skinny.

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Sandbox escape: 2,000 MCP plugins inside Claude

On 27 September 2026 Anthropic opened the Claude Marketplace with more than 2,000 connectors and plugins publishable through MCP and Agent Skills. Every installed connector is third-party code operating inside the agent's context with the user's permissions: the protocol becomes a distribution channel, and the agentic supply chain enters the corporate perimeter. An analysis of the mechanism, the points the announcement leaves open and the procurement decisions to take now.

The skinny

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