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 agentmods add skills/smarks26/claude-plugin-template/mcp-integrationnpx skills add smarks26/claude-plugin-template --skill mcp-integrationgit clone --depth 1 https://github.com/smarks26/claude-plugin-templateWrote 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/smarks26/claude-plugin-template/mcp-integration)<a href="https://agentmods.dev/skills/smarks26/claude-plugin-template/mcp-integration"><img src="https://agentmods.dev/badge/skills/smarks26/claude-plugin-template/mcp-integration.svg" alt="Measured on agentmods" 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 | $0.00098 | $0.03034 |
| Opus 5 | $0.00049 | $0.01517 |
| Sonnet 5 | $0.00020 | $0.00607 |
| Haiku 4.5 | $0.00010 | $0.00303 |
Grade B, and why
mcp-integration scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
- ❌ Pre-allow all tools with wildcards This is a copy
100% identical to mcp-integration — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 555 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP Integration for Claude Code Plugins
Overview
Model Context Protocol (MCP) enables Claude Code plugins to integrate with external services and APIs by providing structured tool access. Use MCP integration to expose external service capabilities as tools within Claude Code.
Key capabilities:
- Connect to external services (databases, APIs, file systems)
- Provide 10+ related tools from a single service
- Handle OAuth and complex authentication flows
- Bundle MCP servers with plugins for automatic setup
MCP Server Configuration Methods
Plugins can bundle MCP servers in two ways:
Method 1: Dedicated .mcp.json (Recommended)
Create .mcp.json at plugin root:
{
"database-tools": {
"command": "${CLAUDE_PLUGIN_ROOT}/servers/db-server",
"args": ["--config", "${CLAUDE_PLUGIN_ROOT}/config.json"],
"env": {
"DB_URL": "${DB_URL}"
}
}
}
Benefits:
- Clear separation of concerns
- Easier to maintain
- Better for multiple servers
Method 2: Inline in plugin.json
Add mcpServers field to plugin.json:
{
"name": "my-plugin",
"version": "1.0.0",
"mcpServers": {
"plugin-api": {
"command": "${CLAUDE_PLUGIN_ROOT}/servers/api-server",
"args": ["--port", "8080"]
}
}
}
Benefits:
- Single configuration file
- Good for simple single-server plugins
MCP Server Types
stdio (Local Process)
Execute local MCP servers as child processes. Best for local tools and custom servers.
Configuration:
{
"filesystem": {
"command": "npx",
"args": ["-y", "@modelcontextprotocol/server-filesystem", "/allowed/path"],
"env": {
"LOG_LEVEL": "debug"
}
}
}
Use cases:
- File system access
- Local database connections
- Custom MCP servers
- NPM-packaged MCP servers
Process management:
- Claude Code spawns and manages the process
- Communicates via stdin/stdout
- Terminates when Claude Code exits
SSE (Server-Sent Events)
Connect to hosted MCP servers with OAuth support. Best for cloud services.
What ships with it
6 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.
- 4d ago First seen · 555 lines · 98 tokens per session scan B 2bcc3b5e9392
mcp-integration is a skill published in the GitHub repository smarks26/claude-plugin-template (2 stars, last pushed 3mo ago), licensed MIT. It adds 98 tokens to every session and 3,034 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). It is 100% identical to mcp-integration, differing in 4 lines, and is treated as a copy.
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