Notion outage: Notion MCP query_data_source tool is temporarily unavailable in Claude clients

1. resolvedOct 22, 2026, 04:42 UTC

   This issue has been resolved. The Notion MCP query_data_source tool is available again in Claude clients.

2. investigatingOct 22, 2026, 03:33 UTC

   The Notion MCP query_data_source tool is temporarily unavailable in Claude clients.

3. investigatingOct 22, 2026, 03:23 UTC

   The Notion MCP query_data_source tool is temporarily unavailable in Claude clients.

What APIStatus.watch saw

• Oct 22, 2026, 03:25 UTCoperational → partial outage
• Oct 22, 2026, 04:45 UTCpartial outage → operational

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Overlapping incidents aren't necessarily related.

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How often does Notion have incidents?

Notion reported 18 incidents in the last 90 days, 5 of them major or critical. A typical incident lasted 3h. See Notion's uptime and incident history