What is blitz-list-builder?

A lead-list builder that uses company website addresses to find decision-makers, such as owners, at those companies through the Blitz service.

Finding owners or other contacts for a list of domains, adding contacts to existing prospect lists, and producing a CSV for email enrichment or Smartlead upload.

It is useful when the target companies are already known but the right people at each company still need to be identified.

blitz-list-builder — Skill for Claude Code by AlexisMarasigan

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 AlexisMarasigan/coldoutboundskills --skill blitz-list-builder

Clone the repo

git clone --depth 1 https://github.com/AlexisMarasigan/coldoutboundskills

Made for: Claude Code.

Or install coldoutboundskills, the plugin that ships this one along with the rest of its 28 skills.

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/skills/alexismarasigan/coldoutboundskills/blitz-list-builder/github.svg)](https://agentmods.dev/skills/alexismarasigan/coldoutboundskills/blitz-list-builder)

Your own site

<a href="https://agentmods.dev/skills/alexismarasigan/coldoutboundskills/blitz-list-builder"><img src="https://agentmods.dev/badge/skills/alexismarasigan/coldoutboundskills/blitz-list-builder/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/skills/alexismarasigan/coldoutboundskills/blitz-list-builder"><img src="https://agentmods.dev/badge/skills/alexismarasigan/coldoutboundskills/blitz-list-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,921 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 100% copy Near-identical to another mod 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	$0.00084	$0.01921
Opus 5.5	$0.00034	$0.00768
Sonnet 5.5	$0.00017	$0.00384
Haiku 4.5	$0.00008	$0.00192

Measured 2mo ago against content hash 3c537d6380a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

blitz-list-builder 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/find-contacts.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

100% identical to blitz-list-builder — 14 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/blitz-list-builder/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blitz List Builder

Prospeo is title-first: "all VPs of Marketing in B2B SaaS." Blitz is domain-first: "for each of these 500 restaurant domains, find the owner."

If you already know the target companies (from Google Maps, a CSV of competitors, or a manually-curated list), Blitz finds the people for you.

When to use Blitz vs Prospeo

Your situation	Use
"I have 5,000 domains, find the owners"	Blitz
"Find all CFOs at US SaaS companies 100-500 employees"	Prospeo
"I need to supplement Prospeo results with additional contacts at the same companies"	Blitz
"I want the widest net possible in a vertical"	Prospeo
"I'm targeting specific named accounts (ABM)"	Blitz

Often: use Prospeo to build the initial list, then Blitz to add 1-2 more contacts per company.

Prerequisites

Blitz API key (env: BLITZ_API_KEY) — sign up at their website
List of target company domains (CSV with a company_domain column, or one domain per line)

Inputs

--domains-file=<path> — CSV or txt with company domains (one per line, or a column named company_domain)
--titles=<csv> — comma-separated title keywords to filter (default: owner,founder,ceo,president,cto,vp)
--out=<path> — CSV output path

Outputs

CSV with columns: company_domain, first_name, last_name, job_title, linkedin_url, email, email_source, company_name, company_industry, company_headcount, company_phone

Email will be populated when Blitz returns one. Use /email-waterfall skill on the output to fill in missing emails via Prospeo/ZenRows/etc.

Usage

export BLITZ_API_KEY=xxx

# Pull owner/founder/CEO contacts for 5000 SMB domains
npx tsx scripts/find-contacts.ts \
  --domains-file=restaurants.csv \
  --titles=owner,founder,ceo,general-manager \
  --out=restaurant-owners.csv

# Domain-first discovery with custom title match
npx tsx scripts/find-contacts.ts \
  --domains-file=saas-companies.txt \
  --titles=vp-marketing,head-of-growth,cmo,director-marketing \
  --out=saas-marketers.csv

Read the full file on GitHub · 171 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

scripts/find-contacts.ts 5.9 KB runs code

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.

2mo ago First seen · 171 lines · 84 tokens per session scan A 3c537d6380a7

Subscribe to this mod's changes

blitz-list-builder is a skill published in the GitHub repository AlexisMarasigan/coldoutboundskills (5 stars, last pushed 6mo ago), licensed MIT. It adds 84 tokens to every session and 1,921 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to blitz-list-builder, differing in 14 lines, and is treated as a copy.

Marketing and SEO

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