LinkupAPI

What LinkupAPI Does

LinkupAPI is a comprehensive API platform that connects AI agents, sales tools, and business applications to critical B2B channels including LinkedIn, WhatsApp, and real-time web data. With over 50 endpoints unified into a single platform, it eliminates the complexity of managing multiple data providers and integration points.

Who It's For

Built for developers, SaaS companies, AI agent builders, and no-code automation users who need to embed B2B engagement, data enrichment, and outreach capabilities directly into their products. Whether you're building sales platforms, recruitment ATS systems, CRM tools, or autonomous AI agents, LinkupAPI provides the infrastructure to scale B2B interactions.

Key Features & Capabilities

• Engagement API: Automate LinkedIn outreach at scale—send connection requests, messages (text and media), post comments, and launch multi-step engagement campaigns directly through your application
• Mail API: Verify email deliverability in real-time, discover professional contacts, reverse-lookup email addresses to full profiles, and enrich contact data at scale
• Web Crawler API: Crawl the web in real-time to extract fresh company information, funding signals, job postings, hiring intent, and recruiting insights on demand
• Person & Company APIs: Enrich profiles with complete career history, skills, education, and company details; search and filter prospects by job title, location, and industry
• Signal API: Detect buying intent signals in real-time—track job changes, company funding events, new hires, and engagement patterns to identify high-value opportunities
• WhatsApp Integration: Enable messaging capabilities across multiple B2B channels from a single unified interface

Typical Workflows & Use Cases

LinkupAPI powers prospecting automation for sales teams, candidate sourcing for recruitment platforms, lead enrichment for CRMs, and autonomous outreach for AI agents. Integration with Make, n8n, and Zapier enables no-code workflow automation. The platform processes data in real-time with <3s average response times and 99.9% uptime.

Security & Compliance

Built with enterprise-grade security: zero-storage architecture processes data on-the-fly without retention, ensuring GDPR and CCPA compliance. Authentication credentials never touch LinkupAPI servers—they remain client-side and are transmitted securely per request. Web scraping operates on publicly available data only, with no fake accounts or post-login data collection.

What Makes It Different

LinkupAPI consolidates 5+ specialized APIs (engagement, email, signals, company data, person data) into one developer-friendly platform with unified authentication, credit-based pricing, and consistent data formats. This eliminates integration complexity while providing the depth needed for sophisticated B2B workflows.