email-verification | sccsadmin11/outbound-gtm-sc

What it does when it runs

Verify every email with MillionVerifier, send catch-all and unknown results to BounceBan, and output only safe-to-send emails in verified_leads.csv.

Automated analysis of the skill and the 3 files bundled beside it. A skill’s own description is written to be selected by an agent, so it describes the job and not the dependencies.

Keys and connectors you must supply: BOUNCEBAN_API_KEY
MILLIONVERIFIER_API_KEY
Hosts it reaches: api-waterfall.bounceban.com
api.millionverifier.com
app.millionverifier.com
bounceban.com
developer.millionverifier.com
www.linkedin.com
Tool permissions it declares: No allowed-tools in the frontmatter. It does act, so it runs under whatever permissions your session already grants.
Actions present in the files: shell

Ask about email-verification

Opens your assistant with this page's recorded context. Check the linked sources before relying on it.

Is this safe to install?Claude ChatGPT

Adapt it to my stackClaude ChatGPT

What else do I need for it to workClaude ChatGPT

Rather ask a human? Talk to Cheetah

Install it

View source on GitHub ↗

git clone --depth 1 --filter=blob:none --sparse https://github.com/sccsadmin11/outbound-gtm-sc.git /tmp/outbound-gtm-sc
git -C /tmp/outbound-gtm-sc sparse-checkout set "06-email-verification"
mkdir -p ~/.claude/skills/email-verification
cp -R "/tmp/outbound-gtm-sc/06-email-verification/." ~/.claude/skills/email-verification/

Picked up without a restart. A project skill of the same name is shadowed by your personal one. For one repository only, swap ~/.claude/skills for .claude/skills. Claude Code docs ↗

The folder is the same in every client that implements the format — 46 of them — so if yours is not above, only the destination changes.

Before you install: this skill will not complete its job on a bare agent. It needs BOUNCEBAN_API_KEY, MILLIONVERIFIER_API_KEY, which you have to obtain separately.

The skill

Source on GitHub ↗

Reproduced in full from sccsadmin11/outbound-gtm-sc/blob/fc996416957ff6232cc00c3b5c94d601b68e1d61/06-email-verification/SKILL.md, which is licensed MIT (repository). 247 words, 9 headings.

06 Email verification

Purpose

Protect the new inboxes. Bounces burn domain reputation fast, so only emails that pass verification move on.

Inputs

leads_with_email.csv from skill 05.

Outputs

verified_leads.csv: safe-to-send rows only, plus verify_mv, verify_bb, verify_reason.
rejected_emails.csv: everything else, with the reason.

Duplicate emails are removed before any credit is spent.

Env vars

Var	Where to get it
`MILLIONVERIFIER_API_KEY`	https://app.millionverifier.com/api
`BOUNCEBAN_API_KEY`	https://bounceban.com/app/api/settings

Rules

MillionVerifier result	Next	Safe?
`ok`	none	yes
`catch_all`	BounceBan `mode=deepverify`	only if BounceBan says `deliverable`
`unknown`	BounceBan `mode=regular`	only if BounceBan says `deliverable`
`invalid`, `disposable`	none	no

--allow-risky also keeps BounceBan risky. Off by default.

Calls

MillionVerifier: GET https://api.millionverifier.com/api/v3/?api=KEY&email=...&timeout=10
BounceBan: GET https://api-waterfall.bounceban.com/v1/verify/single?email=...&mode=... with header Authorization: KEY. A 408 means it is still verifying; the script re-sends the same request, which is free within 30 minutes.

Steps (agent run instructions)

Count first:

python 06-email-verification/scripts/verify_emails.py --leads leads_with_email.csv --dry-run

Try the logic for free with MillionVerifier's demo keys (fake results, no credits):

MILLIONVERIFIER_API_KEY=API_KEY_FOR_OK python 06-email-verification/scripts/verify_emails.py --leads 05-email-waterfall/examples/leads_with_email.csv --out /tmp/v.csv

Run for real:

python 06-email-verification/scripts/verify_emails.py --leads leads_with_email.csv

Report safe vs rejected counts and the top rejection reasons.

Handoff

verified_leads.csv -> 07-copy-generator. Skill 11 re-checks that every lead in the campaign is in this file.

Files bundled with it

These load only when the skill asks for them, so they cost nothing until it runs.

Other skills for the same job

Different authors, same problem. Matched on the words in the skill name, across every library in the catalogue except this one.

email-verification by extruct-ai · 111
Email Verification by SamurAIGPT · 4
looot-email-verification by ay-automate · 0
email-verification by ogikicollins · 0
cold-email by coreyhaines31 · 57,918
email-sequence-writer by irinabuht12-oss · 6,620
cold-email-kickoff by growthenginenowoslawski · 797
cold-email-starter-kit by growthenginenowoslawski · 797

Need help setting it up?

This page tells you what email-verification does and what it needs. Cheetah builds the agent setup it runs inside: data, CRM, sequencing and the guardrails.

Book a call →

The directory stays free. There is nothing gated behind this.