 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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