Integration guide · Workspace
Phone validation for Slack
Slack is a messaging app for teams. TrueSearch does not have a native Slack app. You can check the phone numbers you work with in Slack, using an automation tool such as Zapier, Make or n8n. Every number comes back marked valid or dead, mobile, landline or VoIP, with carrier.
There is no TrueSearch Slack app. Slack is useful as the place results land: an automation tool checks the numbers through the API, then posts a summary to a channel.
Option 1: connect through an automation tool
Use Slack 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 Slack or route the record based on keep.
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 Slack?
No. TrueSearch does not have a native Slack app and is not affiliated with Slack. You connect them yourself with an automation tool such as Zapier, Make or n8n, 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
Slack is a trademark of its owner, used here only to identify the product. TrueSearch is not affiliated with, endorsed by or a partner of Slack. 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.