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Agents & LLMs: a Markdown version of this page is available by appending .md to the URL, and the full documentation index is at llms.txt.
BlitzAPI provides a programmable interface to access verified B2B data from a proprietary LinkedIn-based dataset covering 550M+ contacts worldwide. We enable Growth Engineers and RevOps teams to build automated lead pipelines at scale — no scrapers to maintain, no static databases to manage. BlitzAPI - B2B Data Enrichment

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⚡ Core Logic: Waterfall ICP

BlitzAPI’s most popular feature is the Waterfall ICP Search. It solves a common engineering challenge: mapping a target account to a specific decision-maker without manual filtering. Instead of retrieving a raw list of employees, you define a priority hierarchy. The API executes a cascading search until it matches your criteria.
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1. Define the Cascade

You configure a JSON rule: “First, look for the CEO in the US. If not found, look for the VP of Sales. If not found, look for a Sales Director.”
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2. Intelligent Routing

The API queries our proprietary dataset in priority order, stopping as soon as your criteria are matched.
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3. Structured Output

You receive the single most relevant decision-maker for that company, ready for enrichment.

Read the Waterfall Logic Docs

See how to construct hierarchical queries to maximize relevance.

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♾️ Flat-Rate Unlimited

BlitzAPI is a flat monthly subscription — no per-request fees, no overage surprises. Choose the plan that unlocks the APIs you need. Unlimited means unlimited for normal business use, subject to our Fair Use Policy.

See full plan comparison

Detailed feature matrix, use case guide, and free trial info.

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People Search Family

Three complementary endpoints — pick the one that matches your scope.

Find People

Search decision-makers across many companies in one call. Combine company filters (industry, size, HQ) with person filters (job title, level, location).

Employee Finder

Map all employees at one specific company with paginated, filtered results.

Waterfall ICP Search

Get the single best decision-maker at a known company via a priority cascade.

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What do you want to build?

Select the documentation path that matches your technical goal.

Quick Start

Get your API Key and run your first enrichment request via the SDK or cURL.

Official SDKs

Typed Python and TypeScript/JavaScript clients with retries, rate limiting, and auto-pagination.

Connect Your AI (MCP)

One-click setup for Claude, Cursor, and more. Your AI can call every endpoint, read the docs, and use built-in skills.

Build an ICP List

Generate a fresh prospecting list across hundreds of accounts in one Find People call.

Full Workflow

Chain Search, Enrichment, and Validation into a single automated pipeline.

API Reference

Interactive OpenAPI documentation to test endpoints and view schema definitions.

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Supported Integrations

BlitzAPI acts as the data engine behind your existing stack.
Building a custom integration? Our API is platform-agnostic. As long as your tool can make an HTTP POST request, it works with BlitzAPI.