Borrowing it
Nothing to install: this file belongs to CSOAI-ORG/api-tester-ai-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/CSOAI-ORG/api-tester-ai-mcp/main/.cursorrulesgit clone --depth 1 https://github.com/CSOAI-ORG/api-tester-ai-mcpWrote 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/csoai-org/api-tester-ai-mcp/cursorrules)<a href="https://agentmods.dev/rules/csoai-org/api-tester-ai-mcp/cursorrules"><img src="https://agentmods.dev/badge/rules/csoai-org/api-tester-ai-mcp/cursorrules/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/csoai-org/api-tester-ai-mcp/cursorrules"><img src="https://agentmods.dev/badge/rules/csoai-org/api-tester-ai-mcp/cursorrules.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 | $0.00077 | $0.00077 |
| Opus 5.5 | $0.00031 | $0.00031 |
| Sonnet 5.5 | $0.00015 | $0.00015 |
| Haiku 4.5 | $0.00008 | $0.00008 |
Grade A, and why
cursorrules 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 1mo 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.
What it actually says
api-tester-ai-mcp - Auto-trigger Rules
When the user asks about api tester, use api-tester-ai-mcp tools: send_request, validate_response, check_headers, generate_curl
API Tester AI MCP Server — API testing and validation tools.
Install: pip install api-tester-ai-mcp
By MEOK AI Labs — MIT licensed.
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.
- 1mo ago First seen · 10 lines · 77 tokens per session scan A 9fae316fd4bb
cursorrules is a cursor rule published in the GitHub repository CSOAI-ORG/api-tester-ai-mcp (0 stars, last pushed 21d ago), licensed MIT. It adds 77 tokens to every session, about $0.0003 per session on Opus 5.5. 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 2026-08-31.
Other cursor rules, from other repositories
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mcpnuke-development
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mcp-development
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ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.