ownership-enrichment

ownership-enrichment is a skill for Claude Code from sorrek/mcp. It costs 81 tokens per session (710 once invoked), scanned A, original, MIT.

A tool that adds parent-company and private-equity ownership information to a company list in a CSV or spreadsheet.

In plain words
What is it for?
Use it to enrich account lists using company domains, then download a file with ownership data joined back to the original records.
Why use it?
It avoids researching each company’s ownership structure by hand while keeping the original rows and columns in the returned file.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the magellan-data plugin — 3 skills, 2 MCP servers shipped together

Good fit Use it to enrich account lists using company domains, then download a file with ownership data joined back to the original records.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sorrek/mcp/ownership-enrichment
Install

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.

Any agent
npx skills add sorrek/mcp --skill ownership-enrichment
Clone the repo
git clone --depth 1 https://github.com/sorrek/mcp

Made for: Claude Code.

Or install magellan-data, the plugin that ships this one along with the rest of its 3 skills, 2 MCP servers.

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.

agentmods badge for ownership-enrichment

README.md
[![agentmods](https://agentmods.dev/badge/skills/sorrek/mcp/ownership-enrichment/github.svg)](https://agentmods.dev/skills/sorrek/mcp/ownership-enrichment)
Your own site
<a href="https://agentmods.dev/skills/sorrek/mcp/ownership-enrichment"><img src="https://agentmods.dev/badge/skills/sorrek/mcp/ownership-enrichment/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.

agentmods 80×15 button for ownership-enrichment

Your own site · 80×15
<a href="https://agentmods.dev/skills/sorrek/mcp/ownership-enrichment"><img src="https://agentmods.dev/badge/skills/sorrek/mcp/ownership-enrichment.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 710 The whole file, excluding the scripts and references it only reads on demand.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00081 $0.00710
Opus 5 $0.00041 $0.00355
Sonnet 5 $0.00016 $0.00142
Haiku 4.5 $0.00008 $0.00071

Measured 8d ago against content hash c9fa6d54fea4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ownership-enrichment 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 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.

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.

skills/ownership-enrichment/SKILL.md · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Ownership Enrichment

Take the user's account list, append ownership columns, hand back a file in the same shape they gave you.

Steps

  1. Read the file and find the domain column. Look for website, domain, url, or company_url. Report how many rows have a usable domain and how many don't — rows without one can't be enriched and shouldn't be silently dropped.

  2. Quote the cost ceiling up front. parent_companies and pe_ownership are both 70 credits per URL where something is found — a URL with no parent / no PE owner is free. That means you can state an exact maximum before anything runs:

    200 valid domains × 70 credits × 2 output types = at most 28,000 credits — less if some companies have no parent or aren't PE-backed. The exact price is on each completed run before downloading.

    Check the balance with check_credits and confirm the user wants to proceed. If they only need one of the two types, say so — it halves the ceiling.

  3. Run the pipeline. submit_batch(domains)process_batch(batch_id, types) → poll get_run_status every 10–30 seconds until completed. Large batches take minutes. Don't poll in a tight loop.

  4. Download and join. Fetch the CSV from the download link (no auth header needed) and join back to the original rows on input_url. Preserve every original column and every original row, including the ones that couldn't be enriched — leave those cells blank rather than dropping the row.

  5. Write the output. Same format the user gave you. If they uploaded .xlsx, give back .xlsx. Name it clearly, e.g. accounts_enriched.xlsx.

  6. Summarize. How many matched, how many are PE-backed, how many are subsidiaries, and anything that stands out — a cluster of accounts under one parent is worth flagging unprompted.

Suggested columns to append

Column Source
parent_company parent_companies
parent_company_url parent_companies
is_pe_backed derived from pe_ownership
pe_firm pe_ownership
pe_firm_url pe_ownership
deal_type pe_ownership

Read the full file on GitHub · 61 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.

  1. 8d ago Changed · +3 lines c9fa6d54fea4
  2. 12d ago First seen · 58 lines · 81 tokens per session scan A c5966d282717

Subscribe to this mod's changes

ownership-enrichment is a skill published in the GitHub repository sorrek/mcp (1 stars, last pushed 12d ago), licensed MIT. It adds 81 tokens to every session and 710 once invoked, about $0.0004 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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