Verifies cold emails and guesses addresses from CSV leads (first name, last name, company) using Clearbit domains and ValidEmail.co or Reacher validation.
npx claudepluginhub varnan-tech/opendirectory --plugin opendirectory-gtm-skillsThis skill uses the workspace's default tool permissions.
This skill autonomously processes a CSV of leads (containing First Name, Last Name, and Company Name), discovers their corporate domain, generates professional email permutations, and strictly verifies their deliverability.
Automates Hunter.io email intelligence: search domains for addresses, find specific contacts, verify deliverability, manage leads, monitor usage—via natural language through Composio MCP.
Validates email addresses in a contact CSV using a verification provider API, removes invalid/do_not_mail/abuse/unknown ones, and outputs a cleaned CSV for campaign sending.
Enriches company lists with 5-10 key decision makers' names, titles, verified emails, and LinkedIn URLs using Parallel, Apollo, and MillionVerifier APIs.
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This skill autonomously processes a CSV of leads (containing First Name, Last Name, and Company Name), discovers their corporate domain, generates professional email permutations, and strictly verifies their deliverability.
It is designed to solve the problem of missing contact info by guessing core email angles and then checking which one is real.
You don't need to provide emails in your CSV! If the CSV only contains First Name, Last Name, and Company Name, the script will automatically:
Once the emails are guessed, the script must verify them. We support three methods:
The absolute best option. ValidEmail.co provides enterprise-grade accuracy, bypasses strict catch-all servers, and handles IP reputation for you.
If you want a 100% free, open-source solution, you can host the Reacher backend yourself on a cloud provider (like AWS, GCP, or Hetzner).
You can run the Reacher CLI directly on your laptop.
First, ensure dependencies are installed: pip install -r requirements.txt
To use ValidEmail.co (Recommended):
ash export VALIDEMAIL_API_KEY="your_api_key_here" python scripts/email_verifier.py --input leads.csv --output verified_leads.csv --mode validemail
To use Self-Hosted Reacher:
ash python scripts/email_verifier.py --input leads.csv --output verified_leads.csv --mode reacher-http --reacher-url "http://your-server-ip:8080/v0/check_email"
The input CSV must contain these exact column headers (or their specific mappings):