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No public MCP servers use legacy transport, study finds

By PulseAugur Editorial · [1 sources] ·

A recent health check of 86 public MCP servers revealed that none are using the legacy HTTP+SSE transport protocol. The analysis, conducted on August 4, 2026, found that all servers have adopted the Streamable HTTP transport, which uses a single endpoint for requests and responses. This finding contrasts with many current tutorials that still teach the older, two-endpoint method. Additionally, the study highlighted that 86% of these public servers require authentication, meaning they are not truly open for unauthenticated access, and a significant portion of servers are still using protocolVersion 2025-06-18, with none adopting the newer stateless 2026-07-28 revision. AI

IMPACT Confirms shift to modern, single-endpoint transports in public MCP servers, impacting client and server development.

RANK_REASON Analysis of public servers regarding transport protocol usage. [lever_c_demoted from research: ic=1 ai=0.4]

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

No public MCP servers use legacy transport, study finds

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Analysis of public servers regarding transport protocol usage. [lever_c_demoted from research: ic=1 ai=0.4]
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COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Merlonix ·

    We Health-Checked 86 Public MCP Servers. Not One Uses the Legacy Transport.

    <p>We keep a <a href="https://merlonix.com/mcp-directory/" rel="noopener noreferrer">directory of public remote MCP servers</a> and re-check every one of them through the same health checker that powers our <a href="https://merlonix.com/tools/mcp-health/" rel="noopener noreferrer…

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