Borrowing it
Nothing to install: this file belongs to pkolawa/krs-poland-mcp-server. 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/pkolawa/krs-poland-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/pkolawa/krs-poland-mcp-serverWrote 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/instructions/pkolawa/krs-poland-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/pkolawa/krs-poland-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/pkolawa/krs-poland-mcp-server/claude-md/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/instructions/pkolawa/krs-poland-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/pkolawa/krs-poland-mcp-server/claude-md.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 | $0.00415 | $0.00415 |
| Opus 5.5 | $0.00166 | $0.00166 |
| Sonnet 5.5 | $0.00083 | $0.00083 |
| Haiku 4.5 | $0.00042 | $0.00042 |
Grade A, and why
krs-poland-mcp-server CLAUDE.md 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.
What it actually says
KRS Poland MCP Server
Serwer MCP udostępniający dane z publicznego API Krajowego Rejestru Sądowego (KRS) Ministerstwa Sprawiedliwości.
Architektura
- TypeScript +
@modelcontextprotocol/sdk, transport stdio - Dwa narzędzia MCP: odpis aktualny (
Get_Current_KRS_Record) i pełny (Get_Full_KRS_Record) - HTTP client z retry (30s/60s backoff) i dual URL fallback (path params + query params)
- Build: esbuild do jednego pliku ESM (
build/index.mjs)
Komendy
npm run build— lint + unit tests + esbuild bundlenpm run test:unit— testy unit (mockowany fetch)npm run test:integration— testy z prawdziwym API KRSnpm run lint— ESLintnpm run typecheck— TypeScript strict mode
Konwencje
- Walidacja inputów przez Zod ze schematem inline w tool definitions
- Odpowiedzi MCP zawierają
type: "text"z JSON w treści - API KRS:
https://api-krs.ms.gov.pl/api/krs/{typ}/{rejestr}/{krs}?format=json - Numer KRS: 10 cyfr zaczynających się od 0, rejestr: P (przedsiębiorców) lub S (stowarzyszeń)
Struktura plików
src/index.ts — entrypoint
src/server.ts — rejestracja narzędzi
src/tools/ — handlery narzędzi MCP
src/types/krs.ts — interfejs KrsExtract
src/utils/api.ts — HTTP client
src/utils/format.ts — formatowanie nagłówka
@TODO.md
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 · 39 lines · 415 tokens per session scan A 7af563902089
krs-poland-mcp-server CLAUDE.md is an instructions file published in the GitHub repository pkolawa/krs-poland-mcp-server (4 stars, last pushed 28d ago), licensed MIT. It adds 415 tokens to every session, about $0.0017 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.
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