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/olgasafonova/nordic-registry-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/rules/olgasafonova/nordic-registry-mcp-server/registry-best-practices)<a href="https://agentmods.dev/rules/olgasafonova/nordic-registry-mcp-server/registry-best-practices"><img src="https://agentmods.dev/badge/rules/olgasafonova/nordic-registry-mcp-server/registry-best-practices/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/olgasafonova/nordic-registry-mcp-server/registry-best-practices"><img src="https://agentmods.dev/badge/rules/olgasafonova/nordic-registry-mcp-server/registry-best-practices.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 | $0.00229 | $0.00229 |
| Opus 5 | $0.00114 | $0.00114 |
| Sonnet 5 | $0.00046 | $0.00046 |
| Haiku 4.5 | $0.00023 | $0.00023 |
Grade A, and why
registry-best-practices 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 12d 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
Nordic registry usage guardrails
- Identify the country before calling tools. Each country has separate tools prefixed with the country name.
- Organization number formats differ by country:
- Norway: 9 digits (spaces/dashes auto-stripped)
- Denmark: 8 digits (DK- prefix optional)
- Finland: 7+1 format with hyphen (e.g., 0112038-9)
- Sweden: 10 digits (hyphen optional)
- Danish search returns a single result. If it seems wrong, try the company's legal name, A/S suffix, or pre-merger name.
- Finnish search for common names (like "Nokia") returns hundreds of results. Filter by
company_form(OY, OYJ) orlocation. - Sweden has no name search; you must have the organization number.
- Use
norway_batch_get_companieswhen validating 3+ Norwegian org numbers instead of individual lookups. - All data is read-only from official government sources. No modifications are possible.
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.
- 12d ago First seen · 18 lines · 229 tokens per session scan A 84fd960123bc
registry-best-practices is a cursor rule published in the GitHub repository olgasafonova/nordic-registry-mcp-server (8 stars, last pushed 3d ago), licensed Apache-2.0. It adds 229 tokens to every session, about $0.0011 per session on Opus 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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