What is kronan-mcp CLAUDE.md?

A project instruction guide for an MCP server that connects an AI agent to the Krónan grocery-store API in Iceland. The guide covers building, authentication, configuration, and the available API structure.

Use it when building, configuring, or extending the Krónan MCP server, especially its HTTP client, registered tools, OpenAPI reference, and authenticated API requests.

It provides the setup details needed to run the server, including the access token, build command, request format, rate limit, and currency representation.

How sandsower/kronan-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to sandsower/kronan-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.

Copy the file

curl -O https://raw.githubusercontent.com/sandsower/kronan-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/sandsower/kronan-mcp

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/sandsower/kronan-mcp/claude-md.svg)](https://agentmods.dev/instructions/sandsower/kronan-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/sandsower/kronan-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/sandsower/kronan-mcp/claude-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 249 This file is loaded in full into every session.

When invoked 249 The same file — it is already loaded in full.

Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00249	$0.00249
Opus 5	$0.00125	$0.00125
Sonnet 5	$0.00050	$0.00050
Haiku 4.5	$0.00025	$0.00025

Measured 8d ago against content hash 122118817382, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade B, and why

kronan-mcp CLAUDE.md scanned grade B with 1 finding 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 8d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Add to `~/.claude/settings.json`:

CLAUDE.md · 43 lines

What it actually says

kronan-mcp

MCP server for the Krónan grocery store API (Iceland).

Build

npm install && npm run build

Configure

Requires KRONAN_ACCESS_TOKEN environment variable. Tokens are created via Audkenni login in the Krónan user/customer group settings.

Usage in Claude Code

Add to ~/.claude/settings.json:

{
  "mcpServers": {
    "kronan": {
      "command": "node",
      "args": ["/path/to/kronan-mcp/dist/index.js"],
      "env": {
        "KRONAN_ACCESS_TOKEN": "<your-token>"
      }
    }
  }
}

API reference

The OpenAPI schema is saved at openapi-schema.yaml for reference.

Architecture

src/client.ts — HTTP client wrapping all Krónan API endpoints
src/index.ts — MCP server registering tools via @modelcontextprotocol/sdk
Auth: Authorization: AccessToken <token> header
Rate limit: 200 requests / 200 seconds per user
Monetary values are integers (ISK, no decimals)

Changes

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.

8d ago First seen · 43 lines · 249 tokens per session scan B 122118817382

Subscribe to this mod's changes

kronan-mcp CLAUDE.md is an instructions file published in the GitHub repository sandsower/kronan-mcp (15 stars, last pushed 4mo ago), licensed MIT. It adds 249 tokens to every session, about $0.0012 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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kronan-mcp: Instructions file for Claude Code