LinkupAPI

LinkupAPI is a platform that exposes outreach capabilities through a single REST API and an MCP server, enabling AI agents and software to search for prospects, initiate messages, and receive replies from multiple channels.

The MCP server lets Claude, ChatGPT, Gemini or other MCP clients call LinkupAPI tools to search profiles, send messages, and read replies through connected accounts. It emphasizes compatibility with various AI assistants and a no-code integration approach via a single server URL and client authorization.

The product supports multi-channel outreach, with a common API key and request format for LinkedIn, email, WhatsApp and iMessage. It highlights real-time replies, webhooks for inbound messages, and dedicated infrastructure per account for safety and reliability.

The platform promotes a developer-focused experience, offering examples, documentation, and guides to connect accounts, launch multi-step sequences, and track results within a product or AI agent workflow.

Use cases

• Embed outreach in a product to reach prospects across channels and get replies in real time.
• Automate LinkedIn engagement from your product, including likes and replies.
• Automate emails from connected Gmail or Outlook mailboxes with verification.