Download the Complete Guide to MCP '26

A July 28 revision to the Model Context Protocol (MCP) introduces its largest set of changes since the protocol launched in November 2024, including breaking updates intended to support enterprise-scale deployments rather than primarily local servers. The accompanying guide explains the shift toward stateless operation, improved refresh-token security, and official extensions that increase modularity while creating potential fragmentation challenges. It also provides migration checklists, guidance for handling immediate traffic changes, and technical instructions for clients, harnesses, servers, and gateways adapting to stateless MCP, including opportunities for load balancing and serverless scaling. Arcade is presented as a runtime that supports both protocol versions, allowing organizations to migrate servers and clients gradually while maintaining authorization, security, and governance.

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