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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.299 ·

MCP folder registration is capped, and some servers are skipped when set from the SDK

Registering MCP folders past a limit is refused, mcp_set_servers skips filtered servers with errors, and /mcp reports blocked servers

You'll notice Improvements
JSON All of v2.1.299
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.299,
ImprovementsSection of the release

Unclear Which servers mcp_set_servers now filters out is not stated.

What

MCP servers are add-on servers that give Claude Code extra tools. Three things changed in how Claude Code handles them:

  • Registering a folder is refused past a limit, with the reason too_many. Before, a refusal only said folder not registered.
  • mcp_set_servers, used by programs that drive Claude Code through the SDK, now passes on only servers that are not blocked by a filter, and reports an error for each server it skipped.
  • The /mcp status check now reports servers that are waiting for project approval or are blocked by policy, without trying to connect to them.
Why

MCP handling is stricter. Programs using the SDK may get per-server errors where servers used to be accepted silently, and /mcp shows why a server is not connected.

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 doubtWhich servers `mcp_set_servers` now filters out is not stated.

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