⚡ 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.1
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 live data layers in real-time, respecting your priority order.
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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.
♾️ The Unlimited Model
For high-volume operations, we offer Unlimited Plans (Pro, Ultra, Mega). These plans remove per-request costs for our four core infrastructure endpoints. This allows you to scale enrichment workflows without calculating marginal costs per lead.Waterfall ICP Search
Target decision-makers by job title and location.
Find Work Email
Enrich profiles with verified professional emails (SMTP validated).
Find Phone Number
Access direct mobile or line numbers (available on Mega plan).
LinkedIn to Domain
Resolve Company LinkedIn URLs to verified website domains.
What do you want to build?
Select the documentation path that matches your technical goal.Quick Start
Get your API Key and execute your first enrichment request via cURL.
Full Workflow
Learn how to chain Search, Enrichment, and Validation into a single automated pipeline.
Pricing & Limits
Technical details on rate limits (RPS), concurrency, and fair use policies.
API Reference
Interactive OpenAPI documentation to test endpoints and view schema definitions.
Technical Differentiators
Why do engineering teams choose BlitzAPI over static databases?Live Signal
We do not serve cached data older than 30 days. We query the network in real-time (1-3s latency) to ensure employment status is current.
Strict Validation
We do not guess emails based on patterns (e.g.,
first.last). We only return data that passes a live SMTP handshake or identity match.Developer Native
Standard REST principles, predictable JSON responses, and native integrations with low-code orchestrators.
Supported Integrations
BlitzAPI acts as the data engine behind your existing stack.| Category | Compatible Tools |
|---|---|
| Orchestrators | n8n, Make (Integromat), Zapier |
| Data Operations | Clay, Airtable, Google Sheets |
| CRM & Sales | HubSpot, Salesforce, Pipedrive |
| Outreach | Smartlead, Instantly, Lemlist |
Building a custom integration? Our API is platform-agnostic. As long as your tool can make an HTTP POST request, it works with BlitzAPI.