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

- Impact (vendor’s label): major
- Status: resolved · edited after publishing
- Started: 2026-10-22 03:23 UTC · Resolved: 2026-10-22 04:42 UTC · Duration: 1.3 h
- Updates: 3 · Affected components: Notion MCP
- [Vendor status page: https://www.notion-status.com/incidents/01M5GT4J4EF9Z9R6M4KD9AY21Q](https://www.notion-status.com/incidents/01M5GT4J4EF9Z9R6M4KD9AY21Q)
- [Company: Notion](https://rewindex.com/company/notion.md)

## Timeline of updates

- **investigating** 2026-10-22 03:23 UTC: The Notion MCP query\_data\_source tool is temporarily unavailable in Claude clients.
- **investigating** 2026-10-22 03:33 UTC: The Notion MCP query\_data\_source tool is temporarily unavailable in Claude clients.
- **resolved** 2026-10-22 04:42 UTC: This issue has been resolved. The Notion MCP query\_data\_source tool is available again in Claude clients.

## Rewindex changes for this incident

- 2026-10-22 03:23 UTC: [Major incident: Notion MCP query\_data\_source tool is temporarily unavailable in Claude clients](https://rewindex.com/change/id5d63648ee3df9.md)
- 2026-10-22 04:43 UTC: [Incident updated: Notion MCP query\_data\_source tool is temporarily unavailable in Claude clients](https://rewindex.com/change/r263f07854f7c70.md)


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Canonical: https://rewindex.com/company/notion/incidents/01M5GT4J4EF9Z9R6M4KD9AY21Q · Markdown: https://rewindex.com/company/notion/incidents/01M5GT4J4EF9Z9R6M4KD9AY21Q.md · JSON: https://rewindex.com/api/v1/companies/notion/incidents/01M5GT4J4EF9Z9R6M4KD9AY21Q · Generated 2026-10-22T06:20:14.118Z