Close Phone & Email Validation Integration
Validate phone and email data automatically across Close, so your team works from clean, verified records.
The 1Lookup Close integration validates phone numbers and verifies emails inside Close. When a record is created or updated, 1Lookup checks the number's line type and carrier and the email's deliverability, then writes the result back so your team works Close from clean, reachable contacts instead of guesswork.
Why validate Close data with 1Lookup
Dirty contact data quietly distorts Close: skewed reports, wasted dials, and follow-up sent to addresses that bounce. Connecting 1Lookup verifies each phone number and email at the point of entry, so the records your team works in Close are real and reachable.
Validation results (line type, carrier, and email deliverability) are written back to Close fields, so they are available to scoring, list views, reports, and downstream automation. You can route reachable mobile numbers to SMS, suppress disposable or role-based emails, and keep your pipeline clean.
What you can do
Phone validation
Confirm a number is real and see its line type and carrier inside Close.
Email verification
Check deliverability and flag disposable and role-based addresses in Close.
Risk & spam signals
Surface spam-reported and high-risk numbers so Close records can be screened.
Bulk clean-up
Validate the contacts already in Close in bulk, not just new ones.
How to connect 1Lookup to Close
Create a 1Lookup account and API key
Sign up for a free 1Lookup account and generate an API key from the dashboard. Free-tier lookups let you test before rolling out.
Store the key securely
Keep the 1Lookup API key in your backend's secrets store (e.g. environment variables), not in client code.
Call the 1Lookup REST API
From your Close workflow, send the phone, email, or IP to validate and read the clean JSON response.
Map and persist
Write the validated fields back into Close for reporting and automation.
Use cases
Cleaner inbound leads
Validate phone and email the moment a record enters Close, so reps never chase a fake or undeliverable contact.
Trustworthy reporting
Segment Close on validated, reachable contacts so forecasts and dashboards reflect real opportunities.
Frequently asked questions
What does 1Lookup validate for Close?
1Lookup validates phone and email data. For phone numbers it returns validity, line type, and carrier; for emails it returns deliverability and detects disposable and role-based addresses. You choose which fields to store in Close.
Do I need to write code to use 1Lookup with Close?
Yes, this integration calls the 1Lookup REST API, so it suits developer workflows. You authenticate with an API key and map the JSON response into Close.
Can I validate records I already have in Close?
Yes. Alongside real-time validation, you can run existing Close records through 1Lookup batch validation and write the cleaned results back.
How long does setup take?
Setup is quick for most teams. The exact time depends on how many fields you map and whether you validate in real time, in bulk, or both.