northdata-cli 0.1.0

Kommandozeilen-Client für die NorthData-API mit Credit Guard.

northdata-cli

A command-line client for the NorthData API with a built-in credit guard.

northdata-cli wraps the relevant NorthData endpoints (suggest, power search, company, person, publications, reference, billing) behind a clean, installable CLI. It is usable interactively by humans and unattended by scripts or agents — every command emits JSON by default and a pretty table with --pretty.

Why a credit guard? NorthData charges per returned company, not per HTTP call. A single search --limit 100 can burn 100 credits in one request. This CLI refuses unapproved high-limit calls and keeps a local append-only log of every billed call it makes.

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Installation

Regular install (Recommended)

pipx install northdata-cli
# or
pip install northdata-cli

One-shot via uvx (no install)

uvx northdata --help

Editable install for development

git clone https://github.com/p-meier/northdata-connectors.git
cd northdata-connectors/northdata-cli
python -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"

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Configuration

API key (required)

Set the NORTHDATA_API_KEY environment variable:

export NORTHDATA_API_KEY="XXXX-XXXX"

Or pass it per invocation:

northdata suggest "Example GmbH" --api-key XXXX-XXXX

Get a key at https://www.northdata.com.

Optional: credit guard thresholds

export NORTHDATA_APPROVAL_THRESHOLD=25   # above this, --approve-high-cost is required
export NORTHDATA_ABSOLUTE_MAX=100        # absolute ceiling for --limit
export NORTHDATA_CREDIT_LOG=~/.northdata/credits.jsonl  # override log path

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Quickstart

# Free: discover what the API knows about a company name
northdata suggest "Siemens" --pretty

# Free: show your current credit usage for the period
northdata billing --pretty

# Billed (1 credit): full company profile by register
northdata company --register "HRB123456/Muenchen" --pretty

# Billed (up to --limit credits): power search with filters
northdata search \
    --segment-codes "62|63" \
    --legal-forms "GmbH|UG" \
    --address "Munich" --max-distance-km 150 \
    --revenue-min 5000000 --revenue-max 50000000 \
    --limit 5 --pretty

# Peek without spending credits
northdata search --segment-codes "62" --legal-forms "GmbH" --limit 5 --dry-run

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Credit guard

Every billable command respects a two-tier ceiling on --limit:

Tier	Default	Override
Approval threshold (requires --approve-high-cost to exceed)	25	NORTHDATA_APPROVAL_THRESHOLD
Absolute maximum (hard stop, flag-immune)	100	NORTHDATA_ABSOLUTE_MAX

On top of that, every billed call is appended to ~/.northdata/credits.jsonl:

northdata credits --pretty

The local log is informational — the NorthData billing endpoint (northdata billing) remains the source of truth for actual credit consumption.

--dry-run

Any billable command with --dry-run builds the request URL and returns it without calling the API. Zero credits spent.

northdata company --register "HRB123456/Muenchen" --dry-run

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Command reference

Command	Billed	Purpose
suggest QUERY	—	Autocomplete for company / person names
search [filters]	up to --limit	Power search
company --register | --name	1	Full company profile
person FIRST LAST	1	Person lookup (incl. birth date)
publications [--name | --register]	1	Publications (e.g. shareholder lists)
reference overview | segments	—	API reference data
billing	—	Current credit usage for the billing period
credits	—	Local credit log (this CLI only)

Use northdata COMMAND --help for the full option list.

Output formats

• Default: JSON on stdout, pipeable into jq and friends.
• --pretty / -p: Rich table on stderr-free stdout for humans.

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Exit codes

Code	Meaning
0	Success
2	Configuration error (missing key, bad argument)
3	Credit guard refused the request
4	NorthData API error (HTTP 4xx / 5xx / timeout)

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Development

pip install -e ".[dev]"
pytest
pytest --cov

Tests use httpx.MockTransport — no network access required for the unit test suite.

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License

MIT. See LICENSE.

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Project status

This CLI is the library layer for the northdata-mcp MCP server and the northdata Claude skill. The client and credit guard are written to be importable as a Python library so those layers can reuse them directly without shelling out.

See the monorepo root for the full picture.