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Audit v4 docs: fix missing version badges, fill whats-new gaps (#4668)

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* Fix missing/wrong 4.0.0 version badges

* Fill v4 badge and whats-new gaps found in docs audit
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Jeremiah Lowin 2026-07-27 15:03:18 -04:00 • committed by GitHub
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docs/deployment/http.mdx
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@ -151,6 +151,8 @@ Use `host_origin_protection="auto"` to protect localhost-bound direct servers wh
### Gateway Routing Headers
<VersionBadge version="4.0.0" />
A gateway, load balancer, or reverse proxy in front of your MCP server often needs to route a request before it reads the JSON-RPC body — the body may be an SSE stream, or the gateway may simply want to avoid parsing it. On a connection that negotiates the modern `2026-07-28` protocol, Streamable HTTP clients built on the MCP Python SDK (including FastMCP's own client) attach routing information to each request as HTTP headers so an intermediary can dispatch on headers alone:
- `Mcp-Method` carries the JSON-RPC method (for example `tools/call`) on every request.