Notion changed its API changelog

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+August 27, 2026
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+FETCH SAVED DATABASE VIEWS IN NOTION MCP
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+Notion MCP’s notion-fetch now accepts view:// URLs to read saved view settings. Tool response text now names fetch instead of view, without changing page content.
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+CUSTOM AGENT SESSION TOOLS IN NOTION MCP
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+Notion MCP now supports finding and working with Custom Agent sessions. The new tools can query or search sessions, start a session, send a follow-up message, check or wait for its status, stop a run, and list or read session events. See Supported tools for the full tool list and examples.
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 August 25, 2026
 
 ATOMIC BATCHED CONTENT UPDATES IN NOTION MCP
 
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 Formula expressions submitted through Update a data source now store prop("Property Name") references exactly as written. Previously, the API accepted some expressions but silently rewrote them — most visibly, a reference to a unique ID property dropped the ID’s prefix from computed values, and a prop() reference inside an array literal emptied the array. Expressions the API can’t store now return a validation_error instead. Formulas saved before this fix keep their old stored expression until you resubmit the update.Formula properties created through the API also now keep their result type, so number formatting options stay available in Notion and other formulas can reference them with prop().
 
 READABLE FORMULA EXPRESSIONS IN DATA SOURCE SCHEMAS
 
-Retrieve a data source is beginning to return formula expressions using the same prop("Property Name") syntax you write. This change is rolling out gradually over the coming days; expressions that can’t be rendered faithfully in this syntax continue to use the internal property reference syntax.
+Retrieve a data source now returns formula expressions using the same prop("Property Name") syntax you write. Expressions that can’t be rendered faithfully in this syntax continue to use the internal property reference syntax.
 
 ADMIN API REFERENCE FOR AGENTS
 
 The Admin API reference now covers the endpoints for managing agents in a workspace: credit usage and limits, permissions, status, creation policy, and workflow metadata.
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  * The example for the Formula database property was updated to align with the new Formula 2.0 launch.
  * New sample code was added to the Notion SDK for JavaScript’s examples directory. This new example demonstrates how to use the Public API with basic and intermediate levels of difficulty.
 
 Looking for older updates?Changelog entries from before September 2023 are now kept in a separate page: Historical changelog.
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