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Sweep 01 Oct 2026 · 17:27Z Build v2.1.287 508 read Stable v2.1.285 Latest v2.1.287 Next v2.1.287 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.286 ·

SDK programs can switch off and back on the MCP servers they registered

Programs driving Claude Code through the SDK can now disable and re-enable MCP servers they registered themselves

Use it now New Features
JSON All of v2.1.286
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4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SDKArea: what it touches
New FeaturesKind: in v2.1.286,
What probably matters to youSection of the release
What

The SDK is the kit for driving Claude Code from your own program. Such a program can register its own MCP servers. An MCP server is an add-on that gives Claude extra tools through the Model Context Protocol.

When Claude Code runs without its interactive screen under such a program, the program can now disable an MCP server it registered and enable it again later.

Why

If you build on the SDK, you can turn your own MCP servers off and on during a run without removing them.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe exact name of the request an SDK program sends to do this is not known.

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