Go WhatsApp Web Multidevice is a REST API server for WhatsApp built in Go that enables programmatic interaction with WhatsApp accounts through multi-device support, webhooks, and a web UI.
The tool solves the problem of integrating WhatsApp messaging into applications and automation workflows by exposing WhatsApp Web functionality as HTTP endpoints. It works by connecting to WhatsApp Web using a multi-device approach, allowing a single server instance to manage multiple WhatsApp accounts simultaneously. Each device connection is scoped through either an HTTP header or query parameter, and the tool provides webhooks to notify external systems of incoming messages and events. It also supports integration with n8n through a community node and with Chatwoot for customer communication management.
Developers should choose this tool if they need to automate WhatsApp messaging at scale or integrate WhatsApp into existing applications without managing multiple separate instances. It suits projects requiring multi-account management on a single server, webhook-driven event handling, or integration with automation platforms. The tool is built with Go specifically for memory efficiency, making it suitable for resource-constrained environments. It offers both REST API and WebSocket modes, with a web UI for manual account management. The project provides Docker images for ARM and AMD64 architectures, simplifying deployment.
The project maintains active build and release automation through GitHub Actions. The tool has undergone significant architectural changes across versions, most notably introducing multi-device support that required API redesign with device scoping throughout the REST endpoints and WebSocket connections. The project includes integration points with external platforms like n8n and Chatwoot, indicating ongoing effort to expand ecosystem compatibility.
