Build plugins for Claude

Anthropic opened a developer portal for plugins for Claude. Plugins package MCP connectors, Agent Skills, or both. Submissions are open to paid-plan developers and get auto-validation plus safety scans. Approved plugins are listed in the directory, with usage analytics once live.

Why it mattered Plugins become the main way to extend Claude. A real submission pipeline with validation gives the Marketplace its supply.

Plugins package MCP connectors, Agent Skills, or both. Developers submit them through a new directory submission portal open to paid plans. The portal auto-validates and safety-scans each submission, showing review status, safety-scan results, and recommended changes. Once live, usage analytics show installs by product surface and version.