How AgentCore Gateway supports the MCP 2026-07-28 spec

The Model Context Protocol released its 2026-07-28 spec, its largest revision yet, and AWS details how to enable it on AgentCore Gateway via a single UpdateGateway call.

By AIWI EditorialReviewed by Chayanika DivekarAI-assisted summary · human-reviewed1 min readPublished Jul 28, 2026

Single source1 source

Reality Check

Availability: Shipping now
Hype-o-meter: Mostly substance
Who it's for: Developers · Enterprises
Do this now: Review the MCP 2026-07-28 changes and use UpdateGateway to enable the new version on AgentCore Gateway.
Claims check: Claims are specific and tied to a documented spec revision and a concrete configuration step.
Corroboration: Single source · 1 source

Key Takeaways

MCP 2026-07-28 is the largest revision since the protocol launched
MCP is now stateless with a governed extensions system
The new spec includes hardened authorization
AgentCore Gateway can adopt it with one UpdateGateway call

The Model Context Protocol (MCP) has published its 2026-07-28 specification, described as the largest revision since the protocol’s launch. According to the AWS Machine Learning Blog, the updated spec makes MCP stateless, adds a governed extensions system, and strengthens authorization. The post explains what changed in the specification and how to enable the new version on Amazon Bedrock AgentCore Gateway using a single UpdateGateway call.

Why it matters

MCP is used to connect AI agents with external tools and context. Changes to statefulness, extensions governance, and authorization affect how integrations are built and secured, so a major revision has implications for developers relying on the protocol.

Who should care

Developers and teams using Amazon Bedrock AgentCore Gateway or building on MCP will want to review the changes and understand how to move to the new specification.

Was this helpful?

Sources & Further Reading

How AgentCore Gateway supports the MCP 2026-07-28 spec — AWS Machine Learning Blog · Jul 28, 2026

Frequently Asked Questions

How can AgentCore Gateway users adopt the new MCP spec?

The AWS post states the new version can be enabled with a single UpdateGateway call.

What are the main changes in MCP 2026-07-28?

MCP becomes stateless, gains a governed extensions system, and has hardened authorization.

Asynchronous patterns for calling Amazon Bedrock AgentCore agents in serverless pipelines — Aug 19, 2026
Monitor on-premises and multi-cloud AI agents with AgentCore Observability — Aug 13, 2026
How we built an MCP bridge to give our AgentCore-hosted AI agent access to local MCP tools — Aug 5, 2026
Run production AI agents in n8n with Amazon Bedrock AgentCore harness — Aug 5, 2026

#agents #apis #cloud #developer-tools