Query records synchronously
Company, contact, email, mobile, UCC, BBB, and review endpoints with documented pagination and rate limits.
LeadX for Data & API Teams
A B2B data API for the systems you already run.
Bring company, contact, UCC filing, equipment ownership, review, and reputation data into your warehouse, product, or internal tooling through a REST API, bulk delivery, or an authenticated MCP server for AI agents.
Buying data is easy. Keeping it usable inside your stack is the work.
LeadX exposes the same resolved records through three delivery paths — synchronous REST calls for lookups, bulk files for backfills and refreshes, and an authenticated MCP endpoint so AI agents can query under your account's own permissions and credit limits. Entity resolution happens upstream, so you are not deduplicating vendors in your own pipeline.
What You Get
Built around the decision you are actually making.
Backfill and refresh at volume
Enterprise bulk delivery for warehouse loads, internal scoring models, and data products.
Native MCP access
An authenticated MCP server lets AI assistants call LeadX endpoints under your account's permissions.
One entity, not five vendors
Records arrive resolved to a single company, so joins do not become a deduplication project.
Where It Fits
Workflows this data supports.
Product integration
Embed company and contact lookups inside a SaaS product or internal application.
Warehouse loading
Land bulk company, contact, and filing data for analytics and scoring.
Pipeline enrichment
Append fields to records already flowing through an ETL or reverse-ETL job.
Agent tooling
Give an internal assistant governed access to company and filing data over MCP.
Common Questions
Questions from data & API teams.
What can the LeadX API do?
It exposes company search, contact search, email and mobile lookup, UCC filing search, Better Business Bureau data, Google reviews, and a combined all-attributes endpoint. The base URL is https://api.leadx.com/v1. See API and bulk data.
Do you support bulk delivery as well as an API?
Yes. Enterprise bulk delivery provides large targeted datasets as files, which is usually the right path for warehouse backfills, internal scoring models, and data products, with the REST API used for synchronous lookups.
Can AI agents query LeadX directly?
Yes. LeadX publishes an authenticated MCP server, an A2A agent card, an agent capability catalog, and Web Bot Auth signatures. Agents call endpoints under your account's own permissions, rate limits, and credit charges rather than through a shared key.
How is authentication handled?
API access uses credentials issued to your account. Authentication, pagination, rate limiting, and error handling are documented in the public getting-started guides.
Are records deduplicated before delivery?
Records are resolved to a single company entity upstream, so the same business does not arrive as several rows under name and address variants. That keeps joins in your own pipeline from turning into an entity-resolution project.
What are the pagination and rate-limit rules?
Search endpoints are paginated and rate limited, with both documented publicly in the pagination and rate-limiting guides, alongside retry and error-handling guidance for production integrations.