Integration guide · CRM
Phone validation for Close
Close is a sales CRM with built-in calling, SMS and email. TrueSearch does not have a native Close app. You can check the phone numbers you work with in Close, using an automation tool such as Zapier, Make or n8n or CSV export and import. Every number comes back marked valid or dead, mobile, landline or VoIP, with carrier.
Option 1: connect through an automation tool
Use Close as the trigger in an automation tool (for example, a new contact or lead), add an HTTP step that sends the phone number to the TrueSearch API, then write the result back to Close or route the record based on keep.
Option 2: CSV export and import (no code)
- Export the contacts, leads or list you want to check from Close as a CSV file (if your account role allows exporting).
- Upload the file to TrueSearch. CSV and Excel both work, and the phone column is found automatically.
- Download the clean file. Every row gets valid, line_type and carrier columns, so you can filter out dead, landline or VoIP numbers.
- Import the clean file back into Close, or use it to update or tag the records you checked, the same way you normally import a list.
Results come back in about 30 seconds per 1,000 numbers.
What TrueSearch for Business does
| Valid or dead (disconnected / not assigned) | Yes, every number |
| Line type: mobile, landline, VoIP, toll-free | Yes, every number |
| Carrier name | Yes, every number |
| Bulk upload (CSV or Excel) | Yes, results in about 30 seconds per 1,000 numbers |
| REST API | Yes (JSON, one API key) |
| Claude / ChatGPT / Cursor connector (MCP) | Yes |
| National or state Do Not Call check | No, not yet |
| Known TCPA litigator check | No, not yet |
| FCC Reassigned Numbers Database check | No |
| Starting price | $97/month for 5,000 numbers, 7-day free trial |
| One-off list | $20 per 1,000 numbers, no subscription |
Upload a CSV or Excel file. Get back every number marked valid or dead, mobile, landline or VoIP, with carrier.
Starter: $97/month for 5,000 numbers after the 7-day trial. Cancel anytime.
Questions
Is there a native TrueSearch app for Close?
No. TrueSearch does not have a native Close app and is not affiliated with Close. You connect them yourself with an automation tool such as Zapier, Make or n8n or CSV export and import, as described on this page.
What comes back for each number?
Whether the number is valid, its line type (mobile, landline, VoIP or toll-free), its carrier, and keep: true when the number is valid and mobile. Rows that are not kept include the reason, such as landline, voip or invalid.
How many numbers per API call?
Up to 1,000 numbers per request. Each number with a valid format uses one credit from your plan.
Does TrueSearch check Do Not Call or litigator lists?
No, not yet. Run DNC and litigator checks separately where they apply to your calls and texts.
Can I try it first?
Yes. The Starter plan has a 7-day free trial that covers 250 numbers. After the trial it is $97/month for 5,000 numbers, cancel anytime. A one-off list is $20 per 1,000 numbers.
Other integration guides
Close is a trademark of its owner, used here only to identify the product. TrueSearch is not affiliated with, endorsed by or a partner of Close. This guide is general information, not legal advice. TrueSearch for Business checks validity, line type and carrier from licensed telecom data. It does not check the National Do Not Call Registry, state DNC lists or the FCC Reassigned Numbers Database. Not a consumer reporting agency; not for FCRA purposes.