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CompaniesStarburstIncidents

Starburst: Galaxy MCP server — tool calls failing

MajorStatus: resolvedStarted Resolved (0 min)3 updatesstatus.galaxy.starburst.io (opens in new tab)

Affected components: Starburst Galaxy UI

Timeline of updates

  1. identified

    Starburst Galaxy's MCP server is returning an error for every tool call from MCP clients using the newest protocol revision, 2026-07-28. Sign-in, discovery and tool listing are unaffected, and clients on revision 2025-11-25 are not affected.
    Workaround: pin your MCP client to protocol revision 2025-11-25, which has been confirmed to restore tool calls.
    We are investigating and will post an update as soon as we have one.

  2. identified

    We've identified an issue causing MCP tool calls to fail with a protocol error for Galaxy MCP users (both mcp-starburst and mcp-starburst-public, all auth methods). A fix is in progress.
    Workaround (Claude Code users): setting "MCP_PROTOCOL_NEGOTIATION": "legacy" in ~/.claude/settings.json mitigates the issue. Other MCP clients (Gemini CLI, Cursor, Continue.dev, Cline) aren't currently affected, since they default to an older protocol revision.

  3. resolved

    This incident is now resolved. All impacted MCP calls should now be operating as expected.

Changes Rewindex caught on this incident

Archive proof

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This incident predates live tracking (October 17, 2026). It came from the vendor’s own published history, which is not covered by checkpoints.

Impact, status and times are the vendor’s own, as last archived. View on status.galaxy.starburst.io (opens in new tab).

Cite this

Status incident (vendor impact label: major) posted by Starburst, started 2026-09-09 20:42 UTC, resolved after 0 min, 3 update(s).

Title
Galaxy MCP server — tool calls failing
Vendor
Starburst
Date
URL
https://rewindex.com/company/starburst/incidents/njw44gcf8474

Starburst profileRecent Starburst incidentsAll outages on September 9, 2026Starburst in September 2026MarkdownJSON