API to Find Contacts - SignalHire API

The SignalHire API allows developers to integrate the capabilities of SignalHire directly into their own applications. It provides access to a wealth of contact information — including emails, phone numbers, and social media profiles — from a global database of professionals. The API enables businesses to find and verify contact details, improve customer outreach, and enrich data for CRM systems. SignalHire API is designed to be simple, scalable, and secure. It offers endpoints to retrieve detailed information about individuals based on known identifiers, as well as powerful search capabilities to discover new prospects. The flexibility of the API allows for easy integration into existing applications and workflows, giving access to accurate data when needed.

Use Cases

Enrich CRM Data

Automatically enrich CRM contacts with verified emails, phone numbers, and social profiles using the Person API.

Lead Generation

Discover new prospects by searching the SignalHire database with filters like job title, location, company, and industry.

Talent Acquisition

Find and contact candidates matching specific skills, experience level, and location criteria.

Market Research

Explore professional landscape data across industries, companies, and geographies.

Available APIs

Person API

Retrieve full, detailed information about a specific individual using a LinkedIn URL, email, phone, or profile ID. May return contact details depending on the request mode.

Search API

Search for individuals using filters like job title, location, company, or industry. Returns a list of matching profiles for lead generation and talent sourcing.

Company API

Look up companies, retrieve full company profiles, and fetch employee lists. Available on request — contact support to enable.

Key Differences Between APIs

	Person API	Search API	Company API
Input	LinkedIn URL, email, phone, or UID	Search filters (title, location, etc.)	Company ID or slug
Output	One full profile, may include contacts	Multiple brief profiles, no contacts	Company data or employee profiles
Use case	Enrich a known person’s data	Discover new candidates or leads	Company research and employee sourcing
Delivery	Async (callback) or sync (`withoutWaterfall`)	Sync — first batch in response, pagination via `scrollId`	Sync for lookup and info, async callback for profiles
Access	Standard	Standard	On request via support

Getting Started

Get an API key

Make the first request

Start with the Person API to retrieve data for a known LinkedIn profile or email address.

Explore search

Use the Search API to find new prospects using filters like job title, location, or company.

Authentication

​Use Cases