LinkupAPI

LinkupAPI is a unified API platform designed to connect AI agents and automation workflows to B2B communication channels such as LinkedIn, WhatsApp, and email. It provides a single integration point for sending messages, verifying and enriching email data, crawling web content, and accessing company and person information. The platform includes multiple specialized APIs, including Engagement API, Mail API, Web Crawler API, Person API, Signal API, and Company API. The service is built for developers and businesses that need to automate sales, recruitment, CRM enrichment, and lead generation processes. It offers over 50 endpoints, an average response time under 3 seconds, and a 99.9% uptime SLA. LinkupAPI also supports no-code platforms like Make and n8n, making it accessible to non-technical users. The API uses REST endpoints with JSON payloads and requires an API key for authentication. LinkupAPI positions itself as a comprehensive solution for B2B data automation, enabling use cases such as LinkedIn automation, candidate sourcing, buying signal detection, and AI-powered sales agents. It also provides security and compliance features, though specific details are not fully disclosed on the homepage. The platform is cloud-hosted and does not appear to offer a self-hosted version.

Category: AI API
Pricing: Unknown

Problem solved

LinkupAPI solves the problem of integrating multiple B2B communication channels and data sources into a single API. It eliminates the need for separate integrations for LinkedIn, WhatsApp, email verification, and web crawling, allowing developers to build AI agents and automation workflows faster and with less maintenance.

Use cases

Automating LinkedIn outreach and messaging for sales prospecting
Sending WhatsApp messages to leads and customers
Verifying and enriching professional email addresses
Crawling company websites for real-time business signals
Building AI sales agents that interact across B2B channels
Enriching CRM records with company and person data
Sourcing candidates for recruitment and ATS workflows
Detecting buying signals from web and social data

Audience

Developers
ML Engineers
Data Scientists
Startups
Enterprise

Pros

Unified API for multiple B2B channels
Fast average response time under 3 seconds
High uptime of 99.9%
Includes web crawling, email verification, and engagement endpoints
Supports no-code platforms like Make and n8n

Cons

Pricing is not publicly disclosed
Requires login tokens for messaging endpoints
No self-hosted option available
LinkedIn automation may be subject to platform restrictions

Official website: https://linkupapi.com/

Canonical LambdaBase page: https://www.lambdabase.com/tools/linkupapi

← Directory

LinkupAPI

Unknown

• Updated Aug 31, 2026, 03:10 PM

LinkupAPI is a unified API platform designed to connect AI agents and automation workflows to B2B communication channels such as LinkedIn, WhatsApp, and email.

Use Cases ▼

Automating LinkedIn outreach and messaging for sales prospecting

Sending WhatsApp messages to leads and customers

Verifying and enriching professional email addresses

Crawling company websites for real-time business signals

Building AI sales agents that interact across B2B channels

Enriching CRM records with company and person data

Sourcing candidates for recruitment and ATS workflows

Detecting buying signals from web and social data

What Problem It Solves ▼

Key Features ▼

✓

Unified API for multiple B2B channels

✓

Fast average response time under 3 seconds

✓

High uptime of 99.9%

✓

Includes web crawling, email verification, and engagement endpoints

✓

Supports no-code platforms like Make and n8n

Overview

Full Description ▼

The service is built for developers and businesses that need to automate sales, recruitment, CRM enrichment, and lead generation processes. It offers over 50 endpoints, an average response time under 3 seconds, and a 99.9% uptime SLA. LinkupAPI also supports no-code platforms like Make and n8n, making it accessible to non-technical users. The API uses REST endpoints with JSON payloads and requires an API key for authentication.

LinkupAPI positions itself as a comprehensive solution for B2B data automation, enabling use cases such as LinkedIn automation, candidate sourcing, buying signal detection, and AI-powered sales agents. It also provides security and compliance features, though specific details are not fully disclosed on the homepage. The platform is cloud-hosted and does not appear to offer a self-hosted version.