Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/curiositech/some_claude_skillsnpx agentmods add skills/curiositech/some_claude_skills/mcp-creatorWrote 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/curiositech/some_claude_skills/mcp-creator)<a href="https://agentmods.dev/skills/curiositech/some_claude_skills/mcp-creator"><img src="https://agentmods.dev/badge/skills/curiositech/some_claude_skills/mcp-creator/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/curiositech/some_claude_skills/mcp-creator"><img src="https://agentmods.dev/badge/skills/curiositech/some_claude_skills/mcp-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 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 45 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 MCP Rug Pull · line 51 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 MCP Rug Pull · line 413 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 Excessive Agency · line 389 Skill grants unrestricted tool access without appropriate constraints. An agent with unfettered tool access can perform arbitrary actions including file modification, network requests, and code execution.Fix: Restrict tool access to only the tools required for the skill's stated purpose. Use an explicit allowlist rather than granting blanket access.
- medium Excessive Agency · line 389 Skill allows unbounded resource consumption (API calls, storage, compute). Without rate limits or quotas, a compromised or misbehaving agent can cause denial-of-service or cost overruns.Fix: Set explicit rate limits, timeouts, and resource quotas for API calls, file operations, and compute. Implement circuit breakers for runaway loops.
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 | $0.00100 | $0.03324 |
| Opus 5 | $0.00050 | $0.01662 |
| Sonnet 5 | $0.00020 | $0.00665 |
| Haiku 4.5 | $0.00010 | $0.00332 |
Grade A, and why
mcp-creator scanned grade A with 1 finding 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 7d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const timestamps = this.requests.get(key) || []; How it starts
The opening of the file, as written. The whole thing — 480 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP Creator
Expert in building production-ready Model Context Protocol servers. Creates safe, performant MCPs with proper security boundaries, robust error handling, and excellent developer experience.
When to Use This Skill
Use MCP when you need:
- External API integration with authentication
- Stateful connections (databases, WebSockets, sessions)
- Multiple related tools sharing configuration
- Security boundaries between Claude and external services
- Connection pooling and resource management
Do NOT use MCP for:
- Pure domain expertise (use Skill)
- Multi-step orchestration (use Agent)
- Local stateless operations (use Script)
- Simple file processing (use Claude's built-in tools)
Quick Start
# Scaffold new MCP server
npx @modelcontextprotocol/create-server my-mcp-server
# Install SDK
npm install @modelcontextprotocol/sdk
# Test with inspector
npx @modelcontextprotocol/inspector
MCP Architecture Overview
┌─────────────────────────────────────────────────────────────┐
│ Claude │
└─────────────────────────┬───────────────────────────────────┘
│ MCP Protocol (JSON-RPC)
┌─────────────────────────┴───────────────────────────────────┐
│ MCP Server │
│ ┌─────────────┐ ┌─────────────┐ ┌─────────────────────┐ │
│ │ Tools │ │ Resources │ │ Prompts │ │
│ │ (actions) │ │ (read-only) │ │ (templates) │ │
│ └─────────────┘ └─────────────┘ └─────────────────────┘ │
│ │ │
│ ┌───────────────────────┴──────────────────────────────┐ │
│ │ Auth / Rate Limiting / Caching │ │
│ └───────────────────────┬──────────────────────────────┘ │
└──────────────────────────┼──────────────────────────────────┘
│
┌──────────────────────────┴──────────────────────────────────┐
│ External Services │
│ APIs │ Databases │ File Systems │ WebSockets │
└─────────────────────────────────────────────────────────────┘
What ships with it
8 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.
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.
- 7d ago First seen · 480 lines · 100 tokens per session scan A c5b868592a05
mcp-creator is a skill published in the GitHub repository curiositech/some_claude_skills (218 stars, last pushed 4d ago), licensed MIT. It adds 100 tokens to every session and 3,324 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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