Claude docs changes for January 26th, 2026 [diff]

Executive Summary

• Asana MCP server connection updated from SSE to streamable-http transport
• New Slack MCP server added for sending messages, creating canvases, and fetching Slack data

Claude Code changes

Changed documents

mcp [Source]

• Asana MCP server connection command updated to use streamable-http transport instead of sse transport, with new endpoint /v2/mcp. [line 171] [Source]
• New Slack MCP server added for sending messages, creating canvases, and fetching Slack data at https://mcp.slack.com/mcp. [lines 393-397] [Source]

API changes

Changed documents

remote-mcp-servers [Source]

• Box MCP server documentation link updated from box.dev to developer.box.com. [line 219] [Source]
• New Slack MCP server added for sending messages, creating canvases, and fetching Slack data at https://mcp.slack.com/mcp. [lines 549-555] [Source]

extended-thinking [Source]

• Contact email link updated to direct mailto:sales@anthropic.com instead of email protection link for accessing full thinking output. [line 98] [Source]

files [Source]

• Contact link for higher file API rate limits updated (remains an email protection link but with different encoding). [line 284] [Source]