Published MCP Guide Found Outdated After Spec Deprecated HTTP/SSE Transport

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An automated freshness check flagged a published MCP developer guide for requiring updates due to three specification changes. The most critical issue is that the guide still lists HTTP/SSE as a current MCP transport, despite it being officially deprecated on March 26, 2025. Streamable HTTP has been the standard remote transport since the July 28, 2026 spec update. The guide also recommends a max-iterations range of 3–5, which now conflicts with n8n's current guidance, though the updated figure was not disclosed. The product was marked as update-needed rather than obsolete, triggering a targeted rewrite of affected sections and file replacements on Etsy and Gumroad.

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