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.
git clone --depth 1 https://github.com/SwonVIP/mcp-server-talkWrote 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/rules/swonvip/mcp-server-talk/demo-3-uv-mcp-implementation)<a href="https://agentmods.dev/rules/swonvip/mcp-server-talk/demo-3-uv-mcp-implementation"><img src="https://agentmods.dev/badge/rules/swonvip/mcp-server-talk/demo-3-uv-mcp-implementation/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/rules/swonvip/mcp-server-talk/demo-3-uv-mcp-implementation"><img src="https://agentmods.dev/badge/rules/swonvip/mcp-server-talk/demo-3-uv-mcp-implementation.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 | $0.00000 | $0.00941 |
| Opus 5.5 | $0.00000 | $0.00376 |
| Sonnet 5.5 | $0.00000 | $0.00188 |
| Haiku 4.5 | $0.00000 | $0.00094 |
Grade A, and why
demo-3-uv-mcp-implementation 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 2mo 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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Demo 3: UV-Based MCP Server Implementation
Implementation Checklist
✅ Core Files Created
-
demo/3/simple_mcp_server.py- Main MCP server implementation -
demo/3/pyproject.toml- UV project configuration -
demo/3/README.md- Comprehensive documentation -
demo/3/DEMO_GUIDE.md- Quick demo guide -
demo/3/setup.sh- Setup and utility script -
demo/3/cursor_mcp_config.json- Sample Cursor configuration -
demo/3/.gitignore- Git ignore rules
✅ MCP Server Features
- Mathematical tools (add, subtract, multiply, divide, power, sqrt, factorial, percentage, average)
- Resources (server-info, recipe content)
- Prompts (math-helper, calculator)
- Error handling for edge cases (division by zero, negative square roots, etc.)
- FastMCP framework integration
✅ UV Integration
- Proper pyproject.toml configuration
- Python 3.10+ requirement (FastMCP compatibility)
- Simplified package structure (script-only, no build system)
- Dependency management with UV
- Virtual environment creation
✅ Cursor Configuration
- Sample MCP configuration file
- Absolute path handling
- UV command structure for MCP clients
- Documentation for configuration steps
✅ Documentation
- Comprehensive README with setup instructions
- Demo guide with step-by-step instructions
- Troubleshooting section
- Comparison with Docker version
- File structure documentation
✅ Testing & Validation
- UV sync functionality verified
- Server startup testing
- Dependency resolution confirmed
- Setup script functionality
Key Implementation Decisions
UV Configuration
- Used simplified pyproject.toml without build system
- Focused on dependency management only
- Avoided package building complexity
- Used Python 3.10+ for FastMCP compatibility
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.
- 2mo ago First seen · 140 lines · 0 tokens per session scan A a3e1f4e51272
demo-3-uv-mcp-implementation is a cursor rule published in the GitHub repository SwonVIP/mcp-server-talk (0 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 941 tokens. 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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