APIs
Build Smarter with Versium APIs
Unlock consistent, real-time access to diverse and rich data sets to make informed decisions faster, more accurately, and grow cost-effectively than ever before.
Explore Versium's APIs
By connecting to Versium’s APIs, you unlock a world of possibilities. Seamlessly integrate our powerful data solutions into your marketing campaigns, CRM databases, and web applications. Gain a competitive edge with the highest quality and most accurate business and consumer information available.
Versium’s APIs
B2B Online Audience AppendB2C Online Audience Append
Consumer Audience Builder
Consumer to Business (C2B)
Contact Append
Demographic Append
Firmographic Append
HEM to Business Domain
IP to Domain Append
Predictive Scores
Account-Based List (ABM)
Persona-Based List (B2B)
Data Prep
Deduplication
Email Validation
SuppressionB2B Online Audience AppendB2B Online Audience Append
Supercharge Your B2B Marketing
Maximize your reach and connect with your target B2B audience online. Versium’s B2B Online Audience Append API dramatically improves match rates for your B2B lists.
Key capabilities of Versium’s B2B Online Audience Append API include:
- Appends multiple consumer contact points (i.e., emails, phones) to increase the likelihood of reaching prospects through online marketing campaigns.
- Export pre-formatted data for popular platforms like Adroll, Facebook, Google, LinkedIn, and more.
- Pre-formatted data includes appropriate headers for seamless integration with each platform.
- Utilize Versium’s B2B2C identity graph to reach your targets in more places and unlock unprecedented opportunities for online engagement.
B2C Online Audience AppendB2C Online Audience Append
Supercharge Your B2C Marketing
Maximize your online campaign impact by connecting with the right consumers across channels. Versium’s B2C Online Audience Append API enhances your consumer lists with actionable digital identifiers for improved targeting.
Key capabilities of Versium’s B2C Online Audience Append API include:
- Append hashed identifiers to consumer records to engage audiences across digital platforms.
- Match offline first-party data to online identifiers with high accuracy using Versium’s robust consumer identity graph.
- Receive audience data pre-formatted for leading platforms including Facebook, Google, LinkedIn, TikTok and more.
- Output includes platform-specific headers to ensure fast and seamless data upload.
- Empower your marketing teams to activate campaigns quickly, drive conversions, and achieve measurable results.
Consumer Audience BuilderConsumer Audience Builder
Design Your Ideal Consumer Segments
Build high-performing consumer audiences for omnichannel marketing. The Consumer Audience Builder API leverages Versium’s rich identity and demographic data to help you reach the right people, at the right time, with the right message.
Key capabilities of Versium’s Consumer Audience Builder API include:
- Audience Segmentation: Create segments based on interests, behaviors, life stage, and more.
- Custom Audience Delivery: Receive lists tailored for platforms like Facebook, Google, or programmatic display.
- Scalable Reach: Target consumers across digital, email, direct mail, and beyond.
Consumer to Business (C2B)Consumer to Business
Bridge Personal and Professional Data
Enhance your understanding of business professionals by connecting consumer identity data with business information. This powerful API bridges the gap between personal and work life, helping you create more holistic audience profiles.
Use Versium’s Consumer to Business Append API to:
- Link Consumer Emails to Professional Details: Understand where and how your contacts work.
- Strengthen B2B2C Campaigns: Personalize outreach across channels and devices.
- Discover New Opportunities: Uncover business affiliations for deeper segmentation.
Contact AppendContact Append
Expand Your Reach
Do you have partial contact information and need to fill in the gaps? Simply provide the information you have, and our API will leverage our vast databases to provide associated contact details, opening up new avenues for communication and engagement.
Versium’s Contact Append API empowers you to:
- Add Email Addresses: Connect with your audience through targeted email campaigns.
- Find Phone Numbers: Reach prospects and customers directly via phone.
- Complete Postal Addresses: Enhance your direct mail marketing efforts.
Demographic AppendDemographic Append
Know Your Audience
Go beyond basic contact information and gain a deeper understanding of your customers and prospects with Versium’s Demographic Append API. Enrich your records with valuable demographic details to segment and prioritize your marketing campaigns with laser precision.
Versium’s Demographic Append API comprises four comprehensive categories:
- Basic Demographics: Age, gender, location, and more
- Household Financial and Auto: Income, homeownership, vehicle information
- Lifestyle and Interests: Hobbies, preferences, and buying behaviors
- Political & Donor: Political affiliations and donation history
Firmographic AppendFirmographic Append
Understand The Companies You Target
Unlock deeper insights into the businesses you’re engaging with. The Firmographic Append API enriches your B2B contact records with company-level attributes, allowing you to refine segmentation, prioritize high-value leads, and personalize outreach.
With Versium’s Firmographic Append API, you can:
- Append Key Business Data: Company name, size, revenue, industry, and more.
- Improve Segmentation: Tailor campaigns by company profile for better engagement.
- Boost Targeting: Focus efforts on businesses that meet your ideal customer profile (ICP).
HEM to Business DomainHashed Email (HEM) to Business Domain
Connect Home and Work Identities
Today’s professionals toggle between personal and work identities. The Hashed Email (HEM) to Business Domain API links personal email addresses to professional domains, enabling smarter targeting and identity resolution.
Why use Versium’s HEM to Business Domain API?
- Unify Contact Records: Bridge the gap between personal and business contact points.
- Power Identity Graphs: Enhance the accuracy of audience profiles.
- Optimize Ad Spend: Target users across more devices and platforms.
IP to Domain AppendIP to Domain Append
Identify Anonymous Website Visitors
Turn anonymous traffic into actionable insights. The IP to Domain Append API matches visitor IP addresses to known business domains, giving your sales and marketing teams the power to act on website activity in real time.
With Versium’s IP to Domain, you can:
- Uncover Visitor Intent: See which companies are browsing your site.
- Enable Timely Outreach: Pass warm leads directly to sales teams.
- Enhance Retargeting: Fuel your ad campaigns with firmographic context.
Predictive ScoresPredictive Scores
Target Smarter. Convert Faster.
Prioritize leads and optimize outreach with data-driven intelligence. Versium’s Predictive Scores API helps you identify high-value prospects and customers using AI-powered scoring models.
Key capabilities of Versium’s Predictive Scores API include:
- Instantly score contacts or records based on likelihood to convert, engage, or exhibit a desired behavior—customized to your business goals.
- Focus efforts on top-performing segments and reduce wasted spend on low-potential leads.
- Access predictive scores on demand via API, enabling faster decision-making and dynamic audience targeting.
- Integrates directly with your existing CRM, marketing automation, or data workflows—no data science team required.
- Leverage Versium’s out-of-the-box models or bring your own scoring logic for complete flexibility.
Account-Based List (ABM)Account-Based List
Target the Right People in the Right Accounts
Support your Account-Based Marketing (ABM) strategy with tailored contact lists of decision-makers and influencers within your target accounts.
Use Versium’s ABM API to:
- Create Multi-Stakeholder Lists: Reach buying committees within key accounts.
- Align Sales and Marketing: Ensure outreach is focused and coordinated.
- Shorten Sales Cycles: Engage with the right contacts from the start.
Persona-Based List (B2B)Persona-Based List
Build Lists That Match Your Ideal Customer
Quickly generate highly targeted lists based on detailed B2B persona criteria—such as job title, industry, company size, and more. This API helps your marketing and sales teams focus on the right people at the right companies.
What you can do with Versium’s Persona-Based List API:
- Build Custom Audiences: Filter by dozens of persona attributes.
- Fuel Precision Campaigns: Deploy more relevant, high-performing outreach.
- Scale Outreach Faster: Generate qualified lead lists on demand.
Data PrepData Prep
Get Your Data Campaign-Ready
Clean, standardize, and structure your data before activation. The Data Prep API ensures your datasets are formatted correctly for enrichment, segmentation, and campaign use.
Versium’s Data Prep API helps you:
- Fix Formatting Issues: Standardize fields like names, addresses, and emails.
- Improve Match Rates: Enhance compatibility with enrichment and audience APIs.
- Save Time: Automate tedious data hygiene tasks.
Enable AI-Ready Data: Clean, consistent, and well-structured datasets that improve machine learning model training, prediction accuracy, and downstream automation.
DeduplicationDeduplication
Keep Your Data Clean and Accurate
Maintain the integrity of your datasets by identifying and prioritizing duplicates. The Deduplication API ensures you’re working with clean, accurate records for analytics, enrichment, and campaign activation.
With Versium’s Deduplication API, you can:
- Eliminate Redundancy: Avoid duplicate outreach and inflated counts.
- Improve Targeting Accuracy: Ensure clean, singular customer records.
- Maintain a Healthy CRM: Increase trust in your database across teams.
Email ValidationEmail Validation
Send with Confidence. Reach Real People.
Make every email count with Versium’s Email Validation API. Clean your contact lists and ensure your emails land in real inboxes — not bounce into the void. Our validation process analyzes each email address to improve deliverability and protect your sender reputation.
With Versium’s Email Validation API you can…
- Enable advanced classification. Categorize emails as Valid, Invalid, Unknown, Catch-All, Spamtrap, Abuse, or Do-Not-Mail
- Access detailed sub-status reporting. Get specific reasons with 20+ error categories
- Validate both Consumer and Business email addresses.
SuppressionSuppression
Protect Your Brand and Optimize Campaign Performance
Prevent wasteful ad spend and ensure compliance by filtering out individuals who should not be included in your marketing efforts. Versium’s Suppression List API empowers your teams to manage exclusions with precision and ease.
Key capabilities of Versium’s Suppresion API include:
- Easily remove opted-out individuals, existing customers, or sensitive audience segments to meet privacy and regulatory requirements.
- Avoid targeting the wrong users by suppressing irrelevant or non-targetable profiles before activation.
- Upload, manage, and access suppression lists in real-time via API—no manual handling required.
- Export suppression lists in formats compatible with major advertising platforms, ensuring hassle-free data ingestion.
- Maintain multiple suppression lists based on audience type, campaign, or source to streamline operations and reduce overlap.
How to Get Started with Versium's APIs
By connecting to Versium’s APIs, you unlock a world of possibilities. Seamlessly integrate our powerful data solutions into your marketing campaigns, CRM databases, and web applications. Gain a competitive edge with the highest quality and most accurate business and consumer information available.
Sign Up & Get API Key
Get started with a developer account and create your first API key. This is your secure passport to Versium’s data universe.
Explore Available APIs
Use our interactive documentation to discover endpoints that support enrichment, identity resolution, lead scoring, and more.
Test & Integrate
Start with sandbox calls to test functionality. Our APIs are RESTful, easy to integrate into CRMs, marketing platforms, CMS tools, or your custom applications.
Power Your Data Workflows
Connect Versium’s real-time intelligence into your campaigns, platforms, and applications—ensuring every record, interaction, and insight is accurate, up-to-date, and actionable.
