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The current MCP protocol revision is 2026-07-28, and HTTP+SSE should no longer be described as the current remote transport. The official changelog marks HTTP+SSE as deprecated and points implementers to Streamable HTTP. A post credited to Robert says a published guide, #133, still presents HTTP+SSE as current. That guide’s text was not examined for this article, so its specific claims are reported as the post’s claims, not as verified facts. The post’s max-iterations point also cannot be settled from the evidence available.
Which MCP version is current
The official MCP versioning documentation identifies 2026-07-28 as the current protocol version. Revision identifiers use the YYYY-MM-DD format and indicate the date of backwards-incompatible changes. Backwards-compatible updates do not by themselves change the identifier. A guide that names an older revision, or names none, gives readers no reliable way to judge whether its protocol details still match the specification. The versioning page is the place to check the identifier: MCP versioning documentation.
Why HTTP+SSE can no longer be presented as current
The 2026-07-28 changelog marks HTTP+SSE as deprecated, with migration toward Streamable HTTP. Deprecation is not the same as removal. Under MCP’s versioning policy, a deprecated feature stays in the specification during its deprecation window and is scheduled for eventual removal. A guide can therefore be technically accurate about what HTTP+SSE does while still being wrong about its status. Presenting a deprecated transport as the default steers new implementations toward the option the specification is moving away from.
Transport wording is not the whole update
The 2026-07-28 revision changes more than the transport label. The official release announcement describes it as bringing “a stateless protocol core, Multi Round-Trip Requests, header-based routing, cacheable list results, authorization hardening, a formal extensions framework, and updated Tier 1 SDKs.” Three changes in the changelog matter most for older guidance.
#1 Best Overall
Protocol-level sessions are removed
The revision removes protocol-level sessions and the Mcp-Session-Id header from Streamable HTTP. Code samples that create a session, store state against that identifier, or send that header are describing behavior the revision no longer defines. Updating a sentence that names the transport does not fix those samples.
The initialize exchange is removed
The initialize and notifications/initialized exchange is removed. Under the revision, protocol version and client capabilities are carried in _meta on every request. A guide that walks through a startup handshake before any tool call is describing the older flow.
Rank #2
Several features are marked deprecated
The changelog marks Roots, Sampling, Logging, HTTP+SSE, and selected includeContext values as deprecated. Guidance that teaches these as standard practice should be reviewed, even where the feature still appears in the specification during its deprecation window.
What the article says about guide #133
The post, credited to Robert, states that it was originally published at neuragrowth.co; the copy linked here is hosted on dev.to. It says a freshness check flagged guide #133 for three changes across sections 2 and 9, and it treats two as material. The table separates what the official sources support from what rests only on the post.
| Claim | Where it comes from | Status |
|---|---|---|
| The guide presents HTTP+SSE as the current transport | The post | The changelog supports the transport status: HTTP+SSE is deprecated and Streamable HTTP is the direction. The guide’s wording was not examined. |
| The problems sit in sections 2 and 9 of the guide | The post only | Not independently verified. |
| The guide recommends a max-iterations range of 3–5 that conflicts with n8n guidance | The post only | The guide’s figure is what the post reports. The current n8n recommendation is not established here (see below). |
| The guide is sold through Etsy and Gumroad and carries an update-needed status that triggers targeted rewriting and an “Updated” note | The post only | Not independently verified, including the listings’ current contents. |
The post’s underlying argument is that a transport replacement changes the meaning of old text, not just its freshness. In the post’s words, “When the MCP spec replaces a transport, any guide, codebase or README that names the old one as current becomes actively misleading rather than just outdated.” The post was published September 24, 2026. That reasoning holds up against the changelog, even though the guide-specific allegations remain the post’s own.
The n8n max-iterations claim
The post says the guide recommends a max-iterations range of 3–5 and that this conflicts with n8n’s current guidance. It does not state what n8n now recommends, or when that guidance changed. Neither the number nor the date can be confirmed from the available evidence. Treat 3–5 as the guide’s recommendation, not as a verified figure, and check n8n’s own dated documentation before changing a value in either direction.
Rank #4
Maintenance checklist
Use these checks when reviewing any MCP guide or codebase that predates the 2026-07-28 revision:
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →- Confirm the guide names
2026-07-28as the protocol revision it targets, or states clearly which revision it covers. - Check that HTTP+SSE is labelled deprecated wherever it appears, and that Streamable HTTP is the transport presented for new implementations.
- Search examples for
Mcp-Session-Idand any code that depends on protocol-level sessions, and remove or rewrite them. - Replace any
initialize/notifications/initializedstartup flow with the_meta-based request model. - Review teaching of Roots, Sampling, Logging, and
includeContextvalues marked deprecated in the changelog. - Verify every numeric recommendation that comes from outside the MCP specification against a dated primary source from the vendor before keeping or changing it.
Primary sources for these checks are the 2026-07-28 changelog, the official specification release announcement, and the post that raised the guide-specific issues.
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