{"version":"2.1.281","anchor":"deferred-mcp-servers-can-be-started-later-in-a-session","canonical_anchor":"deferred-mcp-servers-can-be-started-later-in-a-session","heading":"Deferred MCP servers can be started later in a session","tier":null,"area":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281\/e\/deferred-mcp-servers-can-be-started-later-in-a-session","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281","markdown":"### Deferred MCP servers can be started later in a session\n\nMCP servers whose start was put off can now be started later in a session\n\n**Unclear.** The finding does not say what triggers the step or what the \"claim\" label means.\n\n**What**\n\nMCP servers are outside programs that give Claude extra tools. Some of them can have their start deferred, meaning put off. When any deferred servers are configured, session setup now receives a `startDeferredMcpServers` step. It connects those servers under the label \"claim\" and returns their names.\n\n**Why**\n\nA server that was not connected when the session began can be brought in partway through instead of only at startup."}