What is noxctl CLAUDE.md?

Project instructions for noxctl, a command-line tool and MCP server for Fortnox accounting. Fortnox is an accounting service, and the instructions cover invoices, customers, bookkeeping, and VAT.

Use them to list customers or invoices, retrieve invoice PDFs, create or update invoices, send invoices, perform dry runs, and follow the project’s backlog and status conventions.

They clarify which interface to prefer, how to read data safely, and how to preview changes before making them. This reduces accidental accounting changes and keeps operational work traceable through GitHub Issues.

How Magnus-Gille/noxctl configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Magnus-Gille/noxctl. 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/Magnus-Gille/noxctl/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Magnus-Gille/noxctl

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/magnus-gille/noxctl/claude-md/github.svg)](https://agentmods.dev/instructions/magnus-gille/noxctl/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/magnus-gille/noxctl/claude-md"><img src="https://agentmods.dev/badge/instructions/magnus-gille/noxctl/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/magnus-gille/noxctl/claude-md"><img src="https://agentmods.dev/badge/instructions/magnus-gille/noxctl/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 747 This file is loaded in full into every session.

When invoked 747 The same file — it is already loaded in full.

Security scan A 0 findings. 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	$0.00747	$0.00747
Opus 5.5	$0.00299	$0.00299
Sonnet 5.5	$0.00149	$0.00149
Haiku 4.5	$0.00075	$0.00075

Measured 11d ago against content hash a6872cd7a858, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

noxctl 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 11d 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.

CLAUDE.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — noxctl

What is this?

CLI and MCP server for Fortnox accounting (invoices, customers, bookkeeping, VAT).

CLI-first in Claude Code

Prefer the CLI over MCP tools when running in Claude Code. The MCP server exists for environments without a shell (Claude Desktop, Web, Mobile).

# Reading data
noxctl invoices list
noxctl invoices list --output json
noxctl customers get 25

# Invoice PDFs (read-only — uses /preview, does not mark the invoice as sent)
noxctl invoices pdf 28                       # -> invoice-28.pdf
noxctl invoices pdf 28 --file /tmp/f.pdf
noxctl invoices pdf 28 --mark-sent --yes     # ALSO flags it as sent (mutation)

# Writing data (prompts for confirmation on TTY; use --yes to skip)
echo '{"InvoiceRows": [...]}' | noxctl invoices update 28 --input - --yes
noxctl invoices send 28              # prompts: Continue? [y/N]
noxctl invoices send 28 --yes        # skip prompt (non-interactive/scripting)

# Dry run first
noxctl invoices create --customer 25 --input data.json --dry-run

Work tracking

The maintainer's Plane project NOX is the canonical operational backlog. GitHub Issues on this public repo are only an intake for outside reports; an agent moves an actionable report into a Plane ticket and closes the GitHub issue with a link to it. See TODO.md for the long-lived roadmap and instructions for adding new resources, and STATUS.md for the current execution handoff.

Project structure

src/operations/ — Fortnox API calls (shared by CLI and MCP)
src/tools/ — MCP tool registrations (Zod schemas)
src/cli.ts — Commander CLI definitions
src/fortnox-client.ts — HTTP client with rate limiting and retry
src/views.ts — Column definitions for table output
src/formatter.ts — Table/JSON output formatting
api-spec/openapi-fingerprint.json — opaque per-endpoint/per-schema hashes of the Fortnox spec, for drift detection. The full spec is not committed (it's Fortnox's call structure — Developer Agreement cl. 6.1/6.3); it's fetched on demand into the git-ignored api-spec/openapi.json cache.
scripts/check-api-changes.sh + scripts/api-fingerprint.py — drift checker (npm run check:api; used by CI)

Read the full file on GitHub · 68 lines

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.

11d ago Changed · +3 lines · +49 tokens per session a6872cd7a858
2mo ago First seen · 65 lines · 698 tokens per session scan A d1e587424cf0

Subscribe to this mod's changes

noxctl CLAUDE.md is an instructions file published in the GitHub repository Magnus-Gille/noxctl (18 stars, last pushed 2d ago), licensed MIT. It adds 747 tokens to every session, about $0.0030 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 2026-08-30.

Finance and fintech accounting automation bookkeeping cli fortnox invoicing

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noxctl: Instructions file for Claude Code