ToolFunnel wraps old MCP servers so they still work after the July 28 spec change
WorldlyAd7946 · reddit · 2026-07-23
A Reddit post introduces ToolFunnel, a zero-dependency MCP gateway that wraps old servers so they can keep talking to new clients after the July 28 MCP spec change.
Key points:
- The upcoming spec revision removes the initialize handshake and sessions many servers rely on.
- toolfunnel wrap my-server bridges old servers and new clients in all four combinations, preserving tools, errors, prompts, subscriptions, progress, and cancels.
- It is MIT licensed, has an empty dependencies field, includes a policy gate, and can also host scripts as MCP servers without code.
- The author says the translation was tested at the wire level against real published servers.
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