LeadX API | LeadX API docs

The LeadX API makes it simple to look up companies, pull contacts, validate information, and search UCC lien records. Use it to find and verify business data, enhance customer outreach, and enrich your CRM with accurate B2B intelligence.

Every request follows a consistent URL structure:

https://api.leadx.com/v1/{endpoint}

Use cases

Credit risk screening

Combine UCC lien records, Better Business Bureau ratings, and Dun & Bradstreet data to evaluate business creditworthiness.

Sales lead enrichment

Enrich prospect lists with verified company details, mobile numbers, and emails before outreach.

CRM data enrichment

Submit idempotent jobs and merge results into source records by external ID.

Contact discovery

Find decision makers at target companies, complete with titles, seniority, and LinkedIn profiles.

UCC research

Research debtor filings, secured-party portfolios, collateral, lifecycle events, and market activity.

Available APIs

Company API

Look up enriched company data by name, URL, phone number, or address — including BBB, Dun & Bradstreet, and Google Reviews details.

Contact API

Fetch contact records matching your search criteria, individually or in bulk.

Email API

Find and validate email addresses by name and domain, or by LinkedIn URL.

Mobile Number API

Look up mobile phone numbers by LinkedIn URL.

UCC API

Search UCC lien filings by debtor or secured party, with filtering and pagination.

Choosing the right API

API	Input	Output	Use case
Company API	Company name, URL, phone, or address	Enriched company profile with firmographics and classifications	Company research and CRM enrichment
Contact API	Contact or company search criteria	Contact records with titles, seniority, and LinkedIn profiles	Discovering decision makers
Email API	Name and domain, or LinkedIn URL	Verified email address and validation metadata	Outreach and list hygiene
Mobile Number API	LinkedIn URL	Mobile phone number	Direct outreach
UCC API	Debtor, secured-party, filing, collateral, asset, geography, and lifecycle filters	UCC financing statements and filing metadata	Diligence, prospecting, monitoring, and portfolio research

Getting started

Get your API key

Every request requires an API key sent in the X-API-KEY header. See Authentication for details.

Make your first call

Follow the quickstart guide to fetch company details with a single cURL command.

Explore the endpoints

Every endpoint page includes an interactive playground — run API calls directly from your browser and view live JSON responses.