Search and enrich business records
Query companies by name, URL, phone, address, industry, geography, and other matching criteria.
LeadX API & Bulk Data
Business intelligence delivered inside your own systems.
Use REST APIs and enterprise bulk delivery to bring LeadX company, contact, UCC, review, reputation, email, and mobile intelligence into products and internal workflows.
POST https://api.leadx.com/v1/companies { "company_name": "Construction", "state": ["TX", "CA"], "has_contacts": true } 200 OK { "total_records": 93201, "records": [ ... ] }
One integration boundary for multiple business-data workflows.
LeadX APIs support focused lookups and broader search across company, contact, UCC, email, mobile, BBB, and review data. For workloads better suited to files, enterprise bulk delivery provides targeted datasets and recurring refreshes in an agreed format. Learn how to make your first API call, connect an AI assistant, or explore the MCP tools.
Developer and Data Products
Choose the delivery path that fits the workload.
Retrieve people connected to companies
Find contact records and professional context for decision-maker discovery and enrichment.
Search debtor and secured-party filings
Integrate UCC filings, collateral, status, parties, and related company context.
Find and validate email and mobile data
Run focused contact-channel enrichment from names, company domains, and professional profiles.
Add reviews and BBB intelligence
Retrieve ratings, accreditation, complaints, reviews, and other business-reputation signals.
Receive high-volume targeted datasets
Define coverage, fields, format, volume, and refresh cadence for enterprise data delivery.
Integration Paths
Support transactional lookups and data operations at scale.
Internal Applications
Embed company and filing intelligence in the research tools employees already use.
CRM Enrichment
Fill missing account and contact fields and support repeatable go-to-market workflows.
Data Warehouses
Deliver targeted records for analytics, scoring, portfolio monitoring, and modeling.
SaaS Products
Use LeadX data as an input to customer-facing research and business-data features.
Common Questions
API and bulk data questions, answered.
What can the LeadX API do?
The LeadX REST API exposes the same intelligence available in the platform: company search, contact search, email and mobile lookup, UCC filing search, Better Business Bureau signals, Google reviews, and a combined all-attributes endpoint — so LeadX data can run inside your own products and internal workflows.
What is the API base URL?
The LeadX API is served from https://api.leadx.com/v1. Full schemas, parameters, and response shapes are published as an OpenAPI 3.1 specification in the API documentation.
How does API authentication work?
API access requires valid LeadX credentials issued to your account. Authentication, pagination, rate limiting, and error handling are each documented in the getting-started guides.
Can I get UCC filing data through the API?
Yes. The UCC endpoint supports debtor and secured-party search with collateral, status, and filing detail, and results can be joined to company and contact records in the same workflow. See UCC filing data.
Do you support bulk data delivery?
Yes. Enterprise bulk delivery provides large targeted datasets as files for teams that load company, contact, and filing data into a warehouse, internal scoring model, or data product rather than querying record by record.
Can AI agents use LeadX data directly?
Yes. LeadX publishes an authenticated MCP server, an A2A agent card, an agent capability catalog, and Web Bot Auth signatures, so AI agents can discover and call LeadX endpoints under your account’s own permissions and credit limits.