1Lookup

1Lookup helps you validate and qualify leads automatically by verifying email addresses and phone numbers before you call, text, or email. Use it to reduce bad data, improve deliverability, protect sender reputation, and increase contact rates.

What this app does

This app provides two actions: Email Validation and Phone Validation, so you can enrich contacts with clear, actionable signals such as validity, deliverability/reachability indicators, risk flags, and recommended decisions (approve / review / block). This enables smarter routing and cleaner CRM data.

Key benefits

• Reduce bounces and undeliverable emails by filtering risky or invalid addresses

• Increase call/SMS success rates by validating phone numbers and line types

• Protect sender reputation by avoiding disposable/catch-all/low-quality emails

• Improve lead quality by flagging suspicious or high-risk contact data

• Automate list hygiene to prevent wasted outreach and duplicated effort
  

Actions included

Email Validation

Validates an email address and returns deliverability and risk signals. Outputs may include:

• Syntax validity

• Domain / MX status

• Deliverability status (e.g., safe, risky, unknown)

• Risk level + risk factors (e.g., catch-all, privacy protected, disposable)

• Confidence level / score (when available)

• Recommendation (approve / review / block)
  

Phone Validation

Validates a phone number and returns carrier/line-type and risk signals. Outputs may include:

• Format validity + country/region parsing

• Line type (mobile / landline / VoIP)

• Carrier lookup (when available)

• Risk indicators (e.g., invalid, VoIP for strict flows)

• Recommendation (approve / review / block)
  

Setup & usage

1. Install the app

2. Connect your API key

3. Add Email Validation and/or Phone Validation actions to your workflows

4. Use the returned fields to drive conditions, tags, and routing