Provider
Starburst GalaxyIncident detail
Galaxy MCP server — tool calls failing
Resolved incidentMajor1 affected service
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Timeline
Incident updates
Every update on the official status source, oldest to newest, exactly as it appeared there.
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.
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.
Resolved
This incident is now resolved. All impacted MCP calls should now be operating as expected.
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