This release marks the stable release of the 2025-11-25 revision of the Model Context Protocol.

The specification is available on the official Model Context Protocol website.

For a detailed overview of changes, see 2025-11-25 changelog.

This release marks the release candidate (RC) 2025-11-25 revision of the Model Context Protocol.

The specification is available in draft form.

For a detailed overview of changes, see 2025-11-25 draft changelog.

This release marks the initial 2025-06-18 revision of the Model Context Protocol.

For a detailed overview of changes, see 2025-06-18 changelog.

To users and implementors: note that SDKs will adopt this version at their own pace, and the prior version of the spec may remain in use for an undetermined amount of time. The spec describes how clients and servers perform version negotiation with one another, permitting backwards and forwards compatibility.

This release marks the initial 2025-03-26 revision of the Model Context Protocol.

To users and implementors: note that SDKs will adopt this version at their own pace, and the prior version of the spec may remain in use for an undetermined amount of time. The spec describes how clients and servers perform version negotiation with one another, permitting backwards and forwards compatibility.

This release marks the final 2024-11-05 revision of the Model Context Protocol, including all backwards compatible changes made since the initial 2024-11-05 release.

This release marks the initial 2024-11-05 revision of the Model Context Protocol.

Final update to version 2024-10-07 of the spec.