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 rules/dennisonbertram/mcp-ethers-v6/mcptestinggit clone --depth 1 https://github.com/dennisonbertram/mcp-ethers-v6What 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 | $0.00069 | $0.00069 |
| Opus 5 | $0.00034 | $0.00034 |
| Sonnet 5 | $0.00014 | $0.00014 |
| Haiku 4.5 | $0.00007 | $0.00007 |
Grade A, and why
mcptesting 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 2d 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.
This is a copy
100% identical to mcptesting — 0 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.
What it actually says
MCP Server testing
- Do not run MCP servers at the command line, they don't return anything and can not be tested this way
- Do not use console.log in MCP servers. They break STDIO interface
- Stay focused
- Do not create new servers
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.
- 2d ago First seen · 12 lines · 69 tokens per session scan A 7fc2786b6733
mcptesting is a cursor rule published in the GitHub repository dennisonbertram/mcp-ethers-v6 (1 stars, last pushed 1y ago), licensed MIT. It adds 69 tokens to every session, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to mcptesting, differing in 0 lines, and is treated as a copy.
Other cursor rules, from other repositories
solana-integration-constraints
Constraints and requirements for Solana integration with MetaMask Connect — wallet adapter config, CAIP-2 IDs, network support per platform, RPC routing, and platform limitations.
cadence-nft-standards
Comprehensive standards and best practices for developing Non-Fungible Tokens (NFTs) using Cadence. Ensures proper implementation of NonFungibleToken interfaces, MetadataViews integration for marketplace compatibility, secure resource handling patterns, and advanced modular architectures for complex NFTs with traits…
security-researcher-security-researcher--crypto-checklist
Detailed reference for crypto checklist (Security Researcher skill).
prediction-market-contract
Cursor rule "prediction-market-contract" from DeWiCats/solana-dev-cursor-rules, covering prediction market core rules, market structure, amm pool mechanics, share model and account structure.
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.
dev-standard
Apache Superset development standards and guidelines for Cursor IDE.