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.
npx skills add 0xDarkMatter/claude-mods --skill mcp-opsgit clone --depth 1 https://github.com/0xDarkMatter/claude-modsWrote 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/skills/0xdarkmatter/claude-mods/mcp-ops)<a href="https://agentmods.dev/skills/0xdarkmatter/claude-mods/mcp-ops"><img src="https://agentmods.dev/badge/skills/0xdarkmatter/claude-mods/mcp-ops/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/skills/0xdarkmatter/claude-mods/mcp-ops"><img src="https://agentmods.dev/badge/skills/0xdarkmatter/claude-mods/mcp-ops.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 234 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium Data Exfiltration · line 264 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium MCP Rug Pull · line 357 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00072 | $0.03503 |
| Opus 5 | $0.00036 | $0.01751 |
| Sonnet 5 | $0.00014 | $0.00701 |
| Haiku 4.5 | $0.00007 | $0.00350 |
Grade A, and why
mcp-ops 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 — 360 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP Operations
Comprehensive patterns for building, testing, and deploying Model Context Protocol servers in Python and TypeScript.
Ecosystem facts verified as of 2026-07-05 (standalone FastMCP at major 3).
MCP Architecture Quick Reference
┌─────────────────────────────────────────────────────────┐
│ MCP Host │
│ (Claude Desktop, Claude Code, Custom App) │
│ │
│ ┌───────────┐ ┌───────────┐ ┌───────────┐ │
│ │ Client A │ │ Client B │ │ Client C │ │
│ └─────┬─────┘ └─────┬─────┘ └─────┬─────┘ │
└────────┼───────────────┼───────────────┼────────────────┘
│ │ │
┌────┴────┐ ┌────┴────┐ ┌────┴────┐
│Transport│ │Transport│ │Transport│
│ (stdio) │ │ (SSE) │ │ (HTTP) │
└────┬────┘ └────┬────┘ └────┬────┘
│ │ │
┌────────┴──┐ ┌──────┴────┐ ┌──────┴────┐
│ Server A │ │ Server B │ │ Server C │
│ │ │ │ │ │
│ ┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐ │
│ │ Tools │ │ │ │Resources│ │ │ │Prompts │ │
│ └────────┘ │ │ └────────┘ │ │ └────────┘ │
│ ┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐ │
│ │Resources│ │ │ │Prompts │ │ │ │ Tools │ │
│ └────────┘ │ │ └────────┘ │ │ └────────┘ │
└────────────┘ └────────────┘ └────────────┘
Protocol: JSON-RPC 2.0 over chosen transport
Flow: Client → request → Server → response → Client
Server Type Decision Tree
What transport does your MCP server need?
│
├─ Local CLI tool / single-user desktop integration?
│ └─ stdio
│ - Simplest setup, no networking
│ - Claude Desktop, Claude Code native support
│ - Process lifecycle managed by host
│
├─ Web dashboard / browser-based client?
│ └─ SSE (Server-Sent Events)
│ - HTTP-based, works through firewalls
│ - Persistent connection for server→client events
│ - Good for development and internal tools
│
└─ Production API / multi-tenant / cloud deployment?
└─ Streamable HTTP
- HTTP POST for requests, SSE for streaming responses
- Supports stateless and stateful modes
- Full auth support, load balancer friendly
- Recommended for production deployments
What ships with it
10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/.gitkeep 0 B
- assets/mcp-facts.json 2.3 KB
- references/resources-prompts.md 16 KB
- references/server-architecture.md 20 KB
- references/testing-debugging.md 25 KB
- references/tool-handlers.md 24 KB
- references/transport-auth.md 21 KB
- scripts/.gitkeep 0 B
- scripts/check-mcp-facts.py 12 KB runs code
- tests/run.sh 5.2 KB runs code
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 · 360 lines · 72 tokens per session scan A b2a03cec3a29
mcp-ops is a skill published in the GitHub repository 0xDarkMatter/claude-mods (34 stars, last pushed 16d ago), licensed MIT. It adds 72 tokens to every session and 3,503 once invoked, about $0.0004 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 2026-08-30.
Other skills, from other repositories
cloudkit-sync
Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring. Use when adding iCloud sync to an iOS/macOS app.
offline-queue
Generates an offline operation queue with persistence, automatic retry on connectivity, and conflict resolution. Use when user needs offline-first behavior, queued mutations, or pending operations that sync when back online.
push-notifications
Generate push notification infrastructure with APNs registration, handling, and rich notifications. Use when adding push notifications, configuring APNs, notification categories/actions, or rich notifications with images and custom UI.
http-cache
Generates an HTTP caching layer with Cache-Control parsing, ETag/conditional requests, and offline fallback. Use when user wants to add response caching, offline support, or reduce API calls.
pagination
Generates pagination infrastructure with offset or cursor-based patterns, infinite scroll, and search support. Use when user wants to add paginated lists, infinite scrolling, or load-more functionality.
networking-layer
Generates a protocol-based networking layer with async/await, error handling, and swappable implementations. Use when user wants to add API client, networking, or HTTP layer.