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@joe-clickhouse joe-clickhouse released this 03 Sep 14:07
v0.6.0
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mcp-clickhouse v0.6.0

This release moves mcp-clickhouse to FastMCP 4 and adds MCP 2026-07-28 support while preserving legacy MCP clients and the standalone HTTP+SSE transport.

Before upgrading

  • Custom middleware that sets ClickHouse client overrides must await Context.set_state() and use serializable=False.
  • The standalone HTTP+SSE transport remains available but is deprecated. Use Streamable HTTP for new deployments.
  • Deployments that used FastMCP 2's default OAuth proxy client storage must have clients register and authorize again.
  • FastMCP no longer supports Supabase HS256 verification. Use RS256 or ES256.
  • Modern HTTP clients should send MCP-Protocol-Version on every POST request.

Highlights

  • Supports MCP 2026-07-28 with server/discover, sessionless requests, response caching hints, and request metadata validation.
  • Keeps initialize compatibility for MCP 2024-11-05 through 2025-11-25.
  • Preserves static token and OAuth authentication, Host and Origin checks, trusted proxy handling, and the minimal unauthenticated /health endpoint.
  • Fixes pagination token races and preserves cursors across failures and cancellation.
  • Runs metadata work in a separate bounded executor so schema discovery does not delay queries.
  • Reports the mcp-clickhouse package version in protocol responses.

Full Changelog: v0.5.0...v0.6.0

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