Trestle - Identity Data Enrichment and Validation APIs Trestle - Identity Data Enrichment and Validation APIs Trestle - Identity Data Enrichment and Validation APIs Trestle - Identity Data Enrichment and Validation APIs
  • Products
        • Enrichment

        • Reverse Phone APIGLOBAL
        • Verify and enrich phone numbers
        • Reverse Address API
        • Verify and enrich address information
        • Caller Identification API
        • Identify and enrich caller information
        • Add-Ons

        • Litigator Check
        • Identify phone numbers associated with serial litigators
        • Email Deliverability
        • Confirm email inboxes accept mail in real-time
        • Spam Check
        • Flag phone numbers tied to high-risk calling activity
        • Email Age Score
        • Score how long an email has existed
        • Validation & Verification

        • Phone Validation APIGLOBAL
        • Validate phone numbers and identify disconnected numbers
        • Real Contact API
        • Verify phone, email, and address information
        • Address Validation API
        • Validate and normalize addresses
        • Assess Risk

        • Decision Console
        • Optimize identity verification for manual review
        • Decision Signals API
        • Automate identity verification for risk decisioning
        • Start using Trestle products today

          Get started for free—no credit card required

          Start Your Free Trial

  • Solutions
        • Industries

        • B2B Contact Data
        • eCommerce
        • Insurance
        • Lead Generation
        • Real Estate
        • Communications
        • Use Cases

        • Verify and Prioritize Leads
        • Outbound Dialing Optimization
        • Assess Risk And Prevent Fraud
        • Inbound Call Routing and Verification​
        • Signup and Onboarding​
        • Optimize AI Voice Agents
        • Start using Trestle products today

          Get started for free—no credit card required

          Start Your Free Trial

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Trestle Overview

19
  • Does Trestle Offer DNC Checks?
  • Does Trestle Have a Sandbox Environment To Test Integrations?
  • What is Trestle’s Coverage and Accuracy?
  • Which Countries’ Data Do You Have?
  • Does Trestle Normalize Phone Number Format?
  • How Do You Integrate Trestle’s APIs?
  • How Does Trestle’s API Pricing Work?
  • How Often is Trestle’s Data Updated?
  • How to Properly Sample a Test File and Evaluate Trestle
  • Understanding NPA-NXX and the Implications of Number Portability
  • Understanding Trestle’s Free API Trial and the API Access Request Process for Specific Products
  • What are the Response Times for Trestle’s APIs?
  • What are the Various Sources of Trestle’s Identity Data?
  • What are Trestle’s SLAs?
  • What Demographic Data Does Trestle Have?
  • What Is Our Global Phone Validation Coverage?
  • What is the Default and Max QPS Supported?
  • What Queries are Billable?
  • What Security Measures are Taken by Trestle?

Product Features

39
  • Everything to Know About Source ID
  • Everything to Know About IP Trust Scores
  • How to Check When an Email Address Was Made
  • Everything to Know About Spam Checks
  • Using IP Intelligence Checks to Verify Lead Legitimacy in Real Contact API
  • Everything to Know About Phone-to-Address Match
  • Real Contact API 1.1 vs. Real Contact API 2.0: What’s Changed and How to Upgrade
  • Everything to Know About Phone Activity Score
  • Everything to Know About Real Contact API 2.0
  • How Trestle’s Activity Score is Different From HLR Lookups
  • Everything To Know About Name Match Details
  • Everything To Know About Phone-to-Name Confidence Score
  • Everything To Know About Litigator Checks
  • Everything To Know About the Email Age Score Add-on
  • Everything To Know About the Email Deliverability Add-on
  • Explain Real Contact API Grading
  • Fine-Tuning Find Person API Results
  • How Can Trestle’s Email Data Be Used?
  • How Do I Determine Phone Validity?
  • How Do You Read Trestle’s Phone Activity Score?
  • How Does Our Real Contact API Name Matching Work?
  • How Does Trestle Assess Email Validity in Real Contact?
  • How is Trestle’s Phone Activity Score Calculated?
  • How To Read the Real Contact Data Assessment Report
  • International Reverse Phone API Explained
  • Line Type Fidelity and Confidence
  • Trestle API Response Attribute Ranking
  • Trestle Warnings – A Comprehensive Guide
  • Understanding the Difference: Phone Validity vs. Trestle’s Activity Score
  • What are the Different Address Types Returned by Trestle?
  • What Does a Name Match of Null Mean?
  • What Does the Carrier Name Mean?
  • What is the Difference Between CNAM and Trestle’s Smart CNAM API?
  • What is the Difference Between Fixed VoIP and Non-fixed VoIP?
  • What is the Difference Between Reverse Phone API, Caller Identification API, and Smart CNAM API?
  • What is the Link Date Associated with Phones and Addresses?
  • Why and When to Use Trestle’s Name Hint
  • Why Do We Return a Maximum of 100 Entities in Find Person API?
  • Why Does the Address Return as Invalid?

Integrations

22
  • HubSpot | Phone Validation App Integration Guide
  • ZoomInfo | Phone Validation, Real Contact, and Reverse Phone Integration Guide
  • Databar | Phone Validation Integration Guide
  • Make | Real Contact API Integration Guide
  • Make | Phone Validation API Integration Guide
  • Apollo | Phone Validation Integration Guide
  • HighLevel | Phone Validation Integration Guide
  • boberdoo | Real Contact API Integration Guide
  • Clay | Validate Phone Number Integration Guide
  • Clay | Verify Contact Integration Guide
  • HubSpot | Real Contact Phone Grading App Integration Guide
  • How Do I Use a HubSpot List To Grade My Contacts?
  • How Do I Use HubSpot Workflow Triggers To Grade My Contacts?
  • Lead Prosper | Phone Validation Integration Guide
  • Lead Prosper | Real Contact Integration Guide
  • Reverse Phone API Enrichment of Leads in Google Sheets via Zapier
  • Snowflake | Phone Validation Integration Guide
  • What is the Phone Validation Integration within ActiveProspect?
  • What is the Real Contact Integration within ActiveProspect?
  • Validate and Verify Leads with Trestle’s Phone Validation API in Sierra Interactive via Zapier
  • Validate Leads with Trestle’s Phone Validation API in LeadConnector via Zapier
  • Zapier | Grade Leads from a Google Sheet with Real Contact

Troubleshooting

9
  • How to Prevent 429 Errors by Sizing API Concurrency to Your QPS Limit
  • How to Fix 403 Forbidden Errors When Using Trestle’s APIs
  • Why Won’t My Email Work to Signup for Trestle?
  • Ruby Integrations: 403 Forbidden Errors
  • Getting 429: Too Many Requests Error – Why?
  • How to Remove or Deactivate a User in Trestle’s Developer Portal
  • How to Update Phone to Name/Address Linkage Records
  • Reviewing Usage Data
  • Why is the Name Associated with the Phone Incorrect?

Developer Portal

8
  • Business Verification Failed? Here’s What Documents You Need to Submit
  • How to Find and Download Your Receipt or Invoice
  • How to Monitor API Errors With Your Usage Graph
  • Batch Upload FAQ
  • Developer Portal Wallet Frequently Asked Questions
  • Export and Analyze Your Queries in Your Developer Portal Account
  • Getting Started with Trestle’s Developer Portal Wallet
  • Making Changes to Billing Settings for the Developer Portal Wallet

User Guides

9
  • Phone Validation in Java
  • Batch Upload Instructions
  • How Do I add Additional Members to My Trestle Account?
  • How to Handle Special Characters in API Queries
  • Phone Validation API with ASP.NET
  • Phone Validation with JavaScript and HTML: Leveraging Trestle’s API
  • Phone Validation API with PHP: Leveraging Trestle’s API
  • Phone Validation API with Python
  • Phone Validation API with React

Telephony Knowledge

9
  • Choosing the Right Number Lookup API
  • How to Identify Callers In Real-Time Using a Reverse Phone API
  • Why is Line Type Intelligence Important?
  • What is a “No Routes Found” Phone Message?
  • The Best Phone Validation API for Call Centers
  • How to Identify Disconnected Phone Numbers Automatically
  • What is a Phone Number Reputation Lookup?
  • What is a Carrier Number?
  • What is a Non-Fixed VoIP Phone?

Risk Suite Overview

8
  • How to Read Email Breach Reports and IP Abuse Reports in Decision Console
  • Everything to Know About Decision Signals API
  • How to Get Started With Decision Console
  • What is the Decision Overview and How Do I Read It?
  • What is an Attribute Card and How Do I Read It?
  • What is Link Builder and How Do I Use It?
  • Understanding Team and Account Management
  • FAQ and Troubleshooting: Decision Console
  • Home
  • Knowledge Base
  • Integrations
  • HubSpot | Phone Validation App Integration Guide
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HubSpot | Phone Validation App Integration Guide

4 min read

Trestle’s HubSpot Phone Validation App validates contacts for businesses by assessing the quality of the phone number and whether it is connected or disconnected. This can be done automatically, manually, or triggered through a workflow.

In this guide, we cover:

  1. Installing Trestle’s Phone Validation App
    • Signing up with Trestle
    • Connecting HubSpot to Trestle
    • Adding your API key
    • Validating contacts manually
  2. Removing Trestle’s Phone Validation App
  3. Additional Resources
    • Using HubSpot Lists
    • Using Workflow Triggers
    • Support

How to Install Trestle’s Phone Validation App #

Step 1: Sign up for a Trestle Developer Account. #

If you already have a Trestle Developer Portal account, you can skip to Step 2.

This step will provide you with a Trestle API Key, which is needed for the app function. To sign up for a Trestle Developer Portal account, please visit the sign up page. This will require your business email address and phone number.

After you complete the email verification step, you will receive your API key and access to Phone Validation API.

Step 2: Connect your Trestle account to HubSpot and install the app. #

Use the installation link to connect your Trestle account to HubSpot.

First, select which account you’d like to use.

Next, accept the access terms that Trestle requires for your HubSpot account by checking the box and clicking “Connect app.” This step can take a couple tries as it doesn’t always seem to authenticate on the first go. When completed, it will say “Connection Successful.”

Step 3: Add App Card to Contact Side-bar. #

Click the “Shop” icon and navigate to “Connected Apps.”

Select “Trestle Phone Validation” from the list.

Navigate to “Settings,” then “Manage Location.”

Click the checkbox to ensure that the app card will display on a contact page.

Step 4: Add your API Key. #

Navigate to any Contact page, and you will see “Trestle Phone Validation” as one of the apps in the right-hand sidebar towards the bottom. You can rearrange the order of these sidebar app cards.

Click on “Manage Extension” in the right sidebar of HubSpot Contacts.

To connect your Trestle account on HubSpot, you need to add your API key from the Developer Portal. 

Click copy and paste the key into the “Your Trestle API Key” field in HubSpot.

If you would prefer to manually validate contacts, use workflows or lists and do not want contacts to be validated automatically, uncheck the “Auto validate” box.

Select the properties that you want to validate for each contact and click “Save.” You can then close this window. You can find these properties in the Properties tab of your settings in the “Trestle Phone Validation” group.

Once your account has been connected, you are all set. New contacts added to HubSpot will be automatically validated with this configuration. 

Validating Contacts Manually #

To manually validate a contact in HubSpot, select any Contact. Scroll down to the app in the right side panel and click the “Actions” button.

Click “Update Contact” and the contact will be validated with fresh information.

#

How to Uninstall Trestle’s Phone Validation App #

Step 1: Access your installed apps. #

Navigate to your installed apps. This can be found if you hover over the Marketplace icon in HubSpot.

Select “Connected Apps.”

#

Step 2: Uninstall #

Locate the Phone Validation app from the Connected Apps page and click the “Actions” drop-down menu.

Click “Uninstall” and the app will be removed from your HubSpot account.

Please note: The properties created when this app was installed will not be removed. If these contact properties contain validation data, this data will still be accessible even once the app has been uninstalled.

#

Additional Resources #

Use HubSpot Lists to Validate Contacts #

This option allows you to use filtering criteria in HubSpot lists to create a set of contacts that you want to validate. Once the list is created, it will be available in the Trestle Developer Portal for processing. Once the list is complete, a CSV export can be downloaded from Trestle and imported back into HubSpot. Instructions on using the Lists feature can be found here.

Use Workflow Triggers to Selectively Validate Contacts #

This option allows you to add the Phone Validation App in a HubSpot workflow and use specific conditions to trigger the validation. This can be used to selectively validate new contacts added to HubSpot or selectively validate historical contacts in HubSpot before the app installation. More details on setting up Phone Validation within workflows can be found here.

Helpful Details and Support  #

Please see our other guides for additional configuration options:

  • Use HubSpot Lists
  • Use Workflow Triggers

If you have any questions, please email us at support@trestleiq.com. For installation issues, please include your HubSpot ID in your email, so we can identify your instance in our logs and provide assistance.

Updated on July 30, 2026
Zapier | Grade Leads from a Google Sheet with Real ContactZoomInfo | Phone Validation, Real Contact, and Reverse Phone Integration Guide
Table of Contents
  • How to Install Trestle’s Phone Validation App
    • Step 1: Sign up for a Trestle Developer Account.
    • Step 2: Connect your Trestle account to HubSpot and install the app.
    • Step 3: Add App Card to Contact Side-bar.
    • Step 4: Add your API Key.
    • Validating Contacts Manually
  • How to Uninstall Trestle’s Phone Validation App
    • Step 1: Access your installed apps.
    • Step 2: Uninstall
  • Additional Resources
    • Use HubSpot Lists to Validate Contacts
    • Use Workflow Triggers to Selectively Validate Contacts
    • Helpful Details and Support 
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Company

  • About Us
  • Why Trestle
  • Careers
  • Affiliate Program
  • Contact

Products

  • Reverse Phone API
  • Reverse Address API
  • Caller Identification API
  • Phone Validation API
  • Real Contact API
  • Address Validation API
  • Batch Upload
  • Litigator Check Add-on
  • Free Lead Assessment

Use Cases

  • Outbound Dialing Optimization
  • Inbound Call Routing and Verification
  • Signup and Onboarding
  • Lead Verification
  • Optimize AI Voice Agents

Resources

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  • Case Studies
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  • Data Dictionary
  • Changelog
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  • Do Not Sell My Personal Information
Trestle - Identity Data Enrichment and Validation APIs
  • Products
        • Enrichment

        • Reverse Phone APIGLOBAL
        • Verify and enrich phone numbers
        • Reverse Address API
        • Verify and enrich address information
        • Caller Identification API
        • Identify and enrich caller information
        • Add-Ons

        • Litigator Check
        • Identify phone numbers associated with serial litigators
        • Email Deliverability
        • Confirm email inboxes accept mail in real-time
        • Spam Check
        • Flag phone numbers tied to high-risk calling activity
        • Email Age Score
        • Score how long an email has existed
        • Validation & Verification

        • Phone Validation APIGLOBAL
        • Validate phone numbers and identify disconnected numbers
        • Real Contact API
        • Verify phone, email, and address information
        • Address Validation API
        • Validate and normalize addresses
        • Assess Risk

        • Decision Console
        • Optimize identity verification for manual review
        • Decision Signals API
        • Automate identity verification for risk decisioning
        • Start using Trestle products today

          Get started for free—no credit card required

          Start Your Free Trial

  • Solutions
        • Industries

        • B2B Contact Data
        • eCommerce
        • Insurance
        • Lead Generation
        • Real Estate
        • Communications
        • Use Cases

        • Verify and Prioritize Leads
        • Outbound Dialing Optimization
        • Assess Risk And Prevent Fraud
        • Inbound Call Routing and Verification​
        • Signup and Onboarding​
        • Optimize AI Voice Agents
        • Start using Trestle products today

          Get started for free—no credit card required

          Start Your Free Trial

  • Pricing
  • Resources
        • API Documentation
        • Blog
        • Knowledge Base
        • Case Studies
        • Glossary
        • Partners and Integrations
  • Company
        • About Us
        • Why Trestle
        • Careers
        • Affiliate Program
        • Contact
  • Log In
  • Start for Free