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<@U4H0M349G> are there any plans to support <https://cheatsheetseries.owasp.org/cheatsheets/MCP_Security_Cheat_Sheet.html#7-message-level-integrity-and-replay-protection|MCP Message signing>?

right now no - eventually probably yes - it doesn't seem to difficult and looks like it can be done with an McpFilter.

However, it's going to have to wait until after the new version of the MCP SDK which covers the new spec and is basically going to be a complete internal rewrite due to the rather large spec changes. On the surface the main APIs look similar, but the differences were enough that we just went for a clean break.

More on that soon(ish), but for v6 we'll be publishing that new SDK under a new set of module coordinates with a shim to allow old and new SDKs to run concurrently. In v7, the old modules will be swapped out for the new ones and the old modules move to new coordinates (http4k-ai-mcp-sdk-legacy or similar)