On July 28, MCP’s maintainers plan to finalize the protocol’s 2026-07-28 revision, bringing many changes – including some that aren’t backward compatible – that reflect some "hard lessons" the core MCP team learned over the past two years, said Anthropic technical staff member David Soria Parra in a livestream Tuesday.
The 2026-07-28 revision will come with the "most substantial changes we have made to the specification, probably since adding authorization," Parra said. "A lot of things that made MCP are gone."
Parra claims the new MCP will be easier to deploy and use. If users have been updating their SDKs, they shouldn’t have much problem upgrading.
